SCIENCE TEST 12
When the rice is boiled, it expands because
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Assertion (A) : An iron ball floats on mercury but gets immersed in water. Reason (R) : The specific gravity of iron is more than that of mercury. Codes:
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The most reactive among the halogens is
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Living organisms require at least 27 elements, of which 15 are metals. Among these, those required in major quantities, include
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Fat present below the skin surface in our body, acts as a barrier against
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Permanent hardness of water cannot be removed by
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Colour blindness is
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A simple machine helps a person in doing:
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Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this? 1. Dispersion 2. Refraction3. Internal reflection Select the correct answer using the codes below.
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Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?
1 point
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