94420 + Interview Questions in Chemistry in Class 12 Page 1830 InterviewSolution

91451.	(A) Ammonia is least volatile among MH_(3) type hydrides of group VA elements. (R ) Molecules of ammonia are held together by strong electrostatic forces
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 (A) and (R ) are false Answer :4

Discussion

91452.	(A) Among 15^(th) group elements nitrogen has the least B.P where as Bi has the high B.P than N. (R ) Nitrogen is a non metal where as Bi is a metal
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 (A) and (R ) are false ANSWER :2

Discussion

91453.	(A) Ammonia can be dried over conc. H_(2)SO_(4) (R ) Conc. H_(2)SO_(4) has more affinity to waterthan to ammonia
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 (A) and (R ) are false Answer :4

Discussion

91454.	Aamineproduces yellowoilycompoundon reactionwithnitrousacid . It isprobably a
Answer» Primaryamine Secondaryamine TERTIARYAMINE Quarternarysalt ANSWER :B

Discussion

91455.	(A) Aluminium metal is used as a reducing agentin thermite welding (R) Al has a lower meltingpoint than Fe, Cr and Mn.
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 explanationof (A) (A) is true but (R) is false Both (A) and (R) are false Answer :B

Discussion

91456.	A: Aluminium metal is used as a reducing agent for the extraction of metals R: Aluminium has great affinity for oxygen
Answer» If both Assertion & Reason are true and the reason is the CORRECT EXPLANATION of the assertion, then mark (1). If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2) If Assertion is true statement but Reason is false, then mark If both Assertion and Reason are false STATEMENTS, then mark (4) Answer :A

Discussion

91457.	(A) Aluminium metal can be extracted by the electrolysis of aqueous aluminium fluoride (R) The reduction potentialof standard aluminium electrode is positive
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 EXPLANATIONOF (A) (A) is true but (R) is false Both (A) and (R) are false Answer :D

Discussion

91458.	(A) Alumina is leached from bauxite using caustic soda (R) Leaching is used when ore alone, but not gangue is soluble in a suitablesolvent.
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 EXPLANATIONOF (A) (A) is true but (R) is false Both (A) and (R) are false Answer :C

Discussion

91459.	Find out the correct statement from the following: (a) Alum is potassium aluminium sulphate (b) Alum is extrated form colemanite ( c ) Anhydrous aluminium chloride a catalyst in Friedels crafts reactions. (d) It’s a Lewis acid
Answer» ANSWER :B

Discussion

91460.	(A) : PF_(5),PCl_(5) and PBr_(3) are known, the pentahalides of nitrogen have not been observed (R ) Phosphorous has lower electronegativity than nitrogen.
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 (A) and (R ) are false ANSWER :2

Discussion

91461.	(A) Although fluorine is more electronegative than chlorine, yet p-fluorobenzoic acid is a weaker acid than p-chlorobenzoic acid. (R) Due to matching sizes of 2p orbitals of F and carbon, F has a stronger +R effect than Cl.
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 (A) and (R) are false Answer :A

Discussion

91462.	(A) Although fluorine is more electronega-tiye than oxygen, but the ability of oxygen to stabilise the higher oxidation states with d- block metal is more. (R) Oxygen has ability to form multiple bonds to metals
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 (A) and (R) are false Solution :Both (A) and (R) are true and (R) is the correct explanation of (A)

Discussion

91463.	(A) alpha-Hydrogen atoms in aldehdes and ketones are acidic. (R) The anion left after the removal of alpha-hydrogen from carbonly compounds is stabilized by the electron withdrawing carbonyl group.
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 (A) and (R) is false Answer :C

Discussion

91464.	(A) All types of magnetic solids become paramagnetic at elevated temperatures. (R) Magnetic solids on heating attains randomisation of spins
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 (A) and (R) are false Answer :A

Discussion

91465.	A : All the oxides of boron family with the general formula M_(2) O_(3) are basic . R : From B_(2) O_(3) to Tl_(2) O_(3) basic character decreases .
Answer» If both Assertion & REASON are true and the reason is the correct explanation of the assertion , then mark (1) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion , then mark (2) If Assertion is true statement but Reason is false , then mark (3) If both Assertion and Reason are false STATEMENTS , then mark (4) Answer :D

