94420 + Interview Questions in Chemistry in Class 12

1.	Assertion(A):Tertiary butyl alcohol is more reactive towards dehydration in compariso to primary alcohol. Reason: Secondary carbonium ion is more stable than primary carbonium ion.
Answer» ANSWER :B

Discussion

2.	Assertion:At equilibrium , vapour phase will be always rich in component which is more volatile Reason : The composition of vapour phase in equilibrium with the solution is determined by the partial pressures of the components
Answer» If both ASSERTION and reason are TRUE and reason is the CORRECT explanation of assertion If both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is false If both assertion and reason are false ANSWER :A

Discussion

3.	Assertion:Aryl halides are less reactive towards substitution of halogen atom. Reason : Halogens are o,p-directing in nature
Answer» If both assertion and reason are true and the reason is the CORRECT explanation of the assertion If both assertion and reason are true butreason is not the correct explanation of the assertion if assertion is true but reason is false If assertion and reason both are false Solution :Arylhalide shows resonance STABILIZATION and thus RESISTANT to substitution REACTION

Discussion

4.	Assertion:Aqueous solution of urea is ideal. Reason: Ideal solutions can not follow Raoult's law.
Answer» Both Assertion and Reason are TRUE and Reason is the correct EXPLANATION of Assertion Both Assertion and Reason are true and Reason is not the correct explanation of Assertion Assertion is true but Reason is FALSE Both Assertion and Reason are false Answer :D

Discussion

5.	Assertion(A):Propene reacts with perbenzoic acid to form 1,2-epoxy propane. Reason: Perbenzoic acid contains a pereoxide linkage (O-O) in its molecule.
Answer» ANSWER :B

Discussion

6.	Assertion:Alkyl benzene is not prepared by Friedel-Crafts alkylation of benzene . Reason:Alkyl halides are less reactive than acyl halides
Answer» If both assertion and reason are true and the reason is the correct explanation of the assertion If both assertion and reason are true butreason is not the correct explanation of the assertion if assertion is true but reason is false If assertion and reason both are false Solution :The alkyl BENZENE is not prepared by FRIEDEL -Craft's alkylation of benzene because the monoalkyl product formed UNDERGO alkylation to produce polyalkylated benzene . The reason the alkyl HALIDES are less reactive than acylhalides is ALSO correct but this is not the correct explanation of assertion

Discussion

7.	Assertion(A):In Kolbe's electrolytic carboxylation reaction if there are n carbon atoms in the parent compound, the alkane produced will have(n-1)carbon atoms. Reason: Kolbe's electrolytic decarboxylation reaction can also be employed for producing ethene and ethyne.
Answer» ANSWER :D

Discussion

8.	Assertion(A):Ethene is more reative than propene towards electrophilic attack. Reason: Propyne is stablised by hyperconjugation effect.
Answer» ANSWER :D

Discussion

9.	Assertion(A):Ethyne reacts with NH_(3) to form pyrrole. Reason: Pyrrole is a heterocyclic aromatic comopound.
Answer» ANSWER :B

Discussion

10.	Assertion:Addition of salt decreases the freezing point of water. Reason: When salt is added to water, the equilibrium between water and ice is disturbed as fewer water molecules reach the surface of the ice in a given time and so water freezes slowly
Answer» Both Assertion and REASON are true and Reason is the CORRECT EXPLANATION of Assertion Both Assertion and Reason are true and Reason is not the correct explanation of Assertion Assertion is true but Reason is FALSE Both Assertion and Reason are false ANSWER :A

Discussion

11.	Assertion:Addition of HBr on 2-butene gives two isomeric products . Reason:Addition of HBr on 2-butene follows Markownikov's rule
Answer» If both ASSERTION and reason are true and the reason is the correct explanation of the assertion If both assertion and reason are true butreason is not the correct explanation of the assertion if assertion is true but reason is false If the assertion and reason both are false Solution :Addition involve carbocation intermediate thus RACEMIC mixture is obtained

Discussion

12.	Assertion:Addition of Br_2 to 1-butene gives two optical isomers. Reason:The product contains one asymmetric carbon
Answer» Both assertion and reason are CORRECT and reason is the correct explanation of the assertion Both assertion and reason are correct but reason is notthe correct explanation of the assertion Assertion is correct, but reason is INCORRECT Assertion is incorrect, but reason is correct SOLUTION :Both assertion and reason are correct and reason is the correct explanation of the assertion

