52671 + Interview Questions in Chemistry in Class 11

1.	Assertion (A) : The orbitals having equal energy are known as degenerate orbitals. Reason (R ) : The three 2p orbitals are degenerate is the presence of external magnetic field.
Answer» Both A and R are true and R is the CORRECT EXPLANATION of A Both A and R are true and R is not the correct explanation of A A is true but R is FALSE Both Aand R are false Answer :C

Discussion

2.	Assertion (A): The melting point of para halobenzene is higher than that of ortho and meta isomers. Reason (R): The higher melting point of p-1somer is due to its symmetry which leads to more close packing of its molecules in the crystal and subsequently p-isomer have strong intermolecular attractive forces.
Answer» both (A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A). Both (A) and (R) are correct but (R) is not the correct explanation of (A). (A) is correct but (R) is WRONG. (A) is wrong but (R) is correct. SOLUTION :both (A) and (R) are correct and (R) is the correct explanation of (A).

Discussion

3.	Assertion (A) :The major product obtained on nitration of phenol with dilute nitric acid is nitrophenol. Reason (R) : o-Nitrophenol exhibits intra hydorgen bonding.
Answer» Both A and R are TRUE and R is the CORRECT EXPLANATION of A. Both A and R are true and R is not a correct explanation of A. A is true but R is false. Both A and R are false. Answer :D

Discussion

4.	Statement-I: The magnetic moment of para hydrogen is zero.Statement-II: The spins of two hydrogen atoms in para H, molecule neutralise each other.
Answer» Both (A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A). Both (A) and (R) are correct but (R) is not the correct explanation of (A). (A) is correct but (R) is WRONG. (A) is wrong but (R) is correct. Answer :a

Discussion

5.	Assertion (A) : The ionisation of hydrogen sulphide in water is low in the presence of hydrochloric acid. Reason (R) : Hydrogen sulphide is a weak acid.
Answer» Both Assertion and REASON are true and Reason is the correct explanation of Assertion. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. Assertion is true but Reason is FALSE. Both Assertion and Reason are false. Solution :Both assertion and reason are correct but reason is not correct explanation of assertion. HCl gives the COMMON H ions and so IONISATION equilibrium `H_2S hArr 2H^(+) + S^(2-)` is suppressed.

Discussion

6.	Assertion (A) : The ionisation of hydrogen sulphide in water is low in the presence of hydrochloric acid. Reason (R): Hydrogen sulphide is a weak acid.
Answer» Both A and Rare trueand R is the correct explanation of A. Both A and Rare truebutR is notthe correct explanation of A. A is true but R is false. Both A and R are false. Solution :Correct explanation. HCl gives the common `H^(+)` IONS and hence IONIZATION EQUILIBRIUM `H_(2)S HARR 2 H^(+) + S^(2-)` is suppressed.

Discussion

7.	Assertion (A) :The increase in kinetic energy breaks the weak intermolecular forces between the gaseous solute and liquid solvent. Reason ® : Which results in the release of the dissolved gas molecules to the liquid state
Answer» Both (A) and ® are TRUE ® is the CORRECT EXPLANATION of (A) Both (A) and ® are TURE and ® is not the correct explanation of (A) (A) true but ® false Both (A) and ® are false Answer :C

Discussion

8.	Assertion (A) : The inductive effect does not transfer electrons from one atom to another . Reason (R) : The inductive effect represents the ability of a particular atom or a group density to the attached carbon .
Answer» Both (A) and (R)are true and (R)is the correct EXPLANATION of (A) Both (A) and (R)are true and (R) is not the CORRECTEXPLANATION of (A) . (A) true but (R) FALSE . Both (A) and (R)are false . SOLUTION :N/A

Discussion

9.	Assertion (A) : The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero . Reason (R) : The volume occupied by themolecules of an ideal gas is zero .
Answer» Both Assertion and REASON are TRUE and Reason is the correct EXPLANATION of the Assertion. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion . Assertion is true but Reason is wrong . Both Assertion and Reason are wrong . Answer :B