Discussion

91466.	(A) All the noble gases have ns^2 np^6 electronic configuration in their outermost shell(R) In noble gases all the energy levels are completely filled.
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 (A) and (R) are false Answer :D

Discussion

91467.	(A) All the hydrogen atoms in but-2-ene lie in one plane. (R) All the carbon atoms in it are sp^(2)-hybridized.
Answer» ANSWER :D

Discussion

91468.	(A): All square planar complexes can exhibit geometrical isomerism (R): In square planar complexes metal generally assumes dsp^2 hybrid state.
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 Answer :D

Discussion

91469.	(A) All noble gases occur in atmosphere(R) Among noble gases 'R' is radioactive element
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 (A) and (R) are false Answer :B

Discussion

91470.	(A): All noble gases are monoatomic (R): Noble gas atom is stable and does not dimerise or polymerise
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 (A) and (R) are false Answer :A

Discussion

91471.	(A) All instantaneous reactions are spontaneous (R ) Spontaneous recations get completed in a fraction of minute
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 (A) and (R ) are false Answer :C

Discussion

91472.	(A): All hormones are proteins (R): All hormone receptors are proteins
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 Answer :D

Discussion

91473.	(A) All Ionic reactions are Instantaneous (R ) Ionic reactions do not involve bond rearrangements
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 (A) and (R ) are false Answer :A

Discussion

91474.	(A): All DNA and RNA molecules contain adenine, guanine and cytosine base molecules (R): Adenine, guanine and cytosine molecules are examples of the same base type
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 Answer :C

Discussion

91475.	A : All crystals of same substance possess the same elements of symmetry.R : The size of crystal of same substance may vary depending upon the conditions of crystallisation.
Answer» If both Assertion & REASON are true and the reason is the CORRECT explanation of the assertion then mark (1) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2) If Assertion is true statement but Reason is false then mark (3) If both Assertion and Reason are false statements, then mark (4) ANSWER :B

Discussion

91476.	(A) All covalent solids are non conductors(R) Graphite is a ionic solid
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 (A) and (R) are false Answer :D

Discussion

91477.	A: All Cr-o bond length in K_(2)Cr_(2)O_(7) are equalR: Both the Cr are present in dsp^(2) hybrid state
Answer» If both Assertion & REASON are true and the reason is the CORRECT explanation of the assertion, then mark (1) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2) If Assertion is true statement but Reason is false, then mark (3) If both Assertion and Reason are false statements, then mark (4) Answer :D

Discussion

91478.	(A) All compounds having C=C bond exhibit geometrical isomerism. (R) Rotation about C=C bond is restricted.
Answer» ANSWER :D

Discussion

91479.	(A) All collisions lead to chemical reaction (R ) All molecules bring about effective collisions
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 (A) and (R ) are false Answer :D

Discussion

91480.	(A): Alkyl halides on reaction with KCN, the major product is nitrile, but with AgCN, the major product is isonitrile. (R): Mainly KCN is more ionic, but AgCN is more covalent than KCN.
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 Answer :A

Discussion

91481.	A alkene that provides only Butanone -2 on ozonolysis is
Answer» 3, 4-dimethylhex-3-ene 2,3-dimethylhex-2-ene 3-methylhex-3-ene 2,3-dimethylpent-2-ene Answer :A

Discussion

91482.	(A) Alkanes containing more than three carbons exhibit chain isomerism. (R) All the carbon atoms in alkanes are sp^(3)-hybridized.
Answer» ANSWER :C

Discussion

91483.	(A) Alkaline hydrolysis of ethyl acetate follows first order kinetic (R ) Rate= K [ester] for saponification reactions
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 (A) and (R ) are false Answer :D

Discussion

91484.	(A) Alkanes can have an infinite number of conformations. (R) In configurational isomerism, the isomers are distinct individual substances.
Answer» ANSWER :B

Discussion

91485.	(A) Aldehydes on reaction with hydroyxl amine to form aldoximes. (R) Aldoximes exhibit geometrical isomerism.
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 (A) and (R) is false Answer :B

Discussion

91486.	(A) Aldol condensation of acetone can be catalysed both by acid (or) base. (R) beta-Hydroxyaldehyde readily undergo acid-catalysed dehydration.
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 (A) and (R) is false Answer :B

