94420 + Interview Questions in Chemistry in Class 12

1.	malonic acid and succinic acid are distinguished by:
Answer» HEATING `NaHCO_3` Both (a) and (B) NONE ANSWER :A

Discussion

2.	Maleic anhydride can be obtained by the oxidation of benzene by
Answer» AIR in PRESENCE of `V_2O_5` `KMnO_4` in PRESSURE of `H_2SO_4` Air in pressure of `P_2O_5` `K_2Cr_2O_7` in presence of HCl Solution :

Discussion

3.	Maleic and fumaric acids :
Answer» Have IDENTICAL m.pt Have identical SOLUBILITY in water Form the same ANHYDRIDE on heating None Answer :C

Discussion

4.	Maleic acid and fumaric acid:
Answer» have IDENTICAL MELTING point FORM the same ester with methanol have identical solubility in WATER form the same anhydride on heating Answer :C

Discussion

5.	Maleic acid and fumaric acid are -
Answer» 1-Butene 1,2-Dibromoethene Propene Isobutylene Answer :B

Discussion

6.	Maleic acid and fumaric acid are the forms of :
Answer» CHAIN ISOMERS Geometrical isomers Optical isomers Functional isomers ANSWER :B

Discussion

7.	Malamine plastic crockery is made of polymer material, the raw materials of which are
Answer» `CH_(3)CHO` and `CH_(2)NH_(2)` Answer :C

Discussion

8.	Malamine plastic crockery is a polymer of:
Answer» HCHO and malamine HCHO and ethylene Malamine and ethylene None Answer :A

Discussion

9.	Melamine plastic crockery is a polymer of:
Answer» HCHO and melamine HCHO and ethylene Melamine and ethylene None Answer :A

Discussion

10.	Malachite ore is:
Answer» `Cu_2S` `Cu_2O` `CuCO_3` `CuCO_3.Cu(OH)_2` ANSWER :D

Discussion

11.	Malachite is an ore of,
Answer» Iron Zinc COpper Mercury Answer :C

Discussion

12.	Malachite is an ore of :
Answer» Iron Copper Mercury Zinc Answer :B

Discussion

13.	Malachite has _______ composition.
Answer» `2CuCO_(3)` `CuCO_(3)Cu(OH)_(2)` `Cu_(2)O` `Cu_(2)S` ANSWER :B

Discussion

14.	Malachite green is a direct dye for silk and wool. It is prepared by condensing
Answer» Benzaldehyde and dimethyl ANILINE Carbonyl chloride and dimethyl aniline Benzene diazonium chloride with dimethyl aniline None of the above Solution :MALACHITE GREEN prepared by the CONDENSATION of Benzaldehyde and dimethyl aniline.

Discussion

15.	Malachite and azurite are used respectively are:
Answer» BLUE and GREEN pigment RED and green pigment Green and blue pigment Green and red pigment Answer :C

Discussion

16.	Make the correct increasing order of reactivity of following compounds with HBr//HCl
Answer» `(i) LT (II) lt (III)` `(ii) lt (i) lt (iii)` `(ii) lt (iii) lt (i) ` `(iii) lt (ii) lt (i)` ANSWER :C

Discussion

17.	Make structures of 2,3-dibromobutane and assign R and S configuration.
Answer» SOLUTION :

Discussion

18.	(major) Select incorrect statement (s).
Answer» Major product is L-lactic acid. Reactant is CALLED as D-alanine. Reaction involves diazotization. Product on HEATING GIVES lactide. Solution :N//A

Discussion

19.	Major Project is :
Answer» SOLUTION :N//A

Discussion

20.	Major product (x) is :-
Answer» 1 Answer :D

Discussion

21.	Major product P formed in the reaction is (AAK_MCP_36_NEET_CHE_E36_026_Q01)
Answer» (`AAK_MCP_36_NEET_CHE_E36_026_A01`) ANSWER :C

Discussion

22.	Major product of the reaction is ?
Answer» NONE of these Answer :B

Discussion

23.	Major product of the following S_(N)1 reaction is CH_(3)underset(Br)underset(\|)CHunderset(CH_(3))underset(\|)(CH)CH_(3)+C_(2)H_(5)ONato
Answer» `{:(CH_(3)CHCHCH_(3)),(""\|),(""OC_(2)H_(5)):}` `{:(CH_(3)CHCHCH_(2)CH_(2)OC_(2)H_(5)),(""\|),(""CH_(5)):}` `CH_(3)CH_(2)underset(OC_(2)H_(5))underset(\|"")OVERSET(CH_(3))overset(\|"")(C CH_(3))` none is correct Answer :C

