Page 2 - 1. HA (Obj. & Sub.)

Subjective-

S.LN Questions Ma Skill
o. rk
Q.1 1 R
Which of the following listed metals can displace zinc
from its salt solution? Give reason for your answer with a
chemicalequation:
Copper, Lead, Magnesium, Silver

Q.2 1 u
Give composition of the alloy: brass and bronze.

Q.3 3 R+A
Distinguish between the following:
a. Electrolytic reduction and electrolytic refining.
b. Mineral and ore.
c. Alloys and amalgams

Q.4 a. Write the steps involved in the extraction of pure metals in the 3 U+A
middle of the activity series from their carbonate ores.
B. How is copper extracted from its sulphide ore? Explain the various
steps supported by chemical equations. Draw a labelled diagram for
the electrolytic refining of copper
[CBSE 2016]

Q.5 An ore on heating in air produces sulphur dioxide. 5 HOT
Which process would you suggest for its concentration? Describe
briefly any two steps involved in the conversion of the
concentrated ore into the related metal. [CBSE2009]

---------------------------------------------------------------------------------------------------------------

2