Question

Dilute
Sulphuric
acid
089
Zinc
Granules
n the schematic diagram for the preparation of
uydrogen gas as shown in figure, what would happen
f following changes are made ?
a) In place of zinc granules, same amount of zinc
dust is taken in the test tube.
(b) Instead of dilute sulphuric acid, dilute
hydrochloric acid is taken.
(c) Sodium hydroxide is taken in place of dilute sulphuric
acid and the tube is heated. (C.B.S.E. 2010, 2014)
(a) Hydrogen gas would evolve at a greater speed because
zinc dust provides more surface area for the reaction as compared to granulated zinc.
(b) Almost same volume of gas would evolve.
(c) Hydrogen gas would evolve upon heating the tube.
Zn(s) + 2NaOH(aq) - Na ZnO2(aq) + H2(g)
Sod. zincate
A metal is treated with dil. H2SO4. The gas evolved is collected by the method shown in the
Answer the following:
Name the gas.
(11) Name the method of collection of the gas.
(iii) is the gas soluble or insoluble in water?
(iv) is the gas lighter or heavier than air?
(1) The gas evolved is hydrogen.
(C.B.S.E. 2010, 2015)​

Answer 1

Answer:

electrolysis is the method of collection of the gas.

hydrogen is insoluble in water.

it is lighter than air

Explanation: