Page 1 - 4. Home Assignment - Ch-3 Uses of Metals & Nonmetals (Alloys)

SAI International School
Class-X

Subject_ Chemistry
Topic-Metal & Non metals
Subtopic- Uses of Metals & Non- metals (Alloys)

Home Assignment

Objective-

MCQs
Q.1 An alloy is
(a) an element (b) a compound
(c) a homogeneous mixture (d) a heterogeneous mixture

Q.2 Silver articles become black on prolonged exposure to air. This is due to the
formation of
(a) Ag3N (b) Ag3O
(c) Ag2S (d) Ag3S and Ag3N

Q.3 Galvanisation is a method of protecting iron from rusting by coating it with
a thin layer of
(a) gallium (b) aluminium (c) zinc (d) silver

➢ For Assertion& Reason question follow the following directions.
DIRECTION: Each of these questions contains an Assertion followed by Reason. Read
them carefully and answer the question on the basis of following options. You have to
select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of
Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of
Assertion.

(c) If Assertion is correct but Reason is incorrect.

(d) If Assertion is incorrect but Reason is correct.
(e) If Assertion & Reason both are incorrect.

Q.4 Assertion : Bronze is an alloy of lead and tin.
Reason : Alloys are heterogeneous mixture of metalswith other metals and
non-metals.

Q.5 Assertion : Food cans are coated with tin and not with zinc.
Reason : Zinc is more reactive than tin.

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