Ethane is formed by the reaction of methyl iodide and sodium meta

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 Multiple Choice QuestionsMultiple Choice Questions

121.

Formation of 2-butene as major product by dehydration of 2-butanol is according to

  • Markownikoff rule

  • Saytzeff rule

  • Peroxide effect

  • Anti-Markownikoff rule


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122.

Ethane is formed by the reaction of methyl iodide and sodium metal in dry ether solution. This reaction is known as

  • Clemmensen's reduction

  • Kolbe's reaction

  • Wurtz reaction

  • Cannizaro's reaction


C.

Wurtz reaction

When alkyl halide reacts with sodium metal in presence of dry ether to give higher alkane. This reaction is called Wurtz reaction.

CH3I + 2Na + I-CH3 Dry ether CH3-CH3 + 2NaI


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123.

Which of the following does not contain chiral carbon atom?

  • Lactic acid

  • 2-chlorobutanoic acid

  • Tartaric acid

  • Succinic acid


124.

Base catalysed aldol condensation occurs with

  • benzaldehyde

  • 2-methyl propionaldehyde

  • 2, 2-dimethyl propionaldehyde

  • None of the above


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125.

Product C is


126.

The boiling points of three isomeric pentanes 1, 2 and 3 are

(1) 9.5°C
(2) 28°C
(3) 36°C
1, 2 and 3 are respectively

  • n-pentane, iso-pentane, neo-pentane

  • iso-pentane, neo-pentane, n-pentane

  • n-pentane, neo-pentane, iso-pentane

  • neo-pentane, iso-pentane, n-pentane


127.

In the sequence of reaction,

Starting compound A is-

  • RCN

  • RNC

  • RCHO

  • R2CO


128.

Match List-I with List-II and select the correct answer from the given codes.
List - I (Reaction) List - II (Reagent/ Catalyst)
A. Cannizaro reaction 1. SnCl2/ HCl
B. Stephen's reaction 2. NaOH
C. Clemmensen reduction 3. Zn/ Hg-conc. HCl
D. Rosenmund's reaction 4. Pd/ BaSO4Boiling xylene

  • A - 1; B - 2; C - 3; D - 4

  • A - 2; B - 1; C - 3; D - 4

  • A - 4; B - 3; C - 2; D - 1

  • A - 1; B - 4; C - 2; D - 3


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129.

Haloalkane in the presence of alcoholic KOH undergoes

  • elimination

  • polymerisation

  • dimerisation

  • substitution


130.

Grignard reagent is not prepared in aqueous medium but prepared in ether medium. Because

  • the reagent reacts with water

  • the reagent becomes inactive in water

  • it is insoluble in water

  • the reagent is highly reactive in water


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