A particle which is four times in mass and two times in charge that of proton is
Answer: B
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Wavelength of which of the following colours of the visible spectrum of light are maximally absorbed by green plants________
Answer: B
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The main active constituent of tea and coffee is
Answer: C
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The metal that is used as a catalyst in the hydrogenation of oils is ?
Answer: A
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How many valence electrons are in carbon?
Answer: B
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The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of
Answer: B
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Acids taste
Answer: A
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The luster of a metal is due to
Answer: D
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Which of the following is a non metal that remains liquid at room temperature ?
Answer: C
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Boron cannot form which one of the following anions?
Answer: B
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