Discussion

24.	Major product of the given reaction is- CH_(3)-underset(H_3C)underset(\|)overset(CH_3)overset(\|)(C)-underset(Cl)underset(\|)(C)H-CH_(3) overset(C_(2)H_(5)O^(Theta))rarr
Answer» `CH_(3)-underset(CH_(3))underset(\|)overset(CH_3)overset(\|)(C)-underset(OC_(2)H_(5))underset(\|)(C)H-CH_(3) ` `CH_(3)-underset(CH_(3))underset(\|)overset(CH_3)overset(\|)(C)-CH=CH_(2)` `CH_(3)-overset(CH_3)overset(\|)(C)=underset(CH_(3))underset(\|)C-CH_(3)` `CH_(3)-underset(OC_2H_5)underset(\|)overset(CH_3)overset(\|)(C)-underset(\|)overset(CH_3)overset(\|)(C)H-CH_(3) ` Solution :Due to steric hindrance, SECONDARY alkyl halides prefer to undergo elimination reaction in presence of `overset(Theta)(O)Et`. Here `overset(Theta)(O)Et` acts as a base. In this case, according to Saytzeff's rule, a more stable ALKENE is FORMED in this reaction.

Discussion

25.	Major product of the following reaction will be C_2H_5O Na +CH_3-underset(CH_3)underset\|overset(CH_3)overset(\|)C-Cl to
Answer» `CH_3-underset(CH_3)underset\|overset(CH_3)overset\|C-OC_2H_5` `CH_3-underset(CH_3)underset\|C=CH_2` `CH_2=CH_2` `CH_3-underset(C_2H_5)underset\|overset(CH_3)overset\|C-OCH_3` Solution :As sodium ethoxide is a very strong base, hence, ELIMINATION reaction PREDOMINATES over substitution reaction. It is governed by the acidity of `BETA`-hydrogen to be ELIMINATED (Hoffmann rule).

Discussion

26.	Major product of the following reaction is {:(""NH_(2)),("\|"),(CH_(3)CH-CH-CH_(3)+O=N-OH rarr),("\|"),(""CH_(3)):}
Answer» `{:(""N=NOH),("\|"),(CH_(3)-CH-CH),("\|"),(""CH_(3)):}` `{:(""OH),("\|"),(CH_(3)-C-CH_(2)CH_(3)),("\|"),(""CH_(3)):}` `{:(""OH),("\|"),(CH_(3)-CH-CH-CH_(3)),("\|"),(""CH_(3)):}` `{:(CH_(3)CH-CH_(2)CH_(3)),("\|"),(""CH_(3)):}` ANSWER :B

Discussion

27.	Major product of the following reaction is
Answer» RACEMIC MIXTURE diastereomer meso compound structural isomer Answer :C

Discussion

28.	Major product of the followingreaction is? CH_3 - CH(Br) - CH_2 - CH_3 +alc. KOHrarr?
Answer» BUTENE - 1 Butene - 2 Butane Butyne - 1 Answer :B

Discussion

29.	Major product obtained in the reaction is (AAK_MCP_37_NEET_CHE_E37_014_Q01)
Answer» `(AAK_MCP_37_NEET_CHE_E37_014_A01)` ANSWER :C

Discussion

30.	Major product is
Answer» ANSWER :C

Discussion

31.	Major product of reaction is :
Answer» BUTENE -1 butene-2 butane butyne-1 Answer :B

Discussion

32.	Major product is :
Answer» Both A and C Answer :D

Discussion

33.	Major product is :
Answer» ANSWER :A

Discussion

34.	major product is :
Answer» SOLUTION :N//A

Discussion

35.	Major product formed is:
Answer» ANSWER :A

Discussion

36.	Major product formed in the following reaction sequence is:
Answer» ANSWER :B

Discussion

37.	Major product formed when toluene on monochlorination.
Answer» ANSWER :C

Discussion

38.	Major product formed in the following reaction is (AAK_MCP_37_NEET_CHE_E37_011_Q01)
Answer» `(AAK_MCP_37_NEET_CHE_E37_011_A01)` ANSWER :A

Discussion

39.	Major product.
Answer» SOLUTION :

Discussion

40.	major product :
Answer» ANSWER :A

Discussion

41.	Major Product :
Answer» ANSWER :B

Discussion

42.	major product :
Answer» `Ph-OVERSET(O)overset(\|\|)(C )-NH_(2)` ANSWER :A

Discussion

43.	Major pollution causing agent is
Answer» Man Hydrocarbon gases Animals None of the above Solution :Because he MADE FACTORIES, automobiles ETC. which is most polluting

