1 De’s Foundation ICSE Chemistry
SET-II
Q1.
Name the salts having the given description:(a) On treating with conc.
H2SO4 this salt changes from blue to white.
(b) This salt gives NO2 on heating
(c) An acid salt
(d) An insoluble salt
(e) On heating this...
More
1 De’s Foundation ICSE Chemistry
SET-II
Q1.
Name the salts having the given description:(a) On treating with conc.
H2SO4 this salt changes from blue to white.
(b) This salt gives NO2 on heating
(c) An acid salt
(d) An insoluble salt
(e) On heating this salt changes from green to black.
Q2.
What happens when?
(a) Neutral litmus solution is added to an acid
(b) Water is added to conc.
H2SO4
(c) Conc.
H2SO4 is added to CuSO4 .
5H2O
(d) Temperature of reaction mixture of HNO3 rises above 2000
C.
(e) NaOH is added drop wise till in excess to a solution of ZnSO4.
Q3.
Short questions:(a) Why is direct addition of dil.
H2SO4 to lead carbonate an impractical method of preparing lead sulphate?
(b) Describe 3 chemical tests (other than use of indicators) which prove that solution of HCL in water is an
acid.
(c) What chemical compounds are required for the laboratory preparation of HNO3 acid?
(d) Write a chemical equation to illustrate the acidic nature of nitric acid.
(e) State six
Less