Discussion

13.	Assertion(A):Cyclobutane is less stable than cyclopentane. Reason: The bond angles in cyclobutane and cyclopentane are 90^(@) and 108^(@)respectively and angel strain decreases.
Answer» ANSWER :A

Discussion

14.	Assertion(A):Butane-2 is more stable than butene-1. Butene-2 has 6H-C bonds while butene-1 has 2H-C bonds.
Answer» ANSWER :C

Discussion

15.	Assertion(A):But-2-yne on treatment with Na//NH_(3)(l) produces trans-2-butene. Reason: In but-yne all the atoms are linear.
Answer» ANSWER :C

Discussion

16.	Assertion(A):Both toluene and isopropyl benzene give the same product on oxidation with KMnO_(4). Reason KMnO_(4) oxidises side aliphatic chain of arenes to -COOH group
Answer» ANSWER :A

Discussion

17.	Assertion(A):Both cyclopropane and propene give addition reactions readiky. . Reason Cyclopropane and propene are isomers of each other.
Answer» ANSWER :B

Discussion

18.	Assertion(A):Boron -10 isotopes is used as moderate in nuclear reactors. Reason(R):Boron has the capacity to absorb neutrons.
Answer» (a) A and R are CORRECT and R explains A. (B) A and R are correct and R not explains A. (C) A is correct but R is WRONG. (d) A is wrong but R is correct. Answer :A

Discussion

19.	Assertion(A):Amines posses pyramidal geometry. Reason®: Nitrogen atoms of aminesis trivalent and has four sp^(3) hybridised orbital. Three sp^(3) orbitals overlap with orbitals of hydrogen and four sp^(3) orbitals contain a lone pair of electrons.
Answer» Both A and R are CORRECT and r is explains A Both A and R but R is WRONG A is correct but R is wrong A is wrong but R is correct Answer :A

Discussion

20.	Assertion(A):Benzene and Cl_(2) reactin the presence of light to give BHC. Reason: BHC is called gammexene or 666
Answer» ANSWER :B

Discussion

21.	Assertion(A):Acetylene and sodamide react to give dihydrogen gas. Reason: Acetylene is a very very feeble acid.
Answer» ANSWER :D

Discussion

22.	Assertion(A):2-nitro propane is more acidic than nitro methane. Reason (R):When the number of alkyl group attached to alpha carbon increases, acidity decreases. Due to +I effect of alkyl groups.
Answer» Both A and R are CORRECT and r is explains A Both A and R but R is WRONG A is correct but R is wrong A is wrong but R is correct Answer :D

Discussion

23.	Assertion(A):2-Bromobutane on reaction with sodium ethoxide. In ethanol gives 1-butene as a major product. Reason: 1-Butene is more stable than-2-butene
Answer» ANSWER :E

Discussion

24.	Assertion(A) - When two uncharged similar atoms are brought very close together, their surrounding electron clouds influence each other, and a force of attraction is always built up between them. Reason(R)-The random variation in the positions of electrons around one nucleus may create a transient electric dipole, which induces a transient opposite electric dipole in the nearby atoms.
Answer» Both A and R TRUE and R is the CORRECT EXPLANATION of A Both A and R true and R is not acorrect explanation of A A is true but R is FALSE A is false but R is true Answer :D

Discussion

25.	Assertion(A) - Water is speClally effective in screening the electrostatic interactions between the dissolved ions. Reason(R)-The force of ionic interactions depends upon the dielectric constant (in) of the solvent.
Answer» Both A and R TRUE and R is the CORRECT EXPLANATION of A Both A and R true and R is not acorrect explanation of A A is true but R is FALSE A is false but R is true Answer :A

Discussion

26.	Assertion(A): Trichloro acetic acid is more acidic than acetic acid. Reason (R): Cl - is a electron withdrawing group and acidity increases with increasing number of electron withdrawing substituents on the alpha- carbon. (a) Both A and R are correct and R is the correct
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 correct explanation of A A is correct but R is WRONG A is wrong but R is correct Answer :A

Discussion

27.	Assertion(A): The pressence of a catalyst increases the speed of the forward and backward reactions to the same extent. Reason(R): Activation energy for both the forward and backward reactions is lowered to same extent.
Answer» If both (A) and (R) are CORRECT, and (R) is the correct explanation of (A) If both (A) and (R) are correct, but (R) is the correct explanation of (A). If (A) is correct, but (R) is incorrect. If (A) is incorrect, but (R) is correct. S Solution :CATALYST does not CHANGE the equilibrium point.