Discussion

10.	Assertion (A): The fusion of organic compound with sodium metal for detection of element in organic compound Reason (R ): The N, X, S elements in organic compound is coverted into ionic compound
Answer» STATEMENT (A) and Reason (R ) both are right. Statement (R ) is correct explanation of statement (A) Statement (A) and Reason (R ) both are right, but (R ) is not correct explanation of statement (A) Both Statement (A) and (R ) are wrong Statement (A) is right but statement (R ) is wrong Solution :Statement (A) and Reason (R ) both are right. Statement (R ) is correct explanation of statement (A). `Na + C + N OVERSET("FUSION")rarr N overset(+)(a) CN^(-)` `Na + X overset(Delta)rarr N overset(+)(a) X^(-)` `2NA + S overset(Delta)rarr Na_(2)^(+) S^(2-)` Detection of N, X, S elements in organic compound by these TYPE of ionic reaction and ionic compound produced

Discussion

11.	Assertion (A) : The first ionization energy of Al is lower than Mg.Reason (R ): Atomic radius of Al is smaller than Mg.
Answer» Both (A) and (R) are true and R is CORRECT EXPLANATION of R Both (A) and (R ) are true but R is not the correct explanation of A (A) is true R is FALSE Both (A) and (R ) are false . Answer :b

Discussion

12.	Assertion (A) : The equivalent weights of nitric acid and crystalline oxalic acid are same. Reason (R ) : The basicity is same for both the acids.
Answer» Both (A) and (R ) are TRUE and (R ) is the correct EXPLANATION of (A) Both (A) and (R ) are true and (R ) is not the correct explanation of (A) (A) is true but (R ) is false (A) is false but (R ) is true Solution :`E(HNO_(3))=(63)/(1)=63` `E(H_(2)C_(2)O_(4).2H_(2)O)=(126)/(2)=63`

Discussion

13.	Assertion (A) : The excess of Na left after the preparation of dry solvents (like dry ether) is destroyed by alcohol. Reason (R) :The alcohol reacts with sodium to form sodium alkoxide and hydrogen.
Answer» Both A and R are TRUE and R is the CORRECT EXPLANATION of A. Both A and R are true and R is not a correct explanation of A. A is true but R is FALSE. A is false but R is true. Answer :A

Discussion

14.	Assertion (A): The enthalpy of formation of H_(2)O_((l)) is greater than that of H_(2)O_((g)) Reason (R ): Enthalpy change is negative for the condensation reaction H_(2)O_((g)) rarr H_(2)O_((l))
Answer» A and R are true, R explains A A and R are true, R does not explain A A is true, but R is false A is false, but R is true Solution :`DELTA H_(f(H_(2)O)_(g)) = Delta H_(f(H_(2)O)_(f)) + Delta H_("vap")`

Discussion

15.	Assertion (A) : The empirical mass of ethane is half of its molecular mass. Reason (R) : The empirical formula represents the simplest whole number ratio of various atoms present in a compound.
Answer» Both A and R are true and R is the correct EXPLANATION of A. A is true but R is FALSE. A is false but R is true. Both A and R are false. Solution :Themolecular formula of ethene is `C_(2)H_(4)` and its empirical formula is `CH_(2)`. Thus, MOLECULAR formula `=` Empirical formula `xx2`

Discussion

16.	Assertion (A) the eclipsed conformation of thane is less stable than stggered conformationof ethane Reason (R ) :In eclipsed conformationthe distance between the two methyl groupis minimumand so there is maximum repulsion between them and it is the least stable conformer
Answer» both a and r are correct is r is THECORRECT EXPLANATIN of a both a and r are correct but r is not the correct explanation of a a is correct but r is worng a is worng but r is correct ANSWER :a

Discussion

17.	Assertion (A) : The dehydration of alcohols by conc. H_(2)SO_(4) involves the formation of carbocation. Reason (R) : The protonated alcohol molecule loses water molecule in the second step.
Answer» Both A and R are TRUE and R is the CORRECT EXPLANATION of A. Both A and R are true and R is not a correct explanation of A. A is true but R is FALSE. A is false but R is true. Answer :A

