52671 + Interview Questions in Chemistry in Class 11

1.	Moreover, the salt (A) on heating with solid K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) produces deep red vapors which dissolve in sodium hydroxide solution forming a yellow solution. This yellow solution gives yellow precipitate with Ba(NO_(3))_(2) solution. On the basis of teh aforesaid characteristic informations answer the following questions: The black precipitate F on heating with water produces:
Answer» `HG(OH)_(2)` `BIOI` `BiO.OH` `CuO.OH` SOLUTION :

Discussion

2.	Moreover, the salt (A) on heating with solid K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) produces deep red vapors which dissolve in sodium hydroxide solution forming a yellow solution. This yellow solution gives yellow precipitate with Ba(NO_(3))_(2) solution. On the basis of teh aforesaid characteristic informations answer the following questions: Acidified solution of A, on treatment with KI gives black precipitate F which dissolves in excess of reagent forming the coloured compound G. The chemical composition of F and G are respectively:
Answer» `HgI_(2)` and `[HgI_(4)]^(2-)` `PbI_(2)` and `[PbI_(4)]^(2-)` `BiI_(3)` and `[BiI_(4)]^(-)` `Cu_(2)I_(2)` and `CuI_(2)` Solution :

Discussion

3.	Moratar is a mixture of
Answer» `CaCO_(3) and CaO` SLAKED lime,annd, water Slaked lime and water `CaCO_(3),` sand and water Answer :B

Discussion

4.	Monovalent cations having stable electronic configurations similar to the
Answer» ALKALI metals alkaline EARTH metals Noble gas Halgens Answer :C

Discussion

5.	Monomer in silicone is
Answer» `R_(2)SI(OH)_(2)` `R_(2)Si=O` `R_(2)SiCl_(2)` `R_(2)SIC(OH)` Answer :A

Discussion

6.	monohalogenation Q. Which halogen will give the best yield of the monohalogenation product?
Answer» `F_(2)`<BR>`Cl_(2)` `Br_(2)` `I_(2)` ANSWER :A

Discussion

7.	Monoclinic crystal has dimension
Answer» `a NE b ne c , alpha ne beta ne gamma 90^(@)` `a=b ne c , alpha = beta= gamma = 90^(@)` `a=b=c,alpha = beta=gamma =90^(@)` `a ne b ne c , alpha = gamma = 90^(@) , beta ne 90^(@)` SOLUTION :For monoclinic crystals axial RATIOS are not EQUAL i.e., `a ne b ne c` and axial angle `alpha = gamma = 90^(@) ne beta`.

Discussion

8.	Monocarbonyl compounds have very small percentage enol form at equilibrium . Explains.
Answer» ANSWER :In Monocarbonyl KETO form is more stable due to greater strength of the CARBON-oxygen double BOND as compared to the carbon carbon double bond.

Discussion

9.	monoatomicanion of unitchargecontains45neutrons and36electrons. What is theatomicmas of the elementand inwhichgroup of theperiodictabledoes it lie ?
Answer» SOLUTION :No.Of neutrons of themonoatomic anion = 45 No. ofelectrons of the MONOATOMICANION = 36`:. `No. of electronsof the monoatomicatom= 36 -1 = 3 `:. ` ATOMICNUMBER of theatom `(Z= 35)`. Thereforethe atomis bromineand itbelongsto group17, i.e.,halogenfamily . No. ofprotons= No. of electrons=35 `:. `Atomicmass =No . ofneutrons +No. ofprotons= 45+ 35=80

Discussion

10.	Mond process is for the purification of
Answer» MO Mn Ni None of these. Answer :C

Discussion

11.	Moltensodiumis usedin nuclearreactorsto ______.
Answer» ABSORB neutronsin ORDERTO contralthechainreaction SLOW downthe fastneutrons absorbthe heatgeneratedby nuclearfission extractradio -ISOTOPES proucedin thereactor Answer :C

Discussion

12.	Molten sodium chloride conducts electricity due to the presence of
Answer» free electrons free IONS free molecules atoms of sodium and CHLORINE. Solution :Molten sodium chloride CONDUCTS ELECTRICITY DUE to free ions.