Discussion

28.	Assertion(A) - The nearly tetrahedral arrangement of the orbitals about the oxygen atom allows each water molecule to form hydrogen bonds with as many as four neighbouring water molecules. Reason(R)-In ice each water molecule forms four hydrogen bonds as each molecule is fixed in the space.
Answer» Both A and R TRUE and R is the CORRECT EXPLANATION of A Both A and R true and R is not acorrect explanation of A A is true but R is FALSE A is false but R is true Answer :A

Discussion

29.	Assertion(A): Transparent soaps are made by dissolving soaps in ethanol. Reason (R): Ethanol made things invisible.
Answer» Both A and R are CORRECT and R explains A. Both A and R are correct but R does not EXPLAIN A. A is correct but R is wrong. A is wrong but R is correct. Answer :C

Discussion

30.	Assertion(A) : Total number of octahedral voids present in unit cell of cubic close packing including the one that is present at the body centre, is four. Reason ( R) : Besides the body centre there is one octahedral void present at the centre of each of the six faces of the unit cell and each of which is shared between two adjacent unit cells.
Answer» (A) and ( R) both are CORRECT statements and ( R) is correct EXPLANATION for (A). (A) and ( R) both are correct statements but ( R) is not correct explanation for (A). (A) is correct STATEMENT but ( R) is wrong statement. (A) is wrong statement but ( R) is correct statement. Answer :C

Discussion

31.	Assertion(A): The mass of nickle catalyst recovered after being used in the hydroenation of an oil is less than the mass of nickle added to the reaction. Reason(R): Catalyst take part in the reaction but the are recoveres in the end.
Answer» If both (A) and (R) are CORRECT, and (R) is the correct EXPLANATION of (A) If both (A) and (R) are correct, but (R) is the correct explanation of (A). If (A) is correct, but (R) is INCORRECT. If (A) is incorrect, but (R) is correct. S Solution :N//A

Discussion

32.	Assertion(A): The drugs acts as an inhibitor to the enzyme catalyst. Reason (R): A drug molecule that has a similar geometry (shape) as the substrate is administered, it can also bind to the enzyme and inhibit its activity
Answer» Both A and R are correct and R EXPLAINS A. Both A and R are correct but R does not EXPLAIN A. A is correct but R is WRONG. A is wrong but R is correct. Answer :A

Discussion

33.	Assertion(A) - The bond angle around PBr_3 is larger than that in PH_3 but bond angle of NB r_3 is less than that of NH_3 Reason(R ) : Atomic size of Br is smaller than that P atom because of larger nuclear charge
Answer» Both A and R TRUE and R is the correct explanation of A Both A and R true and R is not acorrect explanation of A A is true but R is false A is false but R is true Answer :C

Discussion

34.	Assertion(A): The bond angle (C-O-H) in methanol is reduced to 108.9^@ from the regular tetra hedral bond angle of 109.5^@. Reason (R): In methanol, two one pairs of electrons are present in oxygen atom and due to lone pair - lone pair repulsion, the bond angle is reduced.
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

35.	Assertion(A): The boiling point of aldehydes and ketones are much lower those of corresponding alcohols and carboxylic acids. Reason (R): Alcohols and carboxylic acids possess intermolecular hydrogen bonding and so have high boiling point.
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 correct explanation of A A is correct but R is WRONG A is wrong but R is correct ANSWER :B

Discussion

36.	Assertion(A): Sulphur dioxide and sulphites are also used as food additive. Reason (R): They act as antimicrobial agents, antioxidant and enzyme inhibitors.
Answer» Both A and R are CORRECT but R does not EXPLAINS A. Both A and R are correct and R explains A. A is correct but R is WRONG. A is wrong but R is correct. Answer :B

Discussion

37.	Assertion(A): Sucrose is called invert sugar. Reason (R): During hydrolysis of sucrose, the optical rotation of the reaction mixture changesfrom dextro to levo.
Answer» Both A and R are CORRECT and RIS 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

38.	Assertion(A) : Semiconductors are solids with conductivities in the intermediate range from (10^(-6)-10^(4)ohm^(-1)*m^(-1)). Reason ( R) : Intermediate conductivity in semiconductor is due to partially filled valence band.
Answer» (A) and ( R) both are correct statements and ( R) is correct EXPLANATION for (A). (A) and ( R) both are correct statements but ( R) is not correct explanation for (A). (A) is correct STATEMENT but ( R) is WRONG statement. (A) is wrong statement but ( R) is correct statement. Answer :C

