CBSE Class 10 Science Solved Question Paper 2012 | Previous Year Papers | Zigya

Subject

Science

Class

CBSE Class 10

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Sample Papers

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

On adding  2mL acetic acid to 2mL of water in a test tube, it was observed that

  • a clear and transparent solution is formed.

  • a white precipitate is formed almost immediately.

  • two separate layers were formed.

  • two separate layers were formed.

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2.

On adding acetic acid to sodium hydrogen carbonate in a test tube, a student observes.

  • no reaction

  • a colourless gas with pungent

  • bubbles of a colourless and odourless gas

  • bubbles of a colourless and odourless gas

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3.

Which one of the following are the correct observations about acetic acid.

  • It turns blue litmus red and smells like vinegar

  • It turns blue litmus red and smells like burning sulpur

  • It turns red litmus blue and smells like vinegar

  • It turns red litmus blue and smells like vinegar

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4.

The aqueous solutions of copper sulphate and zinc sulphate appear.

  • blue and green respectively

  • green and colourless respectively

  • blue and brown respectively

  • blue and brown respectively

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5.

Solutions of copper sulphate, iron sulphate and zinc sulphate are prepared and marked I, II and III respectively. Few pieces of aluminium are added to each solution after some time a change will be observe in.

  • I and II

  • II and III

  • III and I

  • III and I

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6.

In which of the follwing figures, budding is not shown?

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7.

Following diagrams were drawn by different students on having seen prepared slides of budding yeast.

  • I,II,III

  • II,III,IV

  • III,IV,V

  • III,IV,V

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8.

From the following diagrams, select the correct ones showing stages of binary fission in Amoeba:


  • I,II,III

  • IV,II,III

  • V,II,III

  • V,II,III

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9.

Four students showed the following traces of the path of a ray of light passing through a rectangular glass slab.



The trace most likely to be correct is that of student:

  • I

  • II

  • III

  • III

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10. While performing the experiment on tracing the path of a ray of light through a rectangular glass slab, in which of the following experimental set-ups is a student likely to get best results?


P1 and P2 are the positions of pins fixed by him.
  • I

  • II

  • III

  • III

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