Discussion

13.	Moltenaluminium bromide ispoor conductor of electricity. Explain.
Answer» SOLUTION :Aluminium bromide is a covalent moelcule. Even INTHE MOLTEN state, it ionizesto a very small extentand henceit is a poorconductorof ELECTRICITY.

Discussion

14.	Moles of KHC_(2)O_(4) (potassiumacid oxalate) required to reduce 100 mL of 0.02M KMnO_(4) in acidic medium (to Mn^(2+)) is
Answer» `0.002` `0.005` `0.001` `0.007` SOLUTION :EQ. `KHC_(2)O_(4)` = eq. `KMnO_(4)` `nxx2=0.1xx0.02xx5impliesn=0.005`

Discussion

15.	Moles of ABC_(3) produced in the following set tio reaction when 180gm of A, 180gm of B and 200gm of C are mixed in a container (given molar mas of A, B ,C and 20,30 and 10 respectively). 2A + 3B + 5C rightarrow A_(2)BC + B_(2)C_(3)……………..(i) B_(2)C_(3) + 3C rightarrow 2BC_(3)..................(ii) BC_(3) + A rightarrow ABC_(3)...............(iii)
Answer» 5 4 43741 20/3 Answer :B

Discussion

16.	Molecules with sp^(2) hybridisation will have the followig shape
Answer» linear Trigonal planar Tetrahedral Pyramidal Answer :B

Discussion

17.	Molecules of liquid hydrogenchloride are held with
Answer» LONDON, DISPERSION FORCES DIPOLE-induced dipole forces Dipole-dipole forces Induced dipole-induced dipole forces Answer :C

Discussion

18.	Molecules of a gas are considered as point groups. What does this signify?
Answer» SOLUTION :ACTUAL volume OCCUPIED by molecule of a GAS is negligible. This assumption explains great compressibility of gases.

Discussion

19.	Molecules having the least RMS velocity at constant temperature are
Answer» `CO_2` `SO_2` `ClO_2` `NO_2` SOLUTION :LEAST RMS `IMPLIES ` HIGHEST `M implies ClO_2`.

Discussion

20.	Molecules having same molecular formula. But differing in structure (or) spatial orientation of atom is known isomers and phenomenon known as isomerism. Molecules which differ in structural formula are known as structural isomers and phenomenon is known as structural isomerism structural isomerism can be broadly classified as (i) Chain isomerism(ii) Positional isomerism(iii) Functional isomerism (iv) Metamerism(v) Tautomerism Molecules having same molecular formula but differing in spatial orientation are known as stereo isomers and the phenomenon known as stereo isomerism. Stero isomerism can be classified as (i) Geometrical isomerism (ii) Optical isomerism The phenomenon in which molecules having same molecular formula and same functional group but differing in the nature of alkyl group attached to functional group known as
Answer» Functional isomerism METAMERISM Structural isomerism Positional isomerism SOLUTION :It is the DIFINITION of Metamerism

Discussion

21.	Molecules having distorted tetrahedral geometry are-
Answer» `H_(2)O` `NH_(2)` `BF_(4)^(-)` `XeF_(2)` Answer :A::B::C::D

Discussion

22.	Molecules having same molecular formula. But differing in structure (or) spatial orientation of atom is known isomers and phenomenon known as isomerism. Molecules which differ in structural formula are known as structural isomers and phenomenon is known as structural isomerism structural isomerism can be broadly classified as (i) Chain isomerism(ii) Positional isomerism(iii) Functional isomerism (iv) Metamerism(v) Tautomerism Molecules having same molecular formula but differing in spatial orientation are known as stereo isomers and the phenomenon known as stereo isomerism. Stero isomerism can be classified as (i) Geometrical isomerism (ii) Optical isomerism How many structural isomers possible for the given compound C_(4)H_(10)O
Answer» 5 6 7 10 Solution :`C-C-C-C-OH""C-C-O-C-C` `C-C-UNDERSET(OH)underset(\|)C-C""C-C-C-O-C` `C-underset(OH)underset(\|)C-C-OH""C-underset( C )underset(\|)C-O-C` `C-underset(OH)underset(\|)OVERSET( C )overset(\|)C-C`

