A. Mixture B. Compound Element D. None of these
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A. In the range 5.5-6.5 B. In the range of 8-9 C. Less than 5.5 D. Is in the range of 6.5-7.5
A. Atomic number B. Number of valence electrons C. Atomic mass number D. Atomic size
A. Baking soda B. Washing soda C. Gypsum D. Copper sulphate
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A. Alkaline earth metals B. Alkali metals C. Noble gases D. Halogens
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A. Chlorine B. Oxygen C. Nitrogen D. Hydrogen
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A. Make gold more yellowish B. Make gold hard C. Make gold soft D. Give gold luster
A. Cu and Fe B. Au and Ag C. Cu and Al D. Pb and Hg
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A. Oxalic acid B. Lactic acid C. Malic acid D. Tartaric acid