21.

Consider the statement S1 snd S2:
S1: Conductivity always increases with decreases in the concentraction of electrolyte
S2: Molar Conductivity always increase with decreases in the concentration of Electrolyte.

The correct option among the following

• S1 is correct and S2 is wrong

• both S1 and S2 are correct

• Both S1 and S2 are wrong

• S1 is wrong S2 is correct

Match the refining methods (column I) Watch metals (column-II)

• I-b, II- c, III-d, IV-a

• I-c, II-d, III-b, IV-a

• I-c, II-a, III-b, IV-d

• I-b, II-d, III-a, IV-c

The major producer of the following reaction is

${\mathrm{CH}}_3{\mathrm{CHOHCH}}_2{\mathrm{CH}}_2{\mathrm{NH}}_2 \underset{\mathrm{triethylamine}}{\overset{\mathrm{ethyl} \mathrm{formate}(1 \mathrm{equiv}.)}{\to }}$

• CH₃CH=CH-CH₂NH₂

• CH₃-CHOH-CH=CH₂

• 

• CH₃-CHOHCH₂CH₂NHCHO

Major products of the following of the reaction are

• 

• CH₃OH and HCO₂H

• 

• 

Which of the following is a condensation polymer?

• Buna-S

• Teflon

• Nylon 6,6

• Neoprene

Ethylamine (C₂H₅NH₂) can be obtained from N-ethipthalimide on treatment with

• CaH₂

• H₂O

• NaBH₄

• NH₂NH₂

Amylopectin is composed of:

• β-D-glucose C₁-C₄ and C₂-C₆ linkages

• β-D-glucose C₁-C₄ and C₁-C₆ linkages

• α-D-glucose C₁-C₄ and C₂-C₆ linkages

• α-D-glucose C₁-C₄ and C₁-C₆ linkages

Increasing rate of S_N1 reaction in the following compounds is :

• (B)<(A)<(C)<(D)

• (A)<(B)<(D)<(C)

• (B)<(A)<(D)<(C)

• (A)<(B)<(C)<(D)

The major product of the following reaction is :

The synonym for water gas when used in the production of methanol is :

• Laughing gas

• syngas

• fuel gas

• natural gas