Discussion

23.	Molecules having same molecular formula. But differing in structure (or) spatial orientation of atom is known isomers and phenomenon known as isomerism. Molecules which differ in structural formula are known as structural isomers and phenomenon is known as structural isomerism structural isomerism can be broadly classified as (i) Chain isomerism(ii) Positional isomerism(iii) Functional isomerism (iv) Metamerism(v) Tautomerism Molecules having same molecular formula but differing in spatial orientation are known as stereo isomers and the phenomenon known as stereo isomerism. Stero isomerism can be classified as (i) Geometrical isomerism (ii) Optical isomerism Which of the following pair exhibit functional isomerism
Answer» ether and alcohol ether and KETONE ketone and carboxylic ACID carboxylic acid and alcohol SOLUTION :Ether and alocohol have same molecular FORMULA but different functional GROUPS.

Discussion

24.	The molecule having zero dipole moment is
Answer» `BCl_(3)` `BeCl_(2)` `"CC"l_(4)` All of these Answer :D

Discussion

25.	Molecule with dipole moment among the following
Answer» `SF_(6)` `SF_(4)` `"CCl_(4)` `CH_(4)` Answer :B

Discussion

26.	Molecule which contains 4 bond pairs and 2 lone pairs of electrons on the central atom is
Answer» `XeF_2` `CO_2` `XeF_4` `SF_6` ANSWER :C

Discussion

27.	What is Eltonian pyramid?
Answer» SOLUTION :`BF_(3)`

Discussion

28.	Molecule is the smallest particle of a substance which is capable of..........
Answer» ANSWER :INDEPENDENT EXISTENCE

Discussion

29.	Molecule having an incomplete octet in the central atom is
Answer» `PCl_5` `NH_3` `BCl_3` `H_2O` SOLUTION :`BCl_3` has 6 ELECTRONS in valence SHELL of .B.

Discussion

30.	Molecular weights of ammonia and nitrogen are respectively X_(1) and X_(2). In the reaction of producing ammonia.N_(2)+3H_(2)to2NH_(3) , the equivalent weights ofammoniaand nitrogen are given as respectively y_(1) and y_(2). Then how is (y_(1)-y_(2)) related to molecular weights?
Answer» ANSWER :`(2"X"_(2)-"x"_(1))//6)`

Discussion

31.	Molecular weight of Mohr.s salt is 392. Its equivalent weight when it is oxidised by KMnO_(4) in acidic medium is
Answer» 392 196 `130.6` `78.5` Solution :n-f of `FeSO_(4)(NH_(4))_(2)SO_(4).6H_(2)O=1impliesE=(M)/(1)`

Discussion

32.	Molecular weight of orthophosphoric acid is M. Its equivalent weight is
Answer» 3M M `(M)/(2)` `(M)/(3)` Solution :`H_(3)PO_(4),n=f=3impliesE=(M)/(3)`

Discussion

33.	Molecular weight of Mohr's salt is 392. Its equivalent weight when it is oxidised by KMnO_4 in acidic medium is
Answer» 392 196 130.6 78.5 Answer :A

Discussion

34.	Molecular weight of Mohr's salt is 392. Its equivalent weight when it is oxidised by KMnO, in acidic medium is
Answer» 392 196 130.6 78.5 Answer :A

Discussion

35.	Molecular weight of KMnO_(4) is "M". In a reaction KMnO_(4) is reduced to KMnO_(4). The equivalent weight of KMnO, is
Answer» M `M//2` `M//3` `M//5` SOLUTION :n-factor = 1 IMPLIES `E=(M)/(1)`

Discussion

36.	Molecular weight of a gas is 44. The volume occupied by 2.2 grams of the gas under STP is
Answer» 1.12 lit 1.14 lit 2.24 lit 5.6 lit Solution :Under STP 1 MOLE `= 22.4L` `(2.2)/(44) = ?`

Discussion

37.	Molecular weight of a gas, 11.2 litres of which at NTP weighs 14 g, is
Answer» 14 28 `14/(11.2)` `14 XX 11.2` ANSWER :B

Discussion

38.	Molecular weight of a dibasic acid is 132. If 33 grams of acid is present in 400ml solution, calculate molarity and normality
Answer» ANSWER :0.625M and 1.25N