Discussion

18.	(A): The degree of decomposition of PC1_(5)is more at low pressures. (R) : In a reversible reaction, on increasing the pressure the equilibrium shifts in the direction in which decreasein volume takes place.
Answer» both A & R are TRUE, R is the correct explanation of A both A & R are true, R is not correct explanation of A A is true, R is false A is false, R is true Solution :Both A & R are true, R is the correct explanation of A

Discussion

19.	Assertion (A) : The decomposition of hydrogen peroxide to form water and oxygen is an exaple of a disproportionation reaction Reson (R ) The oxygen of peroxide is in -1 oxidation state and it is converted to zero oxidation state in O_(2) and -2 oxidation state inH_(2)O
Answer» both a and r are TURE and r is the correct EXPLANTION of a both a and r are ture but r is not the correct xplanatio of a a is true but r is flase both a nad r are flase SOLUTION : R is the correct expanation of A

Discussion

20.	Assertion (A) : The decomposition of hydrogen peroxide to form water and oxygen is an example of disproportionation reaction. Reason ( R) : The oxygen of peroxide is in -1 oxidation state and it is converted to zero oxidation state in O_(2) and -2 oxidation state in H_(2)O.
Answer» Both A and R are TRUE and R is the CORRECT EXPLANATION of A. Both A and R true but R is not the correct explanation of A. A is true but R is false. Both A and R are false. Solution :

Discussion

21.	Assertion (A) : The decomposition of hydrogen peroxide to form water and oxygen is an example ofdisproportion reaction Reson (R ) : In the represent E_(Fe^(3+)//Fe^(2+)) and E_(Fe^(3+)//Fe^(2+)) Fe^(3+)//Fe^(2+) and Cu^(2+)//Cuare redox couples
Answer» both a and r are ture and r is the correct explantion of a both a and r are ture but r is not the correct xplanatio of a a is TRUE but r is FLASE both a nad r are flase SOLUTION :R is the correct explanation of A

Discussion

22.	Assertion (A) : The cut apple turns brown. Reason (R) : Cut apple exposes its cells to atomspheric oxygen and the oxidises the phenolic compound present in it.Due to this enzymaticbrowning the cut apple turns brown.
Answer» Both(A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A). Both (A) and (R) are correct but (R) is not the correct explanation of (A). (A) is correct but (R) is WRONG (A) is wrong but (R) is correct Solution :Both (A) and (R) are correct but (R) is not the correct explanation of (A).

Discussion

23.	Assertion (A) : The configuration of B atom cannot be 1s^(2)2s^(2) Reason (R ) : Hund's rule demands thatthe configuration should display maximum multiplicity
Answer» If both (A) and (R ) correct and (R ) is the CORRECTEXPLANATION for (A) If both (A) and (R ) correct and (R ) is the correctexplanation for (A) If (A) is correct but (R ) is incorrect If (A) is incorrect but (R ) is correct Solution :Configuration of `B = 1s^(2)2S^(2)3s^(2)`

Discussion

24.	Assertion (A) : The concentration terms of pure liquids can also be excluded from the expression of the equilibrium constant. Reason (R) : The active mass concentration of the pure liquid does not charge at a given temperature.
Answer» Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A). Both (A) and (R) are true and (R) is not the correct explanation of (A). (A) true but (R) false. Both (A) and (R) are false. Answer :A

Discussion

25.	Assertion (A) : The carbonate of lithium decomposes easily on heating to form lithium oxide and CO_(2) . Reason (R) : Lithium being very small in size polarises large carbonate ion leading to the formation of more stable
Answer» Both A and R are CORRECT and R is the correct EXPLANATION of A. Both A and R are correct but R is not the correct explanation of A. Both A and R are not correct A is not correct but R is correct. Solution :Both A and R are correct and R is the CORRET explanation of A .

Discussion

26.	Assertion (A) : The carbonate of lithium decomposes easily on heating to form lithium oxide and CO_(2) Reason (R) : Lithium being very small in size polarises large carbonate ion leading to the formation of more stable Li_(2)O and CO_(2).
Answer» Both A and R are CORRECT and R is the correct explanation of A. Both A and R are correct but R is not the correct explanation of A. Both A and R are not correct. A is not correct but R is correct Solution :`Li_(2)CO_(3)`is unstable and decomposes on heating . Due to small size of `Li^(+)`, it has strong POLARIZING power to distorts the electron cloud of `CO_(3)^(2-)` ION. Lattice energy of `Li_(2)O` is higher than `Li_(2)CO_(3)`.

