Class 10 Science Chapter 3 MCQ

Class 10 Science Chapter 3 MCQ (Multiple Choice Questions) of Metals and Non-Metals. These sets of MCQ Online Tests contain more than 100 questions with suitable explanation and answers.

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Class 10 Science Chapter 3 MCQ for 2020-2021

Class: 10Science
Chapter: 3Multiple Choice Questions (MCQ) Tests

Class 10 Science Chapter 3 MCQ with Answers

Class 10 Science chapter 3 Metal and non-metals MCQ questions online test are given below for practice. These MCQs are prepared from NCERT Books only. Answers as well as explanation of each answers are also given just below the questions. Questions are useful for all board like CBSE, UP Board, MP Board, and other board who are following NCERT Textbooks 2020-2021 for their final exams.

Q1

Which of the following non-metals is a liquid?

[A]. Carbon
[B]. Bromine
[C]. Phosphorus
[D]. Sulphur
Q2

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

[A]. Diamond
[B]. Graphite
[C]. Sulphur
[D]. Fullerene




Q3

An alloy is

[A]. An element
[B]. A compound
[C]. A homogeneous mixture
[D]. A heterogeneous mixture
Q4

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of:

[A]. CuSO4
[B]. CuCO3
[C]. Cu(NO3)2
[D]. CuO



Q5

Silver articles become black on prolonged exposure to air. This is due to the formation of

[A]. Ag3N
[B]. Ag2O
[C]. Ag2S
[D]. Ag2S and Ag3N
Q6

Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?

[A]. Au and Cu
[B]. Au and Na
[C]. Cu and Na
[D]. Na and K



Q7

Which one of the following properties is not generally exhibited by ionic compounds?

[A]. Solubility in water
[B]. Electrical conductivity in solid state
[C]. High melting and boiling points
[D]. Electrical conductivity in molten state
Q8

Anushka is writing some statement which is given by her teacher. Would you help him to choose the incorrect statements?

[A]. The metals at the top of the activity series (K, Na, Ca, Mg and Al) are so reactive that they are never found in nature as free elements.
[B]. Aqua regia, is a freshly prepared mixture of concentrated hydrochloric acid and dilute nitric acid in the ratio of 3:1.
[C]. Cinnabar (HgS) is an ore of mercury. When it is heated in air, it is first converted into mercuric oxide (HgO).
[D]. Sodium and chloride ions, being oppositely charged, attract each other and are held by strong electrostatic forces of attraction to exist as sodium chloride (NaCl).
Q9

Aluminium is used for making cooking utensils. Which of the following properties of Aluminium are responsible for the same?

[A]. Good thermal conductivity, Good electrical conductivity
[B]. Good thermal conductivity, Ductility
[C]. Good electrical conductivity, Ductility
[D]. Good thermal conductivity, High melting point
Q10

Consider the following statements, choose the incorrect one:

[A]. Gold being least reactive metal has been placed at the bottom in the series.
[B]. If a metal is below hydrogen in the activity series, then it will easily react with water and acids to produce hydrogen gas.
[C]. Potassium is the most reactive metal here, so it has been placed at the top in the reactivity series.
[D]. All the metals placed below hydrogen in the reactivity series lose electrons less readily than hydrogen.




Hydrogen gas is not evolved when a metal reacts with nitric acid. Why?

It is because HNO3 is a strong oxidising agent. It oxidises the H2 produced to water and itself gets reduced to any of the nitrogen oxides (N2O, NO, NO2). But magnesium (Mg) and manganese (Mn) react with very dilute HNO3 to evolve H2 gas.

Why does Magnesium float on the surface of hot water?

Magnesium reacts with hot water to form magnesium hydroxide and hydrogen. It starts floating due to the bubbles of hydrogen gas sticking to its surface.

Why do ionic compounds have high melting and boiling points?

This is because a considerable amount of energy is required to break the strong inter-ionic attraction.

Why are the sulphides and carbonates converted into their oxides during the extraction of metal?

It is easier to obtain a metal from its oxide, as compared to its sulphides and carbonates. Therefore, prior to reduction, the metal sulphides and carbonates must be converted into metal oxides.

All the Multiple Choice questions are prepared by the subject expert. Only important questions for board examinations are included here with answer and explanation. There are four choices with one correct choice. About 25 sets of MCQ online tests are given to use free.



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