Discussion

91487.	(A) Aldehydes are reduced to alkanes in the presence of Zn/Hg and Conc. HCl. (R) In Wolff-Kishner reduction reagent used is NH_(2)NH_(2) and KOH in glycol.
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 (A) and (R) is false Answer :B

Discussion

91488.	(A) Aldehydes & ketones on shaking with a saturated solution of NaHSO_(3) gives solid derivative of sodium bisulphite compounds. (R) Carbonyl compounds on heating with NaCN gives cyanohydrins.
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 (A) and (R) is false Answer :B

Discussion

91489.	(A): Alcohols on dehydration can produce ether as well as alkene under different conditions. (R): Dehydration of alcohol takes place with conc. H_(2)SO_(4) or Al_(2)O_(3).
Answer» Both A & Rare true, R is the CORRECT explanation of A Both A & Rare true, R is not correct explanation of A A is true, R is FALSE A is false, R is true Answer :B

Discussion

91490.	(A) Alcohols can act as nucleophiles(R) Alcohols form salts with alkali metals
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 (A) and (R) are false Answer :B

Discussion

91491.	(A) Alcohols can be dried over anhydrous CaCl_(2) (R ) Anhydrous CaCl_(2) absorbs moisture of aqueous ethyl alcohol.
Answer» If both (A) and (R ) are CORRECT and (R ) is correct EXPLANATION of (A ). If both (A ) and (R ) are correct but (R ) is not correct explanation of (A ). If (A) is correct but (R ) is INCORRECT If (A) is incorrect but (R ) is correct. ANSWER :D

Discussion

91492.	(A) Alcohols are acidic in nature but donot react with NaOH solution(R) Alkoxide is stronger base than hydroxide 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 the correct explanation of (A) (A) is true but (R) is false Both (A) and (R) are false Answer :A

Discussion

91493.	(A) Alcohols act as Bronsted - Lowry bases.(R) In alcohols the lone pair of electrons on oxygen forms dative bond by accepting a proton
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 (A) and (R) are false Answer :A

Discussion

91494.	What is addition polymerization? Give one example for a copolymer.
Answer» Solution :POLYMERIZATION during which large NUMBER of same (or) DIFFERENT monomers contains one or more double BONDS add together to give a polymer is called addition polymerization. Example for co polymer is Buna-s It is addition polymerization in which the polymer is made up of large number of two different monomer UNITS Eg :- Buna-s it is prepared by the co-polymersiation of 1,3 - butadiene and styrene

Discussion

91495.	(A): Alcoholic fermentation involves conversion of sugar into ethanol by the action of yeast. (R): Fermentation involves the liberation of CO_(2) gas.
Answer» Both A & RARE TRUE, R is the CORRECT EXPLANATION of A Both A & Rare true, R is not correct explanation of A A is true, R is false A is false, R is true Answer :B

Discussion

91496.	(a) Al_(2)O_(3) is treated with Co(NO_(3))_(2) (b) Ammonium alum is heated (c) Metastannic acid is heated (d) SnCls is treated with Sn (e) Nitrous oxide (N_(2)O) is treated with sodamide.
Answer» SOLUTION :(a) ` 2Co(NO_(3))_(2) RARR 2CoO 4NO_(2) +O_(2)` CoO + `Al_(2)O_(3) rarr CoAl_(2)O_(4)` (B) ` (NH_(4))SO_(4)Al(SO_(4))_(3) .24H_(2)O rarr (NH_(4))HSO_(4) + Al_(2)(SO_(4))_(3) + 24H_(2)O` (C) ` H_(2)Sn_(5)O_(4)4H_(2)O rarr 5SnO_(2) + 5H_(2)O` (d) `SnCl_(4) + Sn rarr 2SnCl_(2)` ` N_(2)O + NaNH_(2) rarr NaN_(3) + NH_(3) + NaOH` sodium azide is formed.

Discussion

91497.	A : Al forms [AIF_6]^(3-) but B does not form [BF_6]^(3-) R : B does not react with fluorine.
Answer» a B c d Solution :B does not have VACANT d-orbitals (sub-SHELL) as its VALENCE shell.