Discussion

27.	Assertion (A): The C-I in CH_3X is weak. Reason (R): Larger the size, greater is the bond length and weaker is the bond formed.
Answer» Both (A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A). Both (A) and (R) are correct but (R) is the correct explanation of (A). (A) is correct but (R) is WRONG (A) is wrong but (R) is correct Solution :Both (A) and (R) are correct and (R) is the correct explanation of (A).

Discussion

28.	Assertion (A) : The C-C bond in ethane is non-polar while the C-C bond in ethyl chloride is polar. Reason(R) : Chlorine is more electronegative than carbon and hence it attracts the shared paired of electron between C - CI in ethyl chloride and it develops a negative charge on CI andpositive charge on Carbon.
Answer» Both(A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A). Both (A) and (R) are correct but (R) is not the correct explanation of (A). (A) is correct but (R) is WRONG (A) is wrong but (R) is correct Solution :Both (A) and (R) are correct but (R) is not the correct explanation of (A).

Discussion

29.	Assertion (A) : The bond length depends on the size of the atom and the number of bondsbetween the combining atoms. Reason (R ) : The distance between the nuclei of the two Covalently bonded atoms is called bond length .
Answer» Both (A) and (R ) are TRUE and (R ) is the CORRECT explanation of (A) . Both (A) and (R ) are true and (R ) is not the correct explanation of (A) . (A) true but (R ) FALSE. Both (A) and (R ) are false . ANSWER :a

Discussion

30.	Assertion(A) : The boilingpoint of straightchain isomers have higher boiling point as compared to branchedchain isomers Reson(R ) The boiling pointdecreases with increase in branching as the molecule becomes compact and the area of contact decreases
Answer» both a and R are CORRECT and r is the correctexpalanation a both a and r are correct but r is not the correct EXPLANATION of a a is correct but r is worng AIS wrong but r is correct ANSWER :a

Discussion

31.	Assertion (A): The boiling point of cis-2-butene is more than trans-2-butene Reason (R): Cis-2-butene is more polar than trans
Answer» both A and R are TRUE and R is the correct EXPLANATION of A both A and R are true and R is not the correct explanation of A A is true but R is false A is false but R is true Solution :More is the POLARITY more is the boiling point

Discussion

32.	Assertion (A) : The basicity of orthophosphorus acid, H_(3)PO_(3) is 2. Reason (R ) : Three hydrogen atoms are attached to phosphorus through oxygen atoms in H_(3)PO_(3).
Answer» <P>Both (A) and (R ) are TRUE and (R ) is the correct EXPLANATION of (A) Both (A) and (R ) are true and (R ) is not the correct explanation of (A) (A) is true but (R ) is false (A) is false but (R ) is true Solution :n - F = 2, one H directly attached to P

Discussion

33.	Assertion (A): The aqueous solution of CH_(3)COONa is alkaline in nature.Reason (R): Acetate ion undergoes anionic hydrolysis. The correct answer is
Answer» Both (A ) and (R ) are true and (R )is the correct explanation of (A ) Both (A) and (R ) are true and (R )is not the correct explanation of (A) (A ) is true but (R ) is FALSE (A ) is false but (R ) is true Solution :` CH_3 COO^(-)` UNDERGOES ANION hydrolysis

Discussion

34.	Assertion (A) : Tertiary butyl alcohol is more reactive towards dehydration in comparison to primary alcohol. Reason (R) : Secondary carbonium ion is more stable than primary carbonium ion.
Answer» Both A and R are true and R is the CORRECT EXPLANATION of A. Both A and R are true and R is not a correct explanation of A. A is true but R is false. A is false but R is true. Answer :B

Discussion

35.	Assertion (A) : Sulphur present in an organic compound can be estimated quantitatively by Carius method. Reason (R) : Sulphur is separated easily from other atoms in the molecule and gets precipitated as light yellow solid.
Answer» Both A and R are correct and R is the correct explanation of A. Both A and R are correct but R is not the correct explanation of A. Both A and R are not correct. A is not correct but R is correct. Solution :Correct (R). Sulphur is oxidised to `H_(2)SO_(4)` in Carius method and then ESTIMATED as BARIUM SULPHATE.

