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Which one of the following elements is a non-metal but is lustrous ?

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Important Questions on UPSC CDS (I) Previous Year Paper 2021

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Which one of the following metals has both malleability and ductility properties ?
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We are given three copper wires of different lengths and different areas of cross-section. Which one of the following would have the highest resistivity ?
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UPSC CDS
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Which of the following statements about 'fission' is correct ?

A. It is related with the creation of new individuals by means of cell division in unicellular organism.
B. It is related with the transformation of heavier nuclei into smaller nuclei.

C. It is related with the creation of a heavier nucleus by means of combining two higher nuclei.

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Which one of the following is an electric conductor ?

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A non-spherical shining spoon can generally be considered as a _____.

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UPSC CDS
IMPORTANT
Who amongst the following is a pioneer in discovering the heating effect of electric current ?
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Which one of the following laws of electromagnetism does not give the direction of magnetic field ?
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UPSC CDS
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An antibiotic is not useful against a virus whereas a vaccine is. Which one of the following is the most appropriate reason for this ?