94420 + Interview Questions in Chemistry in Class 12

1.	Assertion :Ce^(4+) is used as anoxidizingagentin volumetricanalysis . Reson: Ce^(4+) has thetendency ofattaining+ 3oxidationstate.
Answer» Bothassertionandreasonare trueand REASONIS the correctexplanationof ASSERTION Bothassertionandreasontruereasonis notthe correctexplanationofassertion Assertion is truebutreasonis false . Bothassertionandreasonarefalse. ANSWER :A

Discussion

2.	Assertion: Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent. Reason: Oxidising agent oxidises I_(2) into HI.
Answer» ASSERTION and reason both are CORRECT and reason is correct explanation of assertion. Assertion and reason both are wrong statements. Assertion is correct but reason is wrong statement. Assertion is wrong but reason is correct statement. Solution :Correct reason. Oxidising AGENT oxidises HI to `I_(2)`.

Discussion

3.	Assertion : Cellulose is not digested by human beings. Reason : Cellulose is a polymer of beta-D glucose.
Answer» If both assertion and REASON are true , and is the true EXPLANATION of the assertion. If both assertion and reason are true, but reason is not the true explanation of the assertion. If asseration is true , but reason is FALSE. If both assertion and reason are false. Solution :Correct Explanation : Enzymes which hydrolyse `beta`-GLYCOSIDIC linkages are not present in human digestive SYSTEM.

Discussion

4.	Assertion : (CH_(3))_(3)C-Br and CH_(3)CH_(2)O"N"a react to form (CH_(3))_(3)C-O-CH_(2)CH_(3) Reason : Good yields of ethers are obtained when tertalkyl halides are treatedwith alkoxides .
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 but reason 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 :`(CH_(3))_(3)CONa and CH_(3)CH_(2)Br` REACT to form `(CH_(3))_(3)C-O_CH_(2)CH_(3),` GOOD yields of ETHERS are obtained when primary alkyl halides are TREATED with alkoxides derived from any alcohol. `1^(@),2^(@)` or `3^(@)`.

Discussion

5.	Assertion : Artificial sweeteners are added to the food to control the intake of calories. Reason: Most of the artificial sweeteners are inert and do not metabolise in the body.
Answer» ASSERTION and reason both are CORRECT statement but reason does not explain assertion Assertion and reason both are correct and reason explains the assertion Both assertion and reason are WRONG statement Assertion is correct statement reason is wrong statement Solution :Reason is the correct EXPLANATION of assertion.

Discussion

6.	Assertion: CH_(3)-CH=CH_(2)overset(Cl_(2),773K)toCl-CH_(2)-CH=CH_(2)+HCl Reason: At high temperature, Cl_(2) dissociates into chlorine free radicals which bring about allylic substitutioin.
Answer» If both ASSERTION and REASON are CORRECT and reason is correct EXPLANATION for assertion If both assertion and reason are correct but reason is not correct explanation for assertion. If assertion is correct but reason is incorrect. if both assertion and reason are incorrect. Solution :Reason is the correct explanation for assertion.

Discussion

7.	Assertion: Ce^(4+) is used as an oxidizing agent in volumetric analysis. Reason: Ce^(4+) has the tendency of attaining +3 oxidation state.
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 true and reason is the correct explanation of assertion

Discussion

8.	Assertion :- Arteries are non-collapsable Reason :- Wall of arteries are thick and more muscular.
Answer» If both ASSERTION & Reason are TRUE & the Reason is a CORRECT EXPLANATION of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion. If Assertion is True but the Reason is False. If both Assertion & Reason are False Answer :A

Discussion

9.	Assertion Cations of both Cu(II) group and Fe(III) group are precipitated by passing H_(2)S gas but former in dilute acidic medium while later in dilute alkaline medium. Reason Sulphides of Cu(II) group cations have lower solubility than that of Fe(III) group cations.
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 not the correct explanation of assertion Assertion is correct but reason is incorrect Assertion is incorrect but reason is correct Answer :A

Discussion

10.	Assertion : Aromatic aldehydes and ketones undergo electrophilic substitution reaction at metaposition. Reason : Carbonyl group activates the ring towards electrophilic substitution reactions.
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. Solution :CARBONYL group is DEACTIVATING group.