Discussion

36.	Assertion (A): Sulphur present in an organic compound can be estimated quantitatively by Carius method. Reason ( R): Sulphur is separated easily from other atoms in the molecule and gets precipitated as light yellow solid
Answer» Both (A ) and (R ) are CORRECT and (R ) is the correct EXPLANATION of (A) Both (A) and R are correct but (R ) is not the correct explanation of (A) Both (A) and (R ) are not correct (A) is not correct but (R ) is correct Answer :B

Discussion

37.	Assertion (A) : Sulphur present in an organic compound can be estimated quantitatively bu Carius method. Reason (R) : Sulphur is separated easily from other atoms in the molecule and hets precipitated as light yellow solid.
Answer» Both A and R are CORRECT and R is the correct explanation of A. Both A and R are correct but R is not the correct explanation of A. Both A and R are not correct A is not correct but R is correct Solution :Correct assertion . SULPHUR present in those organic compounds can be estimated by Carius method in which it can be oxidised to `H_(2)SO_(4)`. Correct reason. Sulphur cannot be SEPARATED from other atoms in a MOLECULE.

Discussion

38.	Assertion (A) : Stream reforming process is a well established industrial process is a well etablished industrial process for the production of H2 gas from hydrocarbons . Reason (R ) : Production of the gas from methane is known as steam reforming process .
Answer» Both (A) and (R ) are TRUE . (A) true but (R ) FALSE (A) false but (R ) true Both (A) and (R ) are false. Answer :A::B::D

Discussion

39.	Assertion (A) : Spontaneous process is an irreversible process and may be reversed by some external agency. Reason (R) : Decrease in enthalpy is a contributory factor for spontaneity.
Answer» ANSWER :(B)

Discussion

40.	Assertion (A): Spontaneous process is an irreversible process and may be reversed by external agency Reason (R): Decrease in enthalpy is a contributory factor for spontaneity.
Answer» 1) both Assertion and Reason are true and Reason is the CORRECT explanation of Assertion 2) both Assertion and Reason are true and Reason is notcorrect explanation of Assertion 3) both Assertion and Reason are FALSE 4) Assertion is false but Reason is true Answer :B

Discussion

41.	Assertion. A spectral line will be seen for a 2p_(x) - 2p_(y) transition Reason. Energy is released in the form of waves of light when the electron drops from 2p_(x) " to " 2p_(y) orbital
Answer» If both assertion and REASON are true, and reason is the true explanation of the arrertion If both assertion and reason are true, but reason is not the true explanation of the assertional If assertion is true, but reason is false If both assertion and reason are false Solution :CORRECT A. No spectral LINE is observed for `2p_(x) - 2p_(y)` transition Correct R. No energy is RELEASED when ELECTRON drops from `2p_(x) " to " 2p_(y)` (because they are degenerate orbitals)

Discussion

42.	Assertion (A) : Some metals like platinum and palladium , can be used as storage media for hydrogen . Reason (R) : Platinum and palladium can absorb large volumes of hydrogen.
Answer» STATEMENTS A and R both are CORRECT and R is the correct EXPLANATION of A. A is correct but R is not correct A and R both are correct but R is not the correct explanation of A. A and R both are false. Solution :(a) R is the correct explanation of A.

Discussion

43.	Assertion (A): Some metals like platinum and palladium, can be used as storage media for hydrogen. Reason (R): Platinum and palladium can absorb large volumes of hydrogen.
Answer» STATEMENTS (A) and R both are correct and (R) is the correct explanation of (A) (A) is correct but (R) is not correct (A) and R both are correct but (R) is not the correct explanation of (A) (A) and (R) both are false Solution :Statements of ASSERTION and reason both are correct and reason is the correct explanation of assertion. Since, metals like Pd and Pt adsorbs a large volume of hydrogen hence, these are used as a storage media for it.