Discussion

44.	Major credit for the discovery of noble gases is given to:
Answer» Cavendish Ramsay Rayleigh None Answer :B

Discussion

45.	Major alkene of the following reaction is {:(CH_(3)-C CH_(2)CH_(3)),("\|"overset(Delta)(rarr.)),(""+N (CH_(3))OH^(-)):}
Answer» `CH_(3)CH=CHCH_(3)` `CH_(2)=CHCH_(2)CH_(3)` `(CH_(3))_(2)C=CH_(2)` `(CH_(3))_(2)C=C(CH_(3))_(2)`. ANSWER :B

Discussion

46.	Major Component in spiegeleisen is
Answer» FE, MN C Mg Mn, C, Zn C Answer :A

Discussion

47.	Major aerosol pollutant present the jet plane emission is
Answer» SULPHUR dioxide Fluorocarbon Carbon tetrachloride Carbon monoxide Answer :B

Discussion

48.	"Maintenance free" batteries now in use in place of common batteries have
Answer» Electrode MADE of LEAD-lead oxide Electrodes made of calcium-containing lead alloy Non AQUEOUS solvents as medium Platinum electrodes Answer :B

Discussion

49.	Main structural unit of protein is :
Answer» ESTAR linkage Ether linkage Peptide linkage All the above Answer :C

Discussion

50.	Main source of lead pollution is from :
Answer» Sewage Leaded gasoline Tobacco Insectricides Answer :B

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

malonic acid and succinic acid are distinguished by:

Maleic anhydride can be obtained by the oxidation of benzene by

Maleic and fumaric acids :

Maleic acid and fumaric acid:

Maleic acid and fumaric acid are -

Maleic acid and fumaric acid are the forms of :

Malamine plastic crockery is made of polymer material, the raw materials of which are

Malamine plastic crockery is a polymer of:

Melamine plastic crockery is a polymer of:

Malachite ore is:

Malachite is an ore of,

Malachite is an ore of :

Malachite has _______ composition.

Malachite green is a direct dye for silk and wool. It is prepared by condensing

Malachite and azurite are used respectively are:

Make the correct increasing order of reactivity of following compounds with HBr//HCl

Make structures of 2,3-dibromobutane and assign R and S configuration.

(major) Select incorrect statement (s).

Major Project is :

Major product (x) is :-

Major product P formed in the reaction is (AAK_MCP_36_NEET_CHE_E36_026_Q01)

Major product of the reaction is ?

Major product of the following S_(N)1 reaction is CH_(3)underset(Br)underset(|)CHunderset(CH_(3))underset(|)(CH)CH_(3)+C_(2)H_(5)ONato

Major product of the given reaction is- CH_(3)-underset(H_3C)underset(|)overset(CH_3)overset(|)(C)-underset(Cl)underset(|)(C)H-CH_(3) overset(C_(2)H_(5)O^(Theta))rarr

Major product of the following reaction will be C_2H_5O Na +CH_3-underset(CH_3)underset|overset(CH_3)overset(|)C-Cl to

Major product of the following reaction is {:(""NH_(2)),("|"),(CH_(3)CH-CH-CH_(3)+O=N-OH rarr),("|"),(""CH_(3)):}

Major product of the following reaction is

Major product of the followingreaction is? CH_3 - CH(Br) - CH_2 - CH_3 +alc. KOHrarr?

Major product obtained in the reaction is (AAK_MCP_37_NEET_CHE_E37_014_Q01)

Major product is

Major product of reaction is :

Major product is :

Major product is :

major product is :

Major product formed is:

Major product formed in the following reaction sequence is:

Major product formed when toluene on monochlorination.

Major product formed in the following reaction is (AAK_MCP_37_NEET_CHE_E37_011_Q01)

Major product.

major product :

Major Product :

major product :

Major pollution causing agent is

Major credit for the discovery of noble gases is given to:

Major alkene of the following reaction is {:(CH_(3)-C CH_(2)CH_(3)),("|"overset(Delta)(rarr.)),(""+N (CH_(3))OH^(-)):}

Major Component in spiegeleisen is

Major aerosol pollutant present the jet plane emission is

"Maintenance free" batteries now in use in place of common batteries have

Main structural unit of protein is :

Main source of lead pollution is from :