Discussion

11.	Assertion : Ce^(4+) is used as an oxidizing agent in volumetric analysis. Reason : Ce^(4+) has the tendency of attaining +3 oxidation state.
Answer» Both assertion and reason are true and reason is the CORRECT explanation of assertion. Both assertion and reason and 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 true and reason is the correct explanation of assertion.

Discussion

12.	Assertion : Aromatic aldehydes and formaldehyde undergo Cannizzaro reaction. Reason : Those aldehydes which have alpha-H atom undergo Cannizzaro reaction.
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. Solution :Aldehydes with no `alpha`-H ATOMS, undergo Cannizzaro REACTION.

Discussion

13.	Assertion: Aromatic aldehydes and formaldehyde undergo Cannizzaro reaction. Reason: Aromatic aldehydes are almost as reactive as formaldehyde.
Answer» Assertion and reason both are CORRECT and reason is correct EXPLANATION of assertion. Assertion and reason both are WRONG statement. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Solution :Correct reason. Formaldehyde and aromatic aldehydes do not CONTAIN `alpha`-HYDROGEN.

Discussion

14.	Assertion [A]:Rate constants determined from arrhenius equation are fairly accurate for simple as well as complex molecule. Reason [R]:Reactant molecules undergo chemical change irrespective of their orientation during collision
Answer» Both ASSERTION [A] and reason [R] are CORRECT and the reason [R] is correct EXPLANATION of assertion [A]. Both assertion [A] and reason [R] are correct but reason [R] does not explain assertion [A] Assertion [A] is correct but reason [R] is correct Assertion [A] is incrorrect but reason [R] is correct. Answer :C

Discussion

15.	Assertion: Aromatic 1^(@) amines can be prepared by Gabriel Phthalimide Synthesis. Reason: Aryl halides undergo nucleophilic substitution with anion formed by phthalimide.
Answer» Both assertion and reason are wrong. Both assertion and reason are correct STATEMENTS but reason is not correct explanation of assertion. Assertion is correct statement but reason is wrong statement. Both assertion and reason are correct statements and reason is correct explanation of assertion. Solution :Correct assertion. Aromatic primary AMINES cannot be PREPARED by Gabriel PHTHALIMIDE synthesis. Correct reason. Aryl halides do not undergo nucleophilic substitution with ANION formed by phthalimide.

Discussion

16.	Assertion. Aqueous gold colloidal solution is red in colour. Reason. The colour arises due to scattering of light by colloidal gold particles.
Answer» If both assertion and reason are ture, and reason is the trure explanation of the assertion. If both assertion and reason are true, but reason is not the true explanation of the assertion. If assertion is true, but reason is false. If both assertion and reason false. SOLUTION :The colur is due to scattering . It depends upon to size of particles. Finest gold sol has red colour. At the size of the particles INCREASES, it BECOMES PURPLE than blue and finally golden YELLOW.

Discussion

17.	Assertion: Aquated copper(I) cation undergoes disproportionation as: 2Cu^(+)(aq) to Cu^(2+)(aq)+Cu Reason: Hydration energy of Cu^(2+) is higher than that of Cu^(+) which compensates second ionisation energy of Cu.
Answer» If both ASSERTION and REASON are true and the reason is the CORRECT explanation of assertion If both assertion and reason are true and the reason is not the correct explanation of assertion If assertion is FALSE but reason is true If assertion is true but the reason is false Answer :A

Discussion

18.	Assertion [A]:Order of the reaction can be zero or fractional. Reason [R]:We cannot determine order from balanced chemical equation.
Answer» Both assertion [A] and REASON [R] are CORRECT and the reason [R] is correct explanation of assertion [A]. Both assertion [A] and reason [R] are correct but reason [R] does not explain assertion [A] Assertion [A] is correct but reason [R] is correct Assertion [A] is incrorrect but reason [R] is correct. Answer :B

Discussion

19.	Assertion [A]:Order and molecularity are same. Reason [R]:Order is determined experimentally and molecularity is the sum of the stoichiometric coefficient of rate determining elementary step.
Answer» Both ASSERTION [A] and reason [R] are correct and the reason [R] is correct explanation of assertion [A]. Both assertion [A] and reason [R] are correct but reason [R] does not EXPLAIN assertion [A] Assertion [A] is correct but reason [R] is correct Assertion [A] is incrorrect but reason [R] is correct.