Discussion

91498.	A: AI_(2)(CH_(3))_(6) is a dimeric compound and has Similar structure to diborane. R: AI_(2)(CH_(3))_(6) in a sigma bonded complex
Answer» If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2). ) If Assertion is true STATEMENT but Reason is false, then mark (3). If both Assertion and Reason are false statements, then mark (4) Answer :B

Discussion

91499.	(a) Adsorption of a gas on the surface of solid is generally accompanied by a decrease in entropy. Still it is a spontaneous process. Explain. (b) How does an increase in temperature affect both physical as well as chemical adsorption?
Answer» SOLUTION : (a) ACCORDING to the equation `DELTAG=DeltaH_T DeltaS ` For a process to be spontaneous, `DeltaG` should be negative.` DELTAH` of adsorption is always negative. For a gas, `DeltaS` is also negative. Thus, in an adsorption process, which is spontaneous, a combination of these two factors always makes `DeltaG` negative. (b) On increasing the temperature desorption occurs in case of physical adsorption. CHEMICAL adsorption first increases and then decreases with increase in temperature.

Discussion

91500.	(A) Adsorption is endothermic (R ) Adsorption process is accormpanied by increase in randomness
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 (A) and (R ) are false ANSWER :D

Discussion

Explore topic-wise InterviewSolutions in .

(A) Ammonia is least volatile among MH_(3) type hydrides of group VA elements. (R ) Molecules of ammonia are held together by strong electrostatic forces

(A) Among 15^(th) group elements nitrogen has the least B.P where as Bi has the high B.P than N. (R ) Nitrogen is a non metal where as Bi is a metal

(A) Ammonia can be dried over conc. H_(2)SO_(4) (R ) Conc. H_(2)SO_(4) has more affinity to waterthan to ammonia

Aamineproduces yellowoilycompoundon reactionwithnitrousacid . It isprobably a

(A) Aluminium metal is used as a reducing agentin thermite welding (R) Al has a lower meltingpoint than Fe, Cr and Mn.

A: Aluminium metal is used as a reducing agent for the extraction of metals R: Aluminium has great affinity for oxygen

(A) Aluminium metal can be extracted by the electrolysis of aqueous aluminium fluoride (R) The reduction potentialof standard aluminium electrode is positive

(A) Alumina is leached from bauxite using caustic soda (R) Leaching is used when ore alone, but not gangue is soluble in a suitablesolvent.

Find out the correct statement from the following: (a) Alum is potassium aluminium sulphate (b) Alum is extrated form colemanite ( c ) Anhydrous aluminium chloride a catalyst in Friedels crafts reactions. (d) It’s a Lewis acid

(A) : PF_(5),PCl_(5) and PBr_(3) are known, the pentahalides of nitrogen have not been observed (R ) Phosphorous has lower electronegativity than nitrogen.

(A) Although fluorine is more electronegative than chlorine, yet p-fluorobenzoic acid is a weaker acid than p-chlorobenzoic acid. (R) Due to matching sizes of 2p orbitals of F and carbon, F has a stronger +R effect than Cl.

(A) Although fluorine is more electronega-tiye than oxygen, but the ability of oxygen to stabilise the higher oxidation states with d- block metal is more. (R) Oxygen has ability to form multiple bonds to metals

(A) alpha-Hydrogen atoms in aldehdes and ketones are acidic. (R) The anion left after the removal of alpha-hydrogen from carbonly compounds is stabilized by the electron withdrawing carbonyl group.

(A) All types of magnetic solids become paramagnetic at elevated temperatures. (R) Magnetic solids on heating attains randomisation of spins

A : All the oxides of boron family with the general formula M_(2) O_(3) are basic . R : From B_(2) O_(3) to Tl_(2) O_(3) basic character decreases .

(A) All the noble gases have ns^2 np^6 electronic configuration in their outermost shell(R) In noble gases all the energy levels are completely filled.

(A) All the hydrogen atoms in but-2-ene lie in one plane. (R) All the carbon atoms in it are sp^(2)-hybridized.

(A): All square planar complexes can exhibit geometrical isomerism (R): In square planar complexes metal generally assumes dsp^2 hybrid state.