Discussion

44.	Assertion (A): Sodium hydrogen carbonate is used in baking cakes and pastries Reason (R): On heating sodium hydrogen carbonate, liberates bubbles of CO_(2) leaving holes in cakes and making them light and fluffy.
Answer» both (A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A) both (A) and (R) are correct but (R) is not the correct explanation of (A) (A) is correct but (R) is WRONG (A) is wrong but (R) is correct Answer :A

Discussion

45.	Assertion (A) : Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound. Reason (R) : This is because sodium and chloride ions acquire octet in sodium chloride formation.
Answer» A and R both are correct, and R is the correct explanation of A. A and R both are correct, but R is not the correct explanation of A. A is true but R is FALSE. A and R both are false. Solution :(A) Assertion and reason both are correct and reason is the correct explanation of assertion. NA + Cl `RARR` NaCl (2,8,1)(2,8,7)(2,8)(2,8,8) Here both `Na^(+)` and `Cl^(-)` have COMPLETE OCTET hence NaCl is stable.

Discussion

46.	Assertion (A) : Smoke consists of unburnt electrically charged carbon articles dispersed in waste gases. But the smoke coming out from the chimney of the factory is free from carbon particles. Reason (R): The smoke is passed through the charged plates before allowing it to escape out of the chimney, when the charged particles of carbon get discharged.
Answer» Both A and R are true and R is the correct explanation of A Both A and R are true but R is not a correct explanation of A A is true but R is FALSE A is false but R is true Answer :A

Discussion

47.	(A): Smaller particles (Size < 5 microns) cause fibrosis of the lung lining. (R) : Smaller particles (Size < 5 microns) are more likely to penetrate into the lungs.
Answer» Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A) Both (A) and (R) are true and (R) is not the correct explanation of (A) (A) is true but (R) is false (A) is false but (R) is true ANSWER :A

Discussion

48.	Assertion (A) : Simple distillation can help in separating a mixture of propan-1-ol (boling point 97^(@)C) and propanone (boiling point 56^(@)C). Reason (R) : Liquids with a difference of more than 20^(@)C in their boiling points can be separated by simple distillation.
Answer» Both A and R are CORRECT and R is the correct explanation of A. Both A and R are correct but R is not the correct explanation of A. Both A and R are not correct A is not correct but R is correct Solution :REASON is the correct explanation for Assertion

Discussion

49.	Assertion (A) : Simple distillation can help in separating a mixture of propan-1-ol (boiling point 97^(@)C) and propanone (b.p 56^(@)C). Reason (R ): Liquids with a difference of more than 20^(@)C in their boiling points can be separated by simple distillation
Answer» Both (A ) and (R ) are CORRECT and (R ) is the correct EXPLANATION of (A) Both (A) and R are correct but (R ) is not the correct explanation of (A) Both (A) and (R ) are not correct (A) is not correct but (R ) is correct Answer :A

Discussion

50.	Assertion (A): Simple distillation can help in separating a mixture of propan-1-ol (boiling point 97^(@)C) and propanone (boiling point 56^(@)C). Reason (R): Liquids with a difference of more than 20^(@)C in their boiling points can be separated by simple distillation.
Answer» Both ASSERTION and REASON are CORRECT and reason is the correct EXPLANATION of assertion. Both assertion and reason are correct but reason is not the correct explanation of assertion. Assertion is correct.but reason is WRONG Assertion is wrong but reason is correct. Answer :A

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Assertion (A) : The orbitals having equal energy are known as degenerate orbitals. Reason (R ) : The three 2p orbitals are degenerate is the presence of external magnetic field.

Assertion (A) :The major product obtained on nitration of phenol with dilute nitric acid is nitrophenol. Reason (R) : o-Nitrophenol exhibits intra hydorgen bonding.

Statement-I: The magnetic moment of para hydrogen is zero.Statement-II: The spins of two hydrogen atoms in para H, molecule neutralise each other.

Assertion (A) : The ionisation of hydrogen sulphide in water is low in the presence of hydrochloric acid. Reason (R) : Hydrogen sulphide is a weak acid.

