Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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41.

The present undesirable matrix in mineral is called as :

  • flux

  • slag

  • gangue

  • alloy


C.

gangue

The matrix present in mineral is called as gangue.


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42.

The work of conc. H2SO4 in esterification process is as :

  • dehydrating agent and catalyst

  • dehydrating agent

  • hydrolysing agent

  • catalyst


43.

Which one will not show Cannizzaro reaction ?

  • Trimethyl acetaldehyde

  • Formaldehyde

  • Acetaldehyde

  • Benzaldehyde


44.

When 23 g sodium metal reacts with methyl alcohol , it will form :

  • 1 moles of H2

  • 2 mole of H2

  • 0.5 mole of H2

  • All of the above


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45.

Which compound forms urotropine when reacts with NH3 ?

  • HCHO

  • CH3CHO

  • CH3COCH3

  • C6H5OH


46.

In the presence of ether , 2-choloropropane reacts with sodium and form :

  • n-hexane

  • 2 , 3 - dimethyl butane

  • n - hexene

  • CH3CH=CH2


47.

Which inorganic compound on heating changes into organic compound ?

  • Ammonium cyanide

  • Sodalime

  • Potassium cyanide

  • Sodamide


48.

Which of the following compound will not show aldol condensation ?

  • CH3COCH3

  • HCHO

  • CH3CHO

  • CH3CH2CHO


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49.

The bad odour compound formed by the reaction between chloroform and aniline in the presence of alcoholic KOH :

  • acetylene

  • nitro benzene

  • phenyl isocyanate

  • carbylamine


50.

The condensation product of reaction between phenol and phthalic anhydride :

  • methyl orange

  • salicylic acid

  • phenol red

  • phenolphthalein


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