Discussion

39.	Assertion(A): Sodium chloride is added to precipitate soap after saponification. Reason (R): Hydrolysis of esters of long chain fatty acids by alkali produces soap in colloidal form.
Answer» Both A and R are CORRECT and R explains A. Both A and R are correct but R does not explain A. A is correct but R is WRONG. A is wrong but R is correct Answer :A

Discussion

40.	Assertion(A): Saccharin, sucralose are artificial sweeteners. Reason (R): Synthetic compounds which imprint a sweet sensation and possess no or negligible nutritional value are called artificial sweeteners.
Answer» Both A and R are correct and R does not explains A. Both A and R are correct and R explains A. A is correct but R is WRONG. A is wrong but R is correct Answer :B

Discussion

41.	Assertion(A): Reduction of crotonaldehyde is preferbaly carried in the presence of LiAlH_(4). Reason(R): LiAlH_(4) does not reduce carbon-carbon double bond in the carbonyl compound.
Answer» (A) and (R) are TRUE and (R) is the correct EXPLANATION of (A). Both (A) and (R) are true but (R) does not EXPLAIN (A) (A) is true but (R) is false Both (A) and (R) are false ANSWER :A

Discussion

42.	Assertion(A): Procaine and Lidocaine are local anaesthetics and cause loss of sensation in the area in which it is applied without losing consciousness. Reason (R): They block pain perception that is transmitted via peripheral nerve fibres to the brain.
Answer» Both A and R are CORRECT and R EXPLAINS A. Both A and R are correct but R does not EXPLAIN A. A is correct but R is WRONG. A is wrong but R is correct. Answer :A

Discussion

43.	Assertion(A): Primary and secondary nitroalkanes show an equilibrium mixture of two tautomers namely niotro and aci form Reason (R):Both primary and secondary nitroalkanes are having alpha H atoms.
Answer» Both A and R are CORRECT and r is EXPLAINS A Both A and R but R is wrong A is correct but R is wrong A is wrong but R is correct Answer :A

Discussion

44.	Assertion(A): Primary alcohols are more acidic than tertiary alcohol. Reason (R): Alkyl groups (electron releasing group) increases the electron density on oxygenand decreases the polar nature of- OH bond. Hence it results in the decrease in acidity.
Answer» Both A and R are correct and R is the CORREET EXPLANATION of A. Both A and R are not correct 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 correet explanation of A.

Discussion

45.	Assertion(A): Phenols are soluble in alcohols. Reason (R): Phenols are soluble in alcohol due to the formation of inter molecular hydrogen bonding.
Answer» Both A and R are CORRECT and R is the correet explanation of A. Both A and R are WRONG 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 correet explanation of A.

Discussion

46.	Assertion(A): Phenol is more reactive towards electrophilic substitution reaction. Reason (R): In the case of phenol. the intermediate carbo cations is more resonance stabilized.
Answer» Both A and R are CORRECT and R is the CORREET explanation of A. Both A and R are wrong 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 correet explanation of A.

Discussion

47.	Assertion(A): Phenol is more acidic than ethanol. Reason (R): Phenoxide ion is more stable than ethoxide due to resonance.
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

48.	Assertion(A) : Pentan -2-ol and pentan-3-ol are both secondary alcohols. Reason(R) : Both give blue colouration with Victor Meyer's test
Answer» (A) and (R) are true and (R) is the correct EXPLANATION of (A). Both (A) and (R) are true but (R) does not explain (A) (A) is true but (R) is false Both (A) and (R) are false ANSWER :B

Discussion

49.	Assertion(A): Phenol is insoluble in NaHCO_3 solution but acetic acid is soluble. Reason (R): Phenols are weakly acidic and hence they dissolve only in strong base and insoluble in weak base like NaHCO_3 But acetic acid is a stronger acid than phenol and so it is soluble in weak base NaHCO_3.
Answer» Both A and R are correct and R is the CORREET EXPLANATION of A. Both A and are correct but R is not the correct explanation of A.s Both A and R are wrong A is correct but R is wrong SOLUTION :Both A and R are correct and R is the correet explanation of A.