Discussion

20.	Assertion : Antioxidants retard the oxidative deteriorations of food Reason : Antioxidants readily undergo reduction by reacting with free radicals.
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 :C

Discussion

21.	Assertion: Antioxidants inhibits free radical reactions. Reason: Tertiary butyl hydroquinone is an antioxidant.
Answer» Both A and R and true and R is the CORRECT expalantion 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

22.	Assertion : Anilinium chloride is more acidic towards electrophilic substitutionthan ammonium chloride. reaction.Reason : Anilinium chloride is resonancestabilised
Answer» if both ASSERTION and REASON are true and reason is thr CORRECT explanationof 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 reson are false. Solution :Aniline is weake base than ammonium chloride. In `NH_4 Cl` or alophatic AMINES, then non- bonding electronpair of N is localised and is fully available for coordination with a proton, `UNDERSET(("stronger acid " )("weaker-conjugate base "))(C_6H_5HH_3^oplusrarrC_6H_5NH_2+H` On the other hand, in aniline and other aromatic amines, the non-bonding ring by resonasce. But anilinium ion is less resonance stabilised than anilinc

Discussion

23.	Assertion: Anilinium chloride is more acidic than ammonium chloride. Reason: Anilinium ion is resonance stabilized.
Answer» If both assertion and reason are true, and reason is the true explanation of the assertion. If both assertion and reason are ture, but reason is not the true explanation of the assertion. If assertion is true, but reason is false. If both assertion and reason are false. Solution :Correct reason: Since AMMONIA is a STRONGER base than aniline, therefore, the CONJUGATE acid of aniline, i.e., anilinum CHLORIDE is more acidic than conjugate acid of ammonia, i.e., AMMONIUM chloride.

Discussion

24.	Assertion : Aniline is better nucleophile than anilium ion. Reason : Anilium ion have +ve charge.
Answer» Assertionis CORRECT, reason is correct, reason is a correct EXPLANATION for assertion. Assertionis correct, reason is correct, reasonis not a correct explanation for assertion Assertionis correct, reasonis incorrect Assertion is incorrect, reasonis correct. Solution : Benzene has a uniform C – C bond distance of 139 pm, a value intermediate between the C– C SINGLE. (154 pm) and C = C double (134 pm) bonds.

Discussion

25.	Assertion: Anion vacancies in alkali halides are produced by heating the alkali halide crystals with alkali metal vapour. Reason: Electrons trapped in anion vacancies are referred to as F -centres.
Answer» If both assertion and reason are true and the reason is the correct explanantion of the assertion If both assertion and reason are true but reason 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 :On HEATING , the metal atoms deposit on the surface and finally they deffuse into the crystal and after ionisation the alkali metal ion occupies CATIONIC VACANCY where as ELECTRON occupies anionic vacancy.

Discussion

26.	Assertion: Aniline does not undergo Friedel Crafts reaction. Reason : Friedel Crafts reaction is an electrophilic substiution reaction.
Answer» Assertion and REASON both are both wrong statements . Assertion is correct STATEMENT but reason is wrong statement Assertion is wrongstatement but reason is correct statement Assertion and reason both are correct statements but REASSON is not correct explanation of assertion ANSWER :B

Discussion

27.	Assertion: Aniline hydrogen sulphate on heating forms a mixture of ortho and para aminobenzene sulphonic acids. Reason: The sulphonic acid group is electron withdrawing.
Answer» ANSWER :D

Discussion

28.	Assertion: Aniline does not undergo Friedel-Crafts reaction. Reason: Friedel-Crafts is an electrophilic substitution reaction
Answer» If both assertion and reason are true, and reason is the true explanation of the assertion. If both assertion and reason are ture, but reason is not the true explanation of the assertion. If assertion is true, but reason is false. If both assertion and reason are false. Solution :Correct explanation. `AlCl_(3)` forms a salt with ANILINE `(C_(6)H_(5)NH_(2)^(+)AlCl_(3)^(-))` which deactivates the benzene ring THEREBY preventing F.C. reaction.

