Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

41.

The transition metals mostly are

  • paramagnetic

  • diamagnetic

  • both 'a' and 'b'

  • neither diamagnetic nor paramagnetic


42.

Cadmium rods are used for which purpose?

  • emit electrons

  • absorb neutrons

  • emit neutrons

  • absorb electrons


43.

What is the effect of dilution on the equivalent conductance of strong electrolyte?

  • Decrease on dilution

  • Remains unchanged

  • Increase on dilution

  • None of the above


44.

Which one of the following molecules undergoes polymerisation to form natural rubber?

  • Styrene

  • 2-methyl-1, 3-butadiene

  • Ethylene

  • Iso-butene


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45.

An asymmetric carbon atom is which

  • attached three atoms or groups are different

  • attached all the atoms or groups are different

  • attached two atoms or groups are different

  • attached all the atoms or groups are the same


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46.

Hexamethylenetetramine is used as

  • urinary antiseptic

  • antipyretic

  • analgesic

  • all of these


A.

urinary antiseptic

Hexamethylenetetramine is used for the treatment of urinary tract infections. It decomposes at an acidic pH to form formaldehyde and ammonia.


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47.

Vinegar contains

  • 100% acetic acid

  • 10- 20% acetic acid

  • 7 - 8% acetic acid

  • 1% acetic acid


48.

Which of following is the correct order of increasing reactivity?

  • RCOOR' < RCOCl < RCONH2

  • RCOOR' < RCONH2 < RCOCl

  • RCOCl < RCONH2 < RCOOR'

  • RCONH2 < RCOOR' < RCOCl


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49.

Enzymes are

  • fatty acids

  • oils

  • minerals

  • proteins


50.

What is the name of reaction when benzaldehyde changes in to benzyl alcohol?

  • Cannizzaro's reaction

  • Wurtz reaction

  • Kolbe reaction

  • Friedel-Craft's reaction


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