Page 2 - 4. Home Assignment - Ch-3 Uses of Metals & Nonmetals (Alloys)

Subjective-

S.L Questions Ma Skill
No. rk
Q.1 1 R
An alloy has low melting point and is there for used for
electrical fuse. Name the alloy and write its constituents.
[CBSE 2014]
Q.2 1 u
Which property makes solder alloy suitable for welding

electric wires?
Q.3 3 R+A
Name the constituent elements of alloys:
a. Brass,
b. Bronze,
c. Solder.
Mention one use of each alloy. [CBSE 2016]

Q.4 Sonia’s mother went to the market along withSonia to purchase a 3 HOT
bucket for home and a tiffin box for Sonia. Two types of buckets were
available, one galvanised (coated with zinc) and the other tin ( coated
with tin). Similarly, two types of tiffin boxes were available. Tin article
are costlier. Sonia suggested her mother to buy bucket made of
galvanised iron sheet. But tinned tiffin box.

(a) Why did Sonia suggest purchase galvanised iron bucket but tinned
tiffin box?
(b) What values are expressed by Sonia in the purchase of costlier
tinned box.
Q.5 5 U+A
What is meant by rusting? With labelled diagrams,
describe an activity to find out the conditions in which rusting
takes place. [CBSE
2012]

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

2