Which one is a weak acid? from Class 12 TET Previous Year Board

Subject

Science

Class

TET Class 12

Pre Boards

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Sample Papers

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Magnetic quantum number determines

  • shape of orbitals

  • orientation of orbitals

  • total energy of an-orbital

  • spin of an electron


2.

Scurvy is caused due to deficiency of

  • vitamin D

  • vitamin K

  • vitamin C

  • vitamin A


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3.

Which one is a weak acid?

  • Citric acid

  • Nitric acid

  • Sulphuric acid

  • Hydrochloric acid


C.

Sulphuric acid

Citric acid is a carboxylic acid and carboxylic acid is a weaker acid than mineral acids like nitric acid, sulphuric acid, and hydrochloric acid because it does not easily release H ion.


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4.

Which scientist was developed the 'key' for the identification of animals?

  • Goethe

  • Cuvier

  • John Ray

  • Theophrastus


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5.

Seedless fruits are of no use in

  • Coconut

  • Tomato

  • Banana

  • Grape


6.

Fibers of cotton are obtained from

  • the inner fruit wall

  • calyx

  • seed coat

  • fruit wall


7.

Silk is obtained from which stage of silkworm?

  • Egg

  • Pupa

  • Adult

  • Larva


8.

Vivipary germinations are found in

  • Aquatic plants

  • Xerophyte plants

  • Mangrove plants

  • Shrubs


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9.

HIV mainly infects

  • Cytotoxic T-lymphocytes

  • Helper lymphocytes

  • Killer lymphocytes

  • Cell mediated T-lymphocytes


10.

Down's syndrome is caused due to

  • monosomy of 21st chromosome

  • trisomy of 21st chromosome

  • an extra chromosome in male

  • an extra chromosome in female


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