1.

State the inference drawn from the following observations : (i) On carrying out the flame test with a salt P a brick red flame was obtained.What is the cation in P ? (ii) A gas Q turns moist lead acetate paper silvery black.Identify the gas Q. (iii) pH of liquid R is 10.What kind of substance is R. (iv) Salt S is prepared by reacting dilute sulphuric acid with copper oxide. Identify S.

Answer»

(i) Cation in P is Ca2+

(ii) Gas Q is hydrogen sulphide. 

(iii) Substance R is alkaline. 

(iv) Salt S is copper sulphate.



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