Discussion

29.	Assertion: Anhydrous BaO_(2)is used for preparing H_(2)O_(2). Reason : Hydrated BaO_(2) is not available.
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 but reason is nto the correct exaplation of the assertion If assertion is true but reason is false If the assertion and reason both are false Solution :Anhydrous `BaO_(2)` is not USED for preparing `H_(2)O_(2)` because it reacts with `H_(2)SO_(4)` and the reaction ceases after some time due to formation of `BaSO_(4)` on `BaO_(2)`. Therefore, assertion and reason both are false.

Discussion

30.	Assertion. Analgesics bring down the body temperature during high fever. Reason. Penicillin is a tranquilliser.
Answer» If both assertion and reason are TRUE, and reason is the true EXPLANATION of the assertion. If both assertion and reason are true, but reason is not the true explanation of the assertion. If assertion is true, but reason is false If both assertion and reason are false. Solution :Correct assertion. Analgesics are used for getting RELIEF from pain. Correct reason. PENICILLIN is an antibiotic.

Discussion

31.	Assertion : An ordinary filter paper impreganted with collodion solution stops the flow of colloidal particles. Reason : Pore size of the filter paper beeomes more than the size of colloidal particle.
Answer» Assertion and reason both are correct and the reason is correct explanation of assertion. Assertion and reason both are correct but reason does not expolain assertion. Assertion is correct but reason is INCORRECT. Both assertion and reason are incorrect. Solution :Correct Reason. Pore SIZE of the filter paper BECOMES smiller than the size of the colloidal particles.

Discussion

32.	Assertion : An ionic product is used for any types of electrolytes whereas solubility product is applicable only ro sparingly soluble salts. Reason : Ionic product is defined at any stage of the reaction whereas solubility product is only applicable to the saturation stage.
Answer» If both assertion and reason are TRUE and reason is the CORRECT EXPLANATION of the assertion If both assertion and reason are true but reason 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 :For SPARINGLY soluble salts, reason is not a correct explanation. Hence both assertion and reason are true but reason is not a correct explanation of assertion.

Discussion

33.	Assertion :- An increase in surface area increases the rate of evaporation. Reason :- Stronger the inter-molecular attractive forces, fast is the rate of evaporation at a given temperature.
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 but reason is not the correct explanation of the assertion. If assertion is true but reason is false. If the assertion and reason both are false. Answer :C

Discussion

34.	Assertion : An example of K-capture is ._(56)^(133)Ba + e^(-) rarr ._(55)^(133)Cs + X-ray. Reason : The atomic number decreases by one unit as result of K-capture
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 but reason is not the correct explanantion of the assertion If assertion is true but reason is false If the assertion and reason both are false Solution :In some nuclides, the nucleus MAY capture an electron from the K--shell and the VACANCY created is filled by electrons from higher levels giving rise to CHARACTERISTIC X-rays. This PROCESS is known as K-electron capture or simply K-capture.

Discussion

35.	Assertion: an electrochemical cell can be set up only if the redox reaction is spontaneous. Reason: A reaction is spontaneous if free energy change is negative.
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 but reason 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 :If REDOX reaction is spontaneous, `DeltaG` is -ve and HENCE `E^(@)` is POSITIVE. `-DeltaG^(@)=NFE^(@)` cell.

Discussion

36.	Assertion : An aqueous solution of ferric chloride is acidic due to hydrolysis. Reason : Ferric chloride is a covalent compound and exists as a dimer.
Answer» If both ASSERTION and reason are CORRECT and reason is correct explanation for assertion. If both assertion and reason are correct but reason is not correct not correct explanation for assertion. If assertion is correct but reason is incorrect. If both assertion and reason are incorrect. Solution :(b) Correct explanation. Upon HYDROLYSIS, ferric chloride forms ferric hydroxide (WEAK base) and hydrochloric acid (STRONG acid).

Discussion

37.	Assertion : Amylase in the presence of sodium choride i.e., Na^(+) ions catalytically very active. Reason : Metal ions such as Na^(+), Mn^(2+) , Co^(2+) , Cu^(2+),etc. act as activitors.
Answer» If both assertion and reason are TRUE and reasonis 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 Solution :Metal ions when WEAKLY bonded to enzyme molecules increase their catalytic activity.

