#title 3, Chemistry

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Describe the property of radioactive decay, Q. Describe the Half -Life  pro...

Q. Describe the Half -Life  property of radioactive decay? Ans. The decay of a nucleus is a random event. It is impossible to predict which nucleus will decay and when.

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With which of the given pairs CO 2 resembles: (1) HgCl 2 , C2H 2                                  (2) HgCl 2 , SnCl 4     (3) C 2 H 2 , NO 2     (4) N 2 O and NO 2

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A sample of water collected in the field had a pH of 6.8. By the time it was analyzed in the lab, the pH had decreased to 6.0. Give a possible explanation.

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The phosphate of a metal has the formula MPO4 .The formula of its nitrate will be: (1) MNO 3                                                   (2)  M 2 (NO 3 ) 2

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Q. Give the general formula of Organic Acids? Ans. Organic acids have the general formula RCOOH. The R- is an alkyl group or hydrogen. The functional group is -COOH and

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Q. Beneficiation of Ores? Most of the ores available in nature contain large amounts of impurities, i.e. gangue. Direct extraction of metals from the ores by metallurgical proc

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