Question68:-According to Wade's rule, *C_2B_4H_8" adopts
A:-Closo-structure
B:-Arachno-structure
C:-Nido-structure
D:-Hypho-structure
Correct Answer:- Option-C
Question69:-Which is more basic 7

B:-Pyrimidine
C:-Pyrrole
D:-Piperidine
Correct Answer:- Option-D
Question70:-Chloropicrin ‏کا‎
‎4८11 310 2"
ந: 30140 2" ` `
@:- 1101 3
D:-None of these
Correct Answer:- Option-B
Question71:-Which one of the following is a vat dye 7
A:-Alizarin
B:-Indigo
C:-Malachite green
D:-Martius yellow
Correct Answer:- Option-B
Question72:-Patterno-Buchi reaction is
A:-Rearrangement of “alpha’, *beta’-unsaturated ketone
B:-Photosensitisation of butadiene
C:-Photochemical oxidation
D:-Cycloaddition of carbonyl compound to alkene
Correct Answer:- Option-D
Question73:-An antiredeposition agent in detergents
A:-STPP
B:-CMC
C:-SDS
D:-Sodium perborate
Correct Answer:- Option-B
Question74:-p-azoxyanisole is an example of
A:-Semiconductor
B:-Super conductor
C:-Liquid crystal
D:-None of these
Correct Answer:- Option-C
Question75:-Which of the following will occur farthest downfield யாற்‌ ஒர்‌
A:-Benzene
B:-Ethyne
C:-Dimethyl ether
D:-Formaldehyde
Correct Answer:- Option-D
Question76:-One mole of sugar is dissolved in three mole of water. The relative lowering of vapour pressure is
‏2ھ‎
‎6:3
‎6:04
‎0-5
‎Correct Answer:- Option-C
Question77:-Which one of the following solutions would produce maximum elevation in boiling point 7

A:-0.1M glucose
B:-0.2M sucrose
1 (NO_3).2"

D:-0.1M 14950 4