Discussion

38.	Assertion :- Amount of charge on hydrophobic sol is greater than hydrophilic sol. Reason :- Lyophobic sol is inorganic substance lycophilic sol is organic substance.
Answer» If both Assertion & REASON are TRUE & the Reason is a correct EXPLANATION of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are False. Answer :B

Discussion

39.	Assertion: Among the halogens bond energy of F_(2) is minimum. Reason: Among halogens F atom is small in size.
Answer» If both ASSERTION and reason are TRUE ANND the 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 the reason is false if assertion is false but the reason is true Answer :D

Discussion

40.	Assertion: Ammonolysis of alkyl halides invovles the reaction between alkyl halides and alcoholic ammonia. Reason: Reaction can be used to prepare only 2^(@) amines.
Answer» If both ASSERTION and reason are TRUE and the reason is the correct explanantion of the assertion. If both assertion and reason are true but reason is not the correct explanantion of the assertion. If assertion is true but reason is false. If the assertion and reason both are false. Solution :Reaction can be used to prepare `1^(@),2^(@),3^(@)` amines and FINALLY QUARTERNARY ammonium salts.

Discussion

41.	Assertion: Ammonolysis of alkyl halides involves reaction between alkyl halides and alcoholic ammonia. Reason: Ammonolysis of alkyl halides mainly produces 2^(@) amines.
Answer» ANSWER :C

Discussion

42.	Assertion Ammonia has higher critical temperature than CO_(2) Reason Ammonia forms intermolecular hydrogen bonds while CO_(2) does not.
Answer» ANSWER :a

Discussion

43.	Assertion : Amino acids are soluble in benzene and ether Reason: Amino acids exist as zwitter ion.
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 but reason is not the corret explanation of the assertion. If assertion is true but reason is false. If the assertion and the reason both are false. Solution :Amino acids are soluble in polar SOLVENTS LIKE `H_(2)O`, NAOH and HCl and insoluble in non-polar solvents like benzene , ether etc.

Discussion

44.	Assertion: Amines are more basic than esters and ethers Reason: Nitrogen is less electronegative than oxygen. It is in better position to accommodate the positive charge on the proton.
Answer» ANSWER :A

Discussion

45.	Assertion: Amines are basic in nature. Reason: Presence of ione pair of electron on nitrogenatom.
Answer» SOLUTION :Amines are basic due to the PRESENCE of a LONE pair of electrons on NITROGEN atom. The lone pair can be EASILY dounated.

Discussion

46.	Assertion.Aluminothermy is used forextractionofchromiumfrom chromiumoxide. Reason.Aluminareactswith carbonto fromaluminiumcarbidewhich decomposes at hightemperatureto from Al whilecarbonisoxidisedto CO.
Answer» Ifbothassertionandreasonaretrue, andreason is NOTTHE trueexplanationofthe ASSERTION. Ifbothassertionandreasonaretrue,butreasonis notthetrueexplanationoftheassertion. Ifassertionis true,butreason isfalse If bothassertionandreasonarefalse Solution :CORRECTEXPLANATION.` Delta_ rG ^(@)`of` Al _2 O_3`is morenegativethat of` Cr_ 2 O_3`.

Discussion

47.	Assertion: Alums are crystalline double salts, which are soluble in water. Reason: The eq.solutions of alums have acidic character due to hydrolysis
Answer» If both ASSERTION and reason are TRUE and the reason is the correct explanation of assertion If both assertion and reason are true and the reason is not the correct explanation of assertion If assertion is false but reason is true If assertion is true but the reason is false Solution :ALUMS are `M._(2)(SO_(4))M_(2)..(SO_(4))_(3).24H_(2)O` These are SOLUBLE in water. Their aqueuos solution are acid in nature both the statements are true but it is not the correct explanation.