Discussion

50.	Assertion(A): Phenol forms 2,4. 6 - tribromo phenol on treatment with Br_2" in "CS_2 at 273 K. Reason (R): Bromine polarizes in CS_2.
Answer» Both A and R are CORRECT and R is the correct EXPLANATION of A. Both A and are incorrect Ais correct but R is WRONG A is wrong but R is correct Solution :Both A and are incorrect

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

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

Assertion:At equilibrium , vapour phase will be always rich in component which is more volatile Reason : The composition of vapour phase in equilibrium with the solution is determined by the partial pressures of the components

Assertion:Aryl halides are less reactive towards substitution of halogen atom. Reason : Halogens are o,p-directing in nature

Assertion:Aqueous solution of urea is ideal. Reason: Ideal solutions can not follow Raoult's law.

Assertion(A):Propene reacts with perbenzoic acid to form 1,2-epoxy propane. Reason: Perbenzoic acid contains a pereoxide linkage (O-O) in its molecule.

Assertion:Alkyl benzene is not prepared by Friedel-Crafts alkylation of benzene . Reason:Alkyl halides are less reactive than acyl halides

Assertion(A):In Kolbe's electrolytic carboxylation reaction if there are n carbon atoms in the parent compound, the alkane produced will have(n-1)carbon atoms. Reason: Kolbe's electrolytic decarboxylation reaction can also be employed for producing ethene and ethyne.

Assertion(A):Ethene is more reative than propene towards electrophilic attack. Reason: Propyne is stablised by hyperconjugation effect.

Assertion(A):Ethyne reacts with NH_(3) to form pyrrole. Reason: Pyrrole is a heterocyclic aromatic comopound.

Assertion:Addition of salt decreases the freezing point of water. Reason: When salt is added to water, the equilibrium between water and ice is disturbed as fewer water molecules reach the surface of the ice in a given time and so water freezes slowly

Assertion:Addition of HBr on 2-butene gives two isomeric products . Reason:Addition of HBr on 2-butene follows Markownikov's rule

Assertion:Addition of Br_2 to 1-butene gives two optical isomers. Reason:The product contains one asymmetric carbon

Assertion(A):Cyclobutane is less stable than cyclopentane. Reason: The bond angles in cyclobutane and cyclopentane are 90^(@) and 108^(@)respectively and angel strain decreases.

Assertion(A):Butane-2 is more stable than butene-1. Butene-2 has 6H-C bonds while butene-1 has 2H-C bonds.

Assertion(A):But-2-yne on treatment with Na//NH_(3)(l) produces trans-2-butene. Reason: In but-yne all the atoms are linear.

Assertion(A):Both toluene and isopropyl benzene give the same product on oxidation with KMnO_(4). Reason KMnO_(4) oxidises side aliphatic chain of arenes to -COOH group

Assertion(A):Both cyclopropane and propene give addition reactions readiky. . Reason Cyclopropane and propene are isomers of each other.

Assertion(A):Boron -10 isotopes is used as moderate in nuclear reactors. Reason(R):Boron has the capacity to absorb neutrons.

Assertion(A):Amines posses pyramidal geometry. Reason®: Nitrogen atoms of aminesis trivalent and has four sp^(3) hybridised orbital. Three sp^(3) orbitals overlap with orbitals of hydrogen and four sp^(3) orbitals contain a lone pair of electrons.

Assertion(A):Benzene and Cl_(2) reactin the presence of light to give BHC. Reason: BHC is called gammexene or 666

Assertion(A):Acetylene and sodamide react to give dihydrogen gas. Reason: Acetylene is a very very feeble acid.

Assertion(A):2-nitro propane is more acidic than nitro methane. Reason (R):When the number of alkyl group attached to alpha carbon increases, acidity decreases. Due to +I effect of alkyl groups.

Assertion(A):2-Bromobutane on reaction with sodium ethoxide. In ethanol gives 1-butene as a major product. Reason: 1-Butene is more stable than-2-butene

Assertion(A) - Water is speClally effective in screening the electrostatic interactions between the dissolved ions. Reason(R)-The force of ionic interactions depends upon the dielectric constant (in) of the solvent.

Assertion(A): Trichloro acetic acid is more acidic than acetic acid. Reason (R): Cl - is a electron withdrawing group and acidity increases with increasing number of electron withdrawing substituents on the alpha- carbon. (a) Both A and R are correct and R is the correct

Assertion(A): The pressence of a catalyst increases the speed of the forward and backward reactions to the same extent. Reason(R): Activation energy for both the forward and backward reactions is lowered to same extent.

