Page 1 - 4. Home Assignmen - Ch-3 Mettalurgy-1

SAI International School
Class-X

Subject_ Chemistry
Topic-Metal & Non metals
Subtopic- General Metallurgy (part-1)

Home Assignment

Objective-
MCQs
Q.1
A metal M has electronic configuration 2, 8, 3 and occurs in earth’s crust and its
oxide M2O3. It is more reactive than zinc. Which of the following options (s) is/are
correct?
(a) The metal M is iron
(b) The metal M is lead
(c) The ore form which metal M is extracted in haematite.
(d) The ore form which metal M is extracted is bauxite.

Q.2 Metals are refined by using different methods. Which of the following metals are
refined by electrolytic refining?
1. Au 2. Cu 3. Na 4. K
(a) 1 and 2 (b) 1 and 3

(c) 2 and 3 (d) 2 and 4
Q.3 Heating of concentrated ore in absence of air for conversion into oxide ore is
known as-
(a) roasting (b) calcination
(c) reduction (d) none of these

➢ 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 : A mineral is called ore, when metal is extracted from it conveniently
and economically.
Reason : All ores are minerals but all minerals are not ores.

Q.5 Assertion : Usually the sulphide ore is converted to oxide before reduction.
Reason : Reduction of oxides occurs easier.

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