Discussion

48.	Assertion : Aluminothermic process is the extraction of chromium from chromic oxide. Reason : Alumina has a high melting point.
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 :B

Discussion

49.	Assertion : Aluminium metal is used as a reducing agent for the extraction of metals. Reason : Aluminium has great affinity for oxygen.
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

50.	Assertion: Although fluorine is more electronegative than chlorine, yet p-flurobenzoic acid is a weaker acid than p-chlorobenzoic acid. Reason: Due to matching sizes of 2p-orbitals of F and carbon, F has a stronger +R-effect than Cl.
Answer» if both ASSERTION and RESON are TRUE, and REASON is the true EXPLANATION of the assertion. If both assertion and reason are true, but reason is not the true explanation of the assertion. if assertion is true, but reason is false. If both assertion and reason are false. Answer :A

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Assertion :Ce^(4+) is used as anoxidizingagentin volumetricanalysis . Reson: Ce^(4+) has thetendency ofattaining+ 3oxidationstate.

Assertion: Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent. Reason: Oxidising agent oxidises I_(2) into HI.

Assertion : Cellulose is not digested by human beings. Reason : Cellulose is a polymer of beta-D glucose.

Assertion : (CH_(3))_(3)C-Br and CH_(3)CH_(2)O"N"a react to form (CH_(3))_(3)C-O-CH_(2)CH_(3) Reason : Good yields of ethers are obtained when tertalkyl halides are treatedwith alkoxides .

Assertion : Artificial sweeteners are added to the food to control the intake of calories. Reason: Most of the artificial sweeteners are inert and do not metabolise in the body.

Assertion: CH_(3)-CH=CH_(2)overset(Cl_(2),773K)toCl-CH_(2)-CH=CH_(2)+HCl Reason: At high temperature, Cl_(2) dissociates into chlorine free radicals which bring about allylic substitutioin.

Assertion: Ce^(4+) is used as an oxidizing agent in volumetric analysis. Reason: Ce^(4+) has the tendency of attaining +3 oxidation state.

Assertion :- Arteries are non-collapsable Reason :- Wall of arteries are thick and more muscular.

Assertion Cations of both Cu(II) group and Fe(III) group are precipitated by passing H_(2)S gas but former in dilute acidic medium while later in dilute alkaline medium. Reason Sulphides of Cu(II) group cations have lower solubility than that of Fe(III) group cations.

Assertion : Aromatic aldehydes and ketones undergo electrophilic substitution reaction at metaposition. Reason : Carbonyl group activates the ring towards electrophilic substitution reactions.

Assertion : Ce^(4+) is used as an oxidizing agent in volumetric analysis. Reason : Ce^(4+) has the tendency of attaining +3 oxidation state.

Assertion : Aromatic aldehydes and formaldehyde undergo Cannizzaro reaction. Reason : Those aldehydes which have alpha-H atom undergo Cannizzaro reaction.

Assertion: Aromatic aldehydes and formaldehyde undergo Cannizzaro reaction. Reason: Aromatic aldehydes are almost as reactive as formaldehyde.

Assertion [A]:Rate constants determined from arrhenius equation are fairly accurate for simple as well as complex molecule. Reason [R]:Reactant molecules undergo chemical change irrespective of their orientation during collision

Assertion: Aromatic 1^(@) amines can be prepared by Gabriel Phthalimide Synthesis. Reason: Aryl halides undergo nucleophilic substitution with anion formed by phthalimide.

Assertion. Aqueous gold colloidal solution is red in colour. Reason. The colour arises due to scattering of light by colloidal gold particles.

Assertion: Aquated copper(I) cation undergoes disproportionation as: 2Cu^(+)(aq) to Cu^(2+)(aq)+Cu Reason: Hydration energy of Cu^(2+) is higher than that of Cu^(+) which compensates second ionisation energy of Cu.

Assertion [A]:Order of the reaction can be zero or fractional. Reason [R]:We cannot determine order from balanced chemical equation.

Assertion [A]:Order and molecularity are same. Reason [R]:Order is determined experimentally and molecularity is the sum of the stoichiometric coefficient of rate determining elementary step.

Assertion : Antioxidants retard the oxidative deteriorations of food Reason : Antioxidants readily undergo reduction by reacting with free radicals.

Assertion: Antioxidants inhibits free radical reactions. Reason: Tertiary butyl hydroquinone is an antioxidant.

