Subject

Chemistry

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement

41.

RNA and DNA are chiral molecules, their chirality is due to:

  • L -sugar component

  • chiral bases

  • chiral phosphate ester units

  • chiral phosphate ester units


D.

chiral phosphate ester units

RNA and DNA molecules have ribose and deoxyribose sugar respectively. Both are chiral, their chirality is due to D -ribose or deoxyribose sugar components. 


Advertisement
42.

Which one of the following on reduction with lithium aluminium hydride yield a secondary amine?

  • Nitroethane

  • Methylisocyanide

  • Acetamide

  • Acetamide


43.

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is Called:

  • Clemmensen reduction

  • Cope reduction

  • Dow reduction

  • Dow reduction


44.

The reaction: 


Which of the following compounds will be formed ?


Advertisement
45.

Predict the product C obtained in the following reaction of butyne - 1.

CH subscript 3 CH subscript 2 space minus space straight C identical to CH space plus space HCl space rightwards arrow straight B space rightwards arrow with HI on top space straight C


46.

Which of the compounds with molecular formula C5H10 yields acetone on ozonolysis?

  • 2-methyl-2- butene

  • 3- methyl -1-butene

  • cyclopentane

  • cyclopentane


47.

Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid? 

  • C6H5CH2CHO

  • C6H5CHO

  • CH3CH2CH2CHO

  • CH3CH2CH2CHO


48.

Consider the following compounds:



The correct decreasing order of their reactivity towards hydrolysis is;

  • (ii) >(iv) > (iii) > (i)

  • (i) > (ii) > (iii) > (iv)

  • (iv) > (ii) > (i) > (iii)

  • (iv) > (ii) > (i) > (iii)


Advertisement
49.

The product formed in aldol condensation is:

  • a beta-hydroxy acid

  • a beta -hydroxy aldehyde or ketone

  • an alpha -hydroxy aldehyde or ketone

  • an alpha -hydroxy aldehyde or ketone


50.

The order of decreasing reactivity towards an electrophilic reagent, for the following:

i) Benzene
ii) Toluene
iii) Chlorobenzene
iv) Phenol

would be:

  • (i) > (ii) > (iii) > (iv)

  • (ii) > (iv) > (i) > (iii)

  • (iv) > (iii) > (ii) >(i)

  • (iv) > (iii) > (ii) >(i)


Advertisement