Assertion (A) : The ionisation of hydrogen sulphide in water is low in the presence of hydrochloric acid. Reason (R): Hydrogen sulphide is a weak acid.

Assertion (A) :The increase in kinetic energy breaks the weak intermolecular forces between the gaseous solute and liquid solvent. Reason ® : Which results in the release of the dissolved gas molecules to the liquid state

Assertion (A) : The inductive effect does not transfer electrons from one atom to another . Reason (R) : The inductive effect represents the ability of a particular atom or a group density to the attached carbon .

Assertion (A) : The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero . Reason (R) : The volume occupied by themolecules of an ideal gas is zero .

Assertion (A): The fusion of organic compound with sodium metal for detection of element in organic compound Reason (R ): The N, X, S elements in organic compound is coverted into ionic compound

Assertion (A) : The first ionization energy of Al is lower than Mg.Reason (R ): Atomic radius of Al is smaller than Mg.

Assertion (A) : The equivalent weights of nitric acid and crystalline oxalic acid are same. Reason (R ) : The basicity is same for both the acids.

Assertion (A) : The excess of Na left after the preparation of dry solvents (like dry ether) is destroyed by alcohol. Reason (R) :The alcohol reacts with sodium to form sodium alkoxide and hydrogen.

Assertion (A): The enthalpy of formation of H_(2)O_((l)) is greater than that of H_(2)O_((g)) Reason (R ): Enthalpy change is negative for the condensation reaction H_(2)O_((g)) rarr H_(2)O_((l))

Assertion (A) : The empirical mass of ethane is half of its molecular mass. Reason (R) : The empirical formula represents the simplest whole number ratio of various atoms present in a compound.

Assertion (A) the eclipsed conformation of thane is less stable than stggered conformationof ethane Reason (R ) :In eclipsed conformationthe distance between the two methyl groupis minimumand so there is maximum repulsion between them and it is the least stable conformer

Assertion (A) : The dehydration of alcohols by conc. H_(2)SO_(4) involves the formation of carbocation. Reason (R) : The protonated alcohol molecule loses water molecule in the second step.

(A): The degree of decomposition of PC1_(5)is more at low pressures. (R) : In a reversible reaction, on increasing the pressure the equilibrium shifts in the direction in which decreasein volume takes place.

Assertion (A) : The decomposition of hydrogen peroxide to form water and oxygen is an exaple of a disproportionation reaction Reson (R ) The oxygen of peroxide is in -1 oxidation state and it is converted to zero oxidation state in O_(2) and -2 oxidation state inH_(2)O

Assertion (A) : The decomposition of hydrogen peroxide to form water and oxygen is an example of disproportionation reaction. Reason ( R) : The oxygen of peroxide is in -1 oxidation state and it is converted to zero oxidation state in O_(2) and -2 oxidation state in H_(2)O.

Assertion (A) : The decomposition of hydrogen peroxide to form water and oxygen is an example ofdisproportion reaction Reson (R ) : In the represent E_(Fe^(3+)//Fe^(2+)) and E_(Fe^(3+)//Fe^(2+)) Fe^(3+)//Fe^(2+) and Cu^(2+)//Cuare redox couples

Assertion (A) : The cut apple turns brown. Reason (R) : Cut apple exposes its cells to atomspheric oxygen and the oxidises the phenolic compound present in it.Due to this enzymaticbrowning the cut apple turns brown.

Assertion (A) : The configuration of B atom cannot be 1s^(2)2s^(2) Reason (R ) : Hund's rule demands thatthe configuration should display maximum multiplicity

Assertion (A) : The concentration terms of pure liquids can also be excluded from the expression of the equilibrium constant. Reason (R) : The active mass concentration of the pure liquid does not charge at a given temperature.

Assertion (A) : The carbonate of lithium decomposes easily on heating to form lithium oxide and CO_(2) . Reason (R) : Lithium being very small in size polarises large carbonate ion leading to the formation of more stable

Assertion (A) : The carbonate of lithium decomposes easily on heating to form lithium oxide and CO_(2) Reason (R) : Lithium being very small in size polarises large carbonate ion leading to the formation of more stable Li_(2)O and CO_(2).