Assertion : Anilinium chloride is more acidic towards electrophilic substitutionthan ammonium chloride. reaction.Reason : Anilinium chloride is resonancestabilised

Assertion: Anilinium chloride is more acidic than ammonium chloride. Reason: Anilinium ion is resonance stabilized.

Assertion : Aniline is better nucleophile than anilium ion. Reason : Anilium ion have +ve charge.

Assertion: Anion vacancies in alkali halides are produced by heating the alkali halide crystals with alkali metal vapour. Reason: Electrons trapped in anion vacancies are referred to as F -centres.

Assertion: Aniline does not undergo Friedel Crafts reaction. Reason : Friedel Crafts reaction is an electrophilic substiution reaction.

Assertion: Aniline hydrogen sulphate on heating forms a mixture of ortho and para aminobenzene sulphonic acids. Reason: The sulphonic acid group is electron withdrawing.

Assertion: Aniline does not undergo Friedel-Crafts reaction. Reason: Friedel-Crafts is an electrophilic substitution reaction

Assertion: Anhydrous BaO_(2)is used for preparing H_(2)O_(2). Reason : Hydrated BaO_(2) is not available.

Assertion. Analgesics bring down the body temperature during high fever. Reason. Penicillin is a tranquilliser.

Assertion : An ordinary filter paper impreganted with collodion solution stops the flow of colloidal particles. Reason : Pore size of the filter paper beeomes more than the size of colloidal particle.

Assertion : An ionic product is used for any types of electrolytes whereas solubility product is applicable only ro sparingly soluble salts. Reason : Ionic product is defined at any stage of the reaction whereas solubility product is only applicable to the saturation stage.

Assertion :- An increase in surface area increases the rate of evaporation. Reason :- Stronger the inter-molecular attractive forces, fast is the rate of evaporation at a given temperature.

Assertion : An example of K-capture is ._(56)^(133)Ba + e^(-) rarr ._(55)^(133)Cs + X-ray. Reason : The atomic number decreases by one unit as result of K-capture

Assertion: an electrochemical cell can be set up only if the redox reaction is spontaneous. Reason: A reaction is spontaneous if free energy change is negative.

Assertion : An aqueous solution of ferric chloride is acidic due to hydrolysis. Reason : Ferric chloride is a covalent compound and exists as a dimer.

Assertion : Amylase in the presence of sodium choride i.e., Na^(+) ions catalytically very active. Reason : Metal ions such as Na^(+), Mn^(2+) , Co^(2+) , Cu^(2+),etc. act as activitors.

Assertion :- Amount of charge on hydrophobic sol is greater than hydrophilic sol. Reason :- Lyophobic sol is inorganic substance lycophilic sol is organic substance.

Assertion: Among the halogens bond energy of F_(2) is minimum. Reason: Among halogens F atom is small in size.

Assertion: Ammonolysis of alkyl halides invovles the reaction between alkyl halides and alcoholic ammonia. Reason: Reaction can be used to prepare only 2^(@) amines.

Assertion: Ammonolysis of alkyl halides involves reaction between alkyl halides and alcoholic ammonia. Reason: Ammonolysis of alkyl halides mainly produces 2^(@) amines.

Assertion Ammonia has higher critical temperature than CO_(2) Reason Ammonia forms intermolecular hydrogen bonds while CO_(2) does not.

Assertion : Amino acids are soluble in benzene and ether Reason: Amino acids exist as zwitter ion.

Assertion: Amines are more basic than esters and ethers Reason: Nitrogen is less electronegative than oxygen. It is in better position to accommodate the positive charge on the proton.

Assertion: Amines are basic in nature. Reason: Presence of ione pair of electron on nitrogenatom.

Assertion.Aluminothermy is used forextractionofchromiumfrom chromiumoxide. Reason.Aluminareactswith carbonto fromaluminiumcarbidewhich decomposes at hightemperatureto from Al whilecarbonisoxidisedto CO.

Assertion: Alums are crystalline double salts, which are soluble in water. Reason: The eq.solutions of alums have acidic character due to hydrolysis

Assertion : Aluminothermic process is the extraction of chromium from chromic oxide. Reason : Alumina has a high melting point.

Assertion : Aluminium metal is used as a reducing agent for the extraction of metals. Reason : Aluminium has great affinity for oxygen.

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