(A) All noble gases occur in atmosphere(R) Among noble gases 'R' is radioactive element

(A): All noble gases are monoatomic (R): Noble gas atom is stable and does not dimerise or polymerise

(A) All instantaneous reactions are spontaneous (R ) Spontaneous recations get completed in a fraction of minute

(A): All hormones are proteins (R): All hormone receptors are proteins

(A) All Ionic reactions are Instantaneous (R ) Ionic reactions do not involve bond rearrangements

(A): All DNA and RNA molecules contain adenine, guanine and cytosine base molecules (R): Adenine, guanine and cytosine molecules are examples of the same base type

A : All crystals of same substance possess the same elements of symmetry.R : The size of crystal of same substance may vary depending upon the conditions of crystallisation.

(A) All covalent solids are non conductors(R) Graphite is a ionic solid

A: All Cr-o bond length in K_(2)Cr_(2)O_(7) are equalR: Both the Cr are present in dsp^(2) hybrid state

(A) All compounds having C=C bond exhibit geometrical isomerism. (R) Rotation about C=C bond is restricted.

(A) All collisions lead to chemical reaction (R ) All molecules bring about effective collisions

(A): Alkyl halides on reaction with KCN, the major product is nitrile, but with AgCN, the major product is isonitrile. (R): Mainly KCN is more ionic, but AgCN is more covalent than KCN.

A alkene that provides only Butanone -2 on ozonolysis is

(A) Alkanes containing more than three carbons exhibit chain isomerism. (R) All the carbon atoms in alkanes are sp^(3)-hybridized.

(A) Alkaline hydrolysis of ethyl acetate follows first order kinetic (R ) Rate= K [ester] for saponification reactions

(A) Alkanes can have an infinite number of conformations. (R) In configurational isomerism, the isomers are distinct individual substances.

(A) Aldehydes on reaction with hydroyxl amine to form aldoximes. (R) Aldoximes exhibit geometrical isomerism.

(A) Aldol condensation of acetone can be catalysed both by acid (or) base. (R) beta-Hydroxyaldehyde readily undergo acid-catalysed dehydration.

(A) Aldehydes are reduced to alkanes in the presence of Zn/Hg and Conc. HCl. (R) In Wolff-Kishner reduction reagent used is NH_(2)NH_(2) and KOH in glycol.

(A) Aldehydes & ketones on shaking with a saturated solution of NaHSO_(3) gives solid derivative of sodium bisulphite compounds. (R) Carbonyl compounds on heating with NaCN gives cyanohydrins.

(A): Alcohols on dehydration can produce ether as well as alkene under different conditions. (R): Dehydration of alcohol takes place with conc. H_(2)SO_(4) or Al_(2)O_(3).

(A) Alcohols can act as nucleophiles(R) Alcohols form salts with alkali metals

(A) Alcohols can be dried over anhydrous CaCl_(2) (R ) Anhydrous CaCl_(2) absorbs moisture of aqueous ethyl alcohol.

(A) Alcohols are acidic in nature but donot react with NaOH solution(R) Alkoxide is stronger base than hydroxide ion

(A) Alcohols act as Bronsted - Lowry bases.(R) In alcohols the lone pair of electrons on oxygen forms dative bond by accepting a proton

What is addition polymerization? Give one example for a copolymer.

(A): Alcoholic fermentation involves conversion of sugar into ethanol by the action of yeast. (R): Fermentation involves the liberation of CO_(2) gas.

(a) Al_(2)O_(3) is treated with Co(NO_(3))_(2) (b) Ammonium alum is heated (c) Metastannic acid is heated (d) SnCls is treated with Sn (e) Nitrous oxide (N_(2)O) is treated with sodamide.

A : Al forms [AIF_6]^(3-) but B does not form [BF_6]^(3-) R : B does not react with fluorine.

A: AI_(2)(CH_(3))_(6) is a dimeric compound and has Similar structure to diborane. R: AI_(2)(CH_(3))_(6) in a sigma bonded complex

(a) Adsorption of a gas on the surface of solid is generally accompanied by a decrease in entropy. Still it is a spontaneous process. Explain. (b) How does an increase in temperature affect both physical as well as chemical adsorption?

(A) Adsorption is endothermic (R ) Adsorption process is accormpanied by increase in randomness