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NEET Chemistry Solved Question Paper 2016

Multiple Choice Questions

41.

In the reaction,

$straight H minus straight C identical to CH space rightwards arrow from left parenthesis ii right parenthesis space CH subscript 3 CH subscript 2 Br to left parenthesis straight i right parenthesis space NaNH subscript 2 divided by liq. NH subscript 3 of space straight X space space space space space space space space space space space space space space space space space space straight X space rightwards arrow from left parenthesis ii right parenthesis space CH subscript 3 CH subscript 2 Br to left parenthesis straight i right parenthesis NaNH subscript 2 divided by liq. NH subscript 3 of space straight Y$
X and Y are

X=2-butyne; Y= 3-hexyne
X=2-butyne;Y=2-hexyne
X=1-butyne ;Y = 2-hexyne
X=1-butyne ;Y = 2-hexyne

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42.
Consider the nitration of benzene using mixed conc. H₂SO₄ and HNO₃. If a large amount of KHSO₄ is added to the mixture, the rate of nitration will be

slower

uncharge

doubled

doubled

slower

IN the nitration of benzene in the presence of conc. H₂SO₄ and HNO_3, benzene is formed.
HNO₃ +H₂SO₄
If a large amount of KHSO₄ is added to this mixture more HSO₄^- ion furnishes and hence the concentration of electrophile decreases, rate of electrophilic aromatic reaction slows down.

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43.

The correct statement regarding RNA and DNA, respectively is

The sugar component in RNA is ribose and sugar component in DNA is 2' deoxyribose
The sugar component in RNA is arabinose and the sugar component in DNA is ribose
The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose
The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose

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