Discussion

39.	Molecular orbitals are formed by the overlap of atomic orbitals . Two atomic orbitals combine to form two molecular orbitals, called Bonding Molecular Orbital (BMO) and Anti - Bonding Molecular Orbital (ABMO). Different atomic orbitals of one atom combine with those atomic orbitals of the second atom which have comparable energles and proper orientationFurther, if overlapping is head on, the molecular orbitals is called 'sigma' and if the overlap is lateral, the molecular orbital is called 'pi' . The molecular orbitals are filled with electrons following the same rules as followed for filling of atomic orbitals . However, the order of filling in not the same for of the most important parameter to compare a number of their characteristics In whihc of the following pair the moelcular orbitals are gerade or ungerade ?
Answer» `sigma_(2s), pi_(2p_(x))` `sigma_(2s)^(), pi_(2p_(x))^()` `sigma_(2s)^(), pi_(2p_(x))` `pi_(2p_(x)), pi_(2p_(x))^()` ANSWER :C

Discussion

40.	Molecular shapes ofSF_(4), CF_(4), XeFe_(4)are
Answer» the same with 2, 0 and 1 lone PAIRS of electrons RESPECTIVELY the same with 1,1 and 1 lone pairs of electrons respectively the same with 0.1 and 2 lone pairs of electrons respectively the same with 1, 0 and 2 lone pairs of electrons respectively Answer :D

Discussion

41.	Molecular orbitals are formed by the overlap of atomic orbitals . Two atomic orbitals combine to form two molecular orbitals, called Bonding Molecular Orbital (BMO) and Anti - Bonding Molecular Orbital (ABMO). Different atomic orbitals of one atom combine with those atomic orbitals of the second atom which have comparable energles and proper orientationFurther, if overlapping is head on, the molecular orbitals is called 'sigma' and if the overlap is lateral, the molecular orbital is called 'pi' . The molecular orbitals are filled with electrons following the same rules as followed for filling of atomic orbitals . However, the order of filling in not the same for of the most important parameter to compare a number of their characteristics H_(2), Li_(2), B_(2) eachhas bond order equal to 1 . The order of their stability is
Answer» `H_(2) = Li_(2) = B_(2)` `H_(2) GT Li_(2) gt B_(2)` `H_(2) gt B_(2) gt Li_(2)` `B_(2) gt Li_(2) gt H_(2)` ANSWER :C

Discussion

42.	Molecular orbitals are formed by the overlap of atomic orbitals . Two atomic orbitals combine to form two molecular orbitals, called Bonding Molecular Orbital (BMO) and Anti - Bonding Molecular Orbital (ABMO). Different atomic orbitals of one atom combine with those atomic orbitals of the second atom which have comparable energles and proper orientationFurther, if overlapping is head on, the molecular orbitals is called 'sigma' and if the overlap is lateral, the molecular orbital is called 'pi' . The molecular orbitals are filled with electrons following the same rules as followed for filling of atomic orbitals . However, the order of filling in not the same for of the most important parameter to compare a number of their characteristics Which one of the following has maximum number of nodal planes ?
Answer» `sigma_(1s)^()` `sigma_(2p_(Z))^()` `pi_(2p_(x))` `pi_(2p_(y))^()` Solution :`SIGMA^() 1s , sigma _(2p_(z))^()and pi_(2p_(x))`have ONE nodal plane each WHEREAS` pi_(2p_(y))^()`has TWO nodal planes

