Nitrobenzene, on nitration,produces
Options
(a) trinitrobenzene (b) m-dinitrobenzene (c) p-dinitrobenzene (d) all of these
Correct Answer:
m-dinitrobenzene
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Which of the following glass is used in making wind screen of automobiles
Options
(a) Jena (b) Pyrex (c) Safety (d) Crooke’s
Correct Answer:
Safety
Explanation:
No explanation available. Be the first to […]
Plaster of paris is used
Options
(a) in surgery and dentistry (b) as a white wash (c) as a constituent of toothpaste (d) for the preparation of RCC
Correct Answer:
in surgery and […]
Magnesium does not decompose in
Options
(a) steam (b) hot water (c) cold water (d) semi-hot water
Correct Answer:
cold water
Explanation:
Magnesium has a very slight reaction with cold water. The reaction soon […]
Which of the following polymer is an example of fibre
Options
(a) Silk (b) Dacron (c) Nylon-66 (d) All of these
Correct Answer:
All of these
Explanation:
Fibres are the polymers which have strong […]
At 400K sodium phenoxide reacts with CO₂ to produce
Options
(a) catechol (b) sodium salicylate (c) benzoic acid (d) salicylaldehyde
Correct Answer:
sodium salicylate
Explanation:
No explanation available. Be the first to write […]
Which of the following is a coordination compound
Options
(a) Potash alum (b) Potassium ferrocyanide (c) Mohr’s salt (d) Microcosmic salt
Correct Answer:
Potassium ferrocyanide
Explanation:
No explanation available. Be the first to […]
The hardness of transition elements is due to their
Options
(a) large atomic size (b) metallic bonding (c) covalent bonding (d) high ionisation energy
Correct Answer:
covalent bonding
Explanation:
The hardness of transition […]
The earth was formed about how many years ago?
Options
(a) 4.6 billion (b) 10 billion (c) 15 billion (d) 20 billion
Correct Answer:
4.6 billion
Explanation:
No explanation available. Be the first […]
The presence of gill slits, in the embryos of all vertebrates, supports the theory of
Options
(a) biogenesis (b) recapitulation (c) metamorphosis (d) organic evolution
Correct Answer:
recapitulation
Explanation:
No explanation available. Be […]
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