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Question
State the inference drawn from the following observation:
A gas Q turns moist lead acetate paper silvery black. Identify the gas Q.
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Solution
The gas is H2S.
RELATED QUESTIONS
Define a mixed salt.
Give two examples of an acid salt.
Give two examples of a mixed salt.
Name two sulphates which are insoluble.
What is meant by the term weak acid?
Give the name and formula of the acid salt which gives sodium ions and sulphate ions in solution.
From the formulae listed below, choose one in each case corresponding to the salt having the given description :
AgCI, CuCO3, CuSO4.5H2O, KNO3, NaCI, NaHSO4, Pb(NO3), ZnCO3, ZnSO4.7H2O
(a) An acid salt
(b) An insoluble chloride
(c) On treating with concentrated sulphuric acid, this salt changes from blue to white.
(d) On heating this salt changes from green to black.
(e) This salt gives nitrogen dioxide on heating
What is the term defined by the following?
A salt containing a metal ion surrounded by other ions or molecules.
NaHSO4 is an acid salt.
The acid which does not form acid salt by a basic radical.