Assertion (A): The C-I in CH_3X is weak. Reason (R): Larger the size, greater is the bond length and weaker is the bond formed.

Assertion (A) : The bond length depends on the size of the atom and the number of bondsbetween the combining atoms. Reason (R ) : The distance between the nuclei of the two Covalently bonded atoms is called bond length .

Assertion(A) : The boilingpoint of straightchain isomers have higher boiling point as compared to branchedchain isomers Reson(R ) The boiling pointdecreases with increase in branching as the molecule becomes compact and the area of contact decreases

Assertion (A): The boiling point of cis-2-butene is more than trans-2-butene Reason (R): Cis-2-butene is more polar than trans

Assertion (A) : The basicity of orthophosphorus acid, H_(3)PO_(3) is 2. Reason (R ) : Three hydrogen atoms are attached to phosphorus through oxygen atoms in H_(3)PO_(3).

Assertion (A): The aqueous solution of CH_(3)COONa is alkaline in nature.Reason (R): Acetate ion undergoes anionic hydrolysis. The correct answer is

Assertion (A) : Tertiary butyl alcohol is more reactive towards dehydration in comparison to primary alcohol. Reason (R) : Secondary carbonium ion is more stable than primary carbonium ion.

Assertion (A) : Sulphur present in an organic compound can be estimated quantitatively by Carius method. Reason (R) : Sulphur is separated easily from other atoms in the molecule and gets precipitated as light yellow solid.

Assertion (A): Sulphur present in an organic compound can be estimated quantitatively by Carius method. Reason ( R): Sulphur is separated easily from other atoms in the molecule and gets precipitated as light yellow solid

Assertion (A) : Sulphur present in an organic compound can be estimated quantitatively bu Carius method. Reason (R) : Sulphur is separated easily from other atoms in the molecule and hets precipitated as light yellow solid.

Assertion (A) : Stream reforming process is a well established industrial process is a well etablished industrial process for the production of H2 gas from hydrocarbons . Reason (R ) : Production of the gas from methane is known as steam reforming process .

Assertion (A) : Spontaneous process is an irreversible process and may be reversed by some external agency. Reason (R) : Decrease in enthalpy is a contributory factor for spontaneity.

Assertion (A): Spontaneous process is an irreversible process and may be reversed by external agency Reason (R): Decrease in enthalpy is a contributory factor for spontaneity.

Assertion. A spectral line will be seen for a 2p_(x) - 2p_(y) transition Reason. Energy is released in the form of waves of light when the electron drops from 2p_(x) " to " 2p_(y) orbital

Assertion (A) : Some metals like platinum and palladium , can be used as storage media for hydrogen . Reason (R) : Platinum and palladium can absorb large volumes of hydrogen.

Assertion (A): Some metals like platinum and palladium, can be used as storage media for hydrogen. Reason (R): Platinum and palladium can absorb large volumes of hydrogen.

Assertion (A): Sodium hydrogen carbonate is used in baking cakes and pastries Reason (R): On heating sodium hydrogen carbonate, liberates bubbles of CO_(2) leaving holes in cakes and making them light and fluffy.

Assertion (A) : Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound. Reason (R) : This is because sodium and chloride ions acquire octet in sodium chloride formation.

(A): Smaller particles (Size < 5 microns) cause fibrosis of the lung lining. (R) : Smaller particles (Size < 5 microns) are more likely to penetrate into the lungs.

Assertion (A) : Simple distillation can help in separating a mixture of propan-1-ol (boling point 97^(@)C) and propanone (boiling point 56^(@)C). Reason (R) : Liquids with a difference of more than 20^(@)C in their boiling points can be separated by simple distillation.

Assertion (A) : Simple distillation can help in separating a mixture of propan-1-ol (boiling point 97^(@)C) and propanone (b.p 56^(@)C). Reason (R ): Liquids with a difference of more than 20^(@)C in their boiling points can be separated by simple distillation

Assertion (A): Simple distillation can help in separating a mixture of propan-1-ol (boiling point 97^(@)C) and propanone (boiling point 56^(@)C). Reason (R): Liquids with a difference of more than 20^(@)C in their boiling points can be separated by simple distillation.