Test: Metals In Nature


15 Questions MCQ Test Science Class 10 | Test: Metals In Nature


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This mock test of Test: Metals In Nature for Class 10 helps you for every Class 10 entrance exam. This contains 15 Multiple Choice Questions for Class 10 Test: Metals In Nature (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Metals In Nature quiz give you a good mix of easy questions and tough questions. Class 10 students definitely take this Test: Metals In Nature exercise for a better result in the exam. You can find other Test: Metals In Nature extra questions, long questions & short questions for Class 10 on EduRev as well by searching above.
QUESTION: 1

Which of the following alloy has copper as its constituent?

Solution:
QUESTION: 2

Which of the following does not corrode?

Solution:
QUESTION: 3

Solder is an alloy of:

Solution:
QUESTION: 4

Ruthenium (Ru) and platinum (pt) are

Solution: Ruthenium and paltinum are noble metals beacause they do not react with other substances and found in their pure forms.
QUESTION: 5

An alloy of iron, chromium and nickel is:

Solution:
QUESTION: 6

The purity of pure gold in carat is:

Solution:
QUESTION: 7

Alloying is not done for which of the following purpose?

Solution:

alloying a metal ,its properties not degrade but they show the upgrade qualities like high tensile strength,lustrous etc .New substance formed by the alloying ,like brass is the result of alloying.

QUESTION: 8

Which of the following metal is always a constituent of an amalgam?

Solution:
QUESTION: 9

In galvanization, iron is coated with a layer of:

Solution:
QUESTION: 10

Minerals from which metals are extracted are called:

Solution:
QUESTION: 11

Which of the following is not a half-metal?

Solution:

Chlorine os the second halogen, being a non - metal in group 17 of the periodic table. It's not a half metal because it is a now metal.

QUESTION: 12

Anodising is done in case of:

Solution:

Anodising is a process of forming a thick oxide layer of aluminum. This aluminium oxide coat makes it resistant to further corrosion.

QUESTION: 13

The Homogeneous mixture of two or more metals or a metal and a non-metal is called an:

Solution:

An alloy is a homogenous mixture of two or more metals or non metals mixed in a molten state.

QUESTION: 14

Give the composition of brass.

Solution: Obviously copper and zinc is the right one. copper percentage in the mixture of brass is 73% and and the zinc percentage in the mixture of brass is 25%.To enhance the machinability of brass, lead is often added in concentrations of around 2%.
QUESTION: 15

Silver articles become black when exposed to air due to formation of:

Solution:

The silver article becomes black after sometimes when exposed to air because silver reacts with sulphur which is present in the atmosphere and then forms silver sulphide. Thus the layer of this silver sulphide is formed on the surface of the silver article so they appear as dull or black.

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