Discussion

43.	Molecular orbitals are formed by the overlap of atomic orbitals. Two atomic orbitals combine atom from two molecular orbitals called vonding molecular orbital (BOM) and anti bonding molecular orbital (ABMO). Energy of anti bonding orbital is raised above the parent atomic orbitals that have combined and the energy of the bonding orbital is lowered than the parent atomic orbitals. Energies of various molecular orbitals for elements hydrogen to nitrogne increase in the order : sigma_(1s)ltsigma_(1s)^()ltsigma_(2s)ltsigma_(2s)^()lt(pi_(2py)~~pi_(2py))lt sigma_(2py)lt(pi_(2py)^()~~pi_(2py)^())ltsigma_(2pz)^() and for ozygen and fluorine order of energy of molecular orbitals id given below : sigma_(1s)ltsigma_(1s)^()ltsigma_(2s)ltsigma_(2s)^()ltsigma_(2pz)lt(pi _(2px)^()~~pi_(2py)^())sigma_(2pz)^() Different atomic orbitals of one atom combine wiht the atomic orbitals of the second atom whihc have comparable energies and proper orientation. Further, if the overlapping is head on, the molecular orbital is called 'Sigma' (sigma) and if the overlap is atreal, the molecular orbital is called 'pi', (pi). The molecular orbitals are filled with electrons according to the same rules as followed for filling of atomic orbitals. However, the order for filling is not the same for all molecules or their ions, Bond order is one the most ipmrtaint parameters to compare the strength of bonds. Which of the following molecular orbital has maximum number of nodal planes ?
Answer» `sigma_(1s)^()` `sigma_(2pz)^()` `pi_(2px)` `pi_(2PY)^()` SOLUTION :NODAL PLANES are : `sigma_(1s)^()("one"),sigma_(2pz)^()("one"),pi_(2px)("one"),pi_(2py)^()("two").`

Discussion

44.	Molecular orbitals are formed by the overlap of atomic orbitals . Two atomic orbitals combine to form two molecular orbitals, called Bonding Molecular Orbital (BMO) and Anti - Bonding Molecular Orbital (ABMO). Different atomic orbitals of one atom combine with those atomic orbitals of the second atom which have comparable energles and proper orientationFurther, if overlapping is head on, the molecular orbitals is called 'sigma' and if the overlap is lateral, the molecular orbital is called 'pi' . The molecular orbitals are filled with electrons following the same rules as followed for filling of atomic orbitals . However, the order of filling in not the same for of the most important parameter to compare a number of their characteristics Whihc one of the following statements is corrects ?
Answer» BMO is lowered by the greater amount of energy than the amount by which ABMO is raised BMO is lowered by greater amount of energy than the amount by which ABMO is raised . BMO is lowered by less amount of energy than the amount by which ABMO is raised. Any ONE of the above is POSSIBLE . Solution :ABMO is raised more in energy than the energy by which BMO are lowered as COMPARED to the energy of combining ATOMIC ORBITALS .

Discussion

45.	Molecular orbitals are formed by the overlap of atomic orbitals. Two atomic orbitals combine atom from two molecular orbitals called vonding molecular orbital (BOM) and anti bonding molecular orbital (ABMO). Energy of anti bonding orbital is raised above the parent atomic orbitals that have combined and the energy of the bonding orbital is lowered than the parent atomic orbitals. Energies of various molecular orbitals for elements hydrogen to nitrogne increase in the order : sigma_(1s)ltsigma_(1s)^()ltsigma_(2s)ltsigma_(2s)^()lt(pi_(2py)~~pi_(2py))lt sigma_(2py)lt(pi_(2py)^()~~pi_(2py)^())ltsigma_(2pz)^() and for ozygen and fluorine order of energy of molecular orbitals id given below : sigma_(1s)ltsigma_(1s)^()ltsigma_(2s)ltsigma_(2s)^()ltsigma_(2pz)lt(pi _(2px)^()~~pi_(2py)^())sigma_(2pz)^() Different atomic orbitals of one atom combine wiht the atomic orbitals of the second atom whihc have comparable energies and proper orientation. Further, if the overlapping is head on, the molecular orbital is called 'Sigma' (sigma) and if the overlap is atreal, the molecular orbital is called 'pi', (pi). The molecular orbitals are filled with electrons according to the same rules as followed for filling of atomic orbitals. However, the order for filling is not the same for all molecules or their ions, Bond order is one the most ipmrtaint parameters to compare the strength of bonds. In which of the following molecules sigma_(2pz) molecular orbital is filled after pi _(2px)and pi_(2py) molecular orbitals ?
Answer» `O_(2)` `Ne_(2)` `N_(2)` `F_(2)` SOLUTION :Is the CORRECT ANSWER. For details consult SECTION 4.32

Discussion

46.	Molecular orbitals are
Answer» Monocentric Bicentric Połycentric NONE ANSWER :C

Discussion

47.	Molecular mass of phosphoric acid is a 98 gm/mol state Atomic mass of 'P'.
Answer» <P> SOLUTION :`H_(3)PO_(4)= 98` gm/mol `:.(3H)+1(P)+4(O)=98` `:.3(1)+1(P)+4(16)=98` `:.3+P+64=98` `:.67+P=98` `:.P=98-67=31` gm/mol `:. P=31` gm/mol