Assertion(A) - The nearly tetrahedral arrangement of the orbitals about the oxygen atom allows each water molecule to form hydrogen bonds with as many as four neighbouring water molecules. Reason(R)-In ice each water molecule forms four hydrogen bonds as each molecule is fixed in the space.

Assertion(A): Transparent soaps are made by dissolving soaps in ethanol. Reason (R): Ethanol made things invisible.

Assertion(A): The mass of nickle catalyst recovered after being used in the hydroenation of an oil is less than the mass of nickle added to the reaction. Reason(R): Catalyst take part in the reaction but the are recoveres in the end.

Assertion(A): The drugs acts as an inhibitor to the enzyme catalyst. Reason (R): A drug molecule that has a similar geometry (shape) as the substrate is administered, it can also bind to the enzyme and inhibit its activity

Assertion(A) - The bond angle around PBr_3 is larger than that in PH_3 but bond angle of NB r_3 is less than that of NH_3 Reason(R ) : Atomic size of Br is smaller than that P atom because of larger nuclear charge

Assertion(A): The bond angle (C-O-H) in methanol is reduced to 108.9^@ from the regular tetra hedral bond angle of 109.5^@. Reason (R): In methanol, two one pairs of electrons are present in oxygen atom and due to lone pair - lone pair repulsion, the bond angle is reduced.

Assertion(A): The boiling point of aldehydes and ketones are much lower those of corresponding alcohols and carboxylic acids. Reason (R): Alcohols and carboxylic acids possess intermolecular hydrogen bonding and so have high boiling point.

Assertion(A): Sulphur dioxide and sulphites are also used as food additive. Reason (R): They act as antimicrobial agents, antioxidant and enzyme inhibitors.

Assertion(A): Sucrose is called invert sugar. Reason (R): During hydrolysis of sucrose, the optical rotation of the reaction mixture changesfrom dextro to levo.

Assertion(A) : Semiconductors are solids with conductivities in the intermediate range from (10^(-6)-10^(4)ohm^(-1)*m^(-1)). Reason ( R) : Intermediate conductivity in semiconductor is due to partially filled valence band.

Assertion(A): Sodium chloride is added to precipitate soap after saponification. Reason (R): Hydrolysis of esters of long chain fatty acids by alkali produces soap in colloidal form.

Assertion(A): Saccharin, sucralose are artificial sweeteners. Reason (R): Synthetic compounds which imprint a sweet sensation and possess no or negligible nutritional value are called artificial sweeteners.

Assertion(A): Reduction of crotonaldehyde is preferbaly carried in the presence of LiAlH_(4). Reason(R): LiAlH_(4) does not reduce carbon-carbon double bond in the carbonyl compound.

Assertion(A): Procaine and Lidocaine are local anaesthetics and cause loss of sensation in the area in which it is applied without losing consciousness. Reason (R): They block pain perception that is transmitted via peripheral nerve fibres to the brain.

Assertion(A): Primary and secondary nitroalkanes show an equilibrium mixture of two tautomers namely niotro and aci form Reason (R):Both primary and secondary nitroalkanes are having alpha H atoms.

Assertion(A): Primary alcohols are more acidic than tertiary alcohol. Reason (R): Alkyl groups (electron releasing group) increases the electron density on oxygenand decreases the polar nature of- OH bond. Hence it results in the decrease in acidity.

Assertion(A): Phenols are soluble in alcohols. Reason (R): Phenols are soluble in alcohol due to the formation of inter molecular hydrogen bonding.

Assertion(A): Phenol is more reactive towards electrophilic substitution reaction. Reason (R): In the case of phenol. the intermediate carbo cations is more resonance stabilized.

Assertion(A): Phenol is more acidic than ethanol. Reason (R): Phenoxide ion is more stable than ethoxide due to resonance.

Assertion(A) : Pentan -2-ol and pentan-3-ol are both secondary alcohols. Reason(R) : Both give blue colouration with Victor Meyer's test

Assertion(A): Phenol is insoluble in NaHCO_3 solution but acetic acid is soluble. Reason (R): Phenols are weakly acidic and hence they dissolve only in strong base and insoluble in weak base like NaHCO_3 But acetic acid is a stronger acid than phenol and so it is soluble in weak base NaHCO_3.

Assertion(A): Phenol forms 2,4. 6 - tribromo phenol on treatment with Br_2" in "CS_2 at 273 K. Reason (R): Bromine polarizes in CS_2.