Discussion

48.	Molecular orbital theory was proposed by
Answer» LEWIS Muliken Slater PAULING ANSWER :B

Discussion

49.	Molecular mass of SrF_2, is 125.6. Solubility of SrF, in water is 1.2 xx 10^(-2) g L^(-1). Calculate the solubility product of SrF_2
Answer» SOLUTION :`3.48 XX 10^(-12)`

Discussion

50.	Molecular mass of liquid ammonia is les than that of liquid hydrogen chloride. But hydrogen chloride is more volatile. Why ?
Answer» Solution :Inter molecular forces in ammonia are HYDROGEN bonds. In liquid hydrogen CHLORIDE, the forces of ATTRACTION are dipole-dipole forces. Thees FORCESARE relatively weak. Hence VOLATILITY is more.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Moratar is a mixture of

Monovalent cations having stable electronic configurations similar to the

Monomer in silicone is

monohalogenation Q. Which halogen will give the best yield of the monohalogenation product?

Monoclinic crystal has dimension

Monocarbonyl compounds have very small percentage enol form at equilibrium . Explains.

monoatomicanion of unitchargecontains45neutrons and36electrons. What is theatomicmas of the elementand inwhichgroup of theperiodictabledoes it lie ?

Mond process is for the purification of

Moltensodiumis usedin nuclearreactorsto ______.

Molten sodium chloride conducts electricity due to the presence of

Moltenaluminium bromide ispoor conductor of electricity. Explain.

Moles of KHC_(2)O_(4) (potassiumacid oxalate) required to reduce 100 mL of 0.02M KMnO_(4) in acidic medium (to Mn^(2+)) is

Molecules with sp^(2) hybridisation will have the followig shape

Molecules of liquid hydrogenchloride are held with

Molecules of a gas are considered as point groups. What does this signify?

Molecules having the least RMS velocity at constant temperature are

Molecules having distorted tetrahedral geometry are-

The molecule having zero dipole moment is

Molecule with dipole moment among the following

Molecule which contains 4 bond pairs and 2 lone pairs of electrons on the central atom is

What is Eltonian pyramid?

Molecule is the smallest particle of a substance which is capable of..........

Molecule having an incomplete octet in the central atom is

Molecular weights of ammonia and nitrogen are respectively X_(1) and X_(2). In the reaction of producing ammonia.N_(2)+3H_(2)to2NH_(3) , the equivalent weights ofammoniaand nitrogen are given as respectively y_(1) and y_(2). Then how is (y_(1)-y_(2)) related to molecular weights?

Molecular weight of Mohr.s salt is 392. Its equivalent weight when it is oxidised by KMnO_(4) in acidic medium is

Molecular weight of orthophosphoric acid is M. Its equivalent weight is

Molecular weight of Mohr's salt is 392. Its equivalent weight when it is oxidised by KMnO_4 in acidic medium is

Molecular weight of Mohr's salt is 392. Its equivalent weight when it is oxidised by KMnO, in acidic medium is

Molecular weight of KMnO_(4) is "M". In a reaction KMnO_(4) is reduced to KMnO_(4). The equivalent weight of KMnO, is

Molecular weight of a gas is 44. The volume occupied by 2.2 grams of the gas under STP is

Molecular weight of a gas, 11.2 litres of which at NTP weighs 14 g, is

Molecular weight of a dibasic acid is 132. If 33 grams of acid is present in 400ml solution, calculate molarity and normality

Molecular shapes ofSF_(4), CF_(4), XeFe_(4)are

Molecular orbitals are

Molecular mass of phosphoric acid is a 98 gm/mol state Atomic mass of 'P'.

Molecular orbital theory was proposed by

Molecular mass of SrF_2, is 125.6. Solubility of SrF, in water is 1.2 xx 10^(-2) g L^(-1). Calculate the solubility product of SrF_2

Molecular mass of liquid ammonia is les than that of liquid hydrogen chloride. But hydrogen chloride is more volatile. Why ?