# Class 10 Science Metals and Non Metals Questions and Answers

In this page we have Class 10 Science Metals and Non Metals Questions and Answers . Hope you like them and do not forget to like , social shar and comment at the end of the page.

## One Marks Questions

Question 1
Which of the following metals will melt at body temperature?
Gallium, Magnesium, Caesium, Aluminium

Question 2
What are amphoteric oxides? Give two examples of amphoteric oxides.

Question 3
Why do ionic compounds have high melting points?

Question 4
Why are ionic compounds usually hard?
Question 5
Write the chemical equation for the reaction of hot aluminium with steam.

Question 6
Name two highly malleable metals.

Question 7
Why do silver ornaments lose their shine when kept for some time?

Question 8
Why do we use copper and aluminium wire for transmission of electric current?

## 2 Marks Question

Question 1
Name two metals which react violently with cold water. Write any observation you would make when such a metal is dropped into water. How would you identify the gas evolved, if any, during the reactions?

Question 2
Why do metals not evolve hydrogen gas with nitric acid?

Question 3
When calcium metal is added to water the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
Question 4
A metal that exists as a liquid at room temperature is obtained by heating sulphide in the presence of air. Identify the metal and its ore and give the reaction involved.

Question 5
Why do ionic compounds conduct electricity in molten state?
Question 6
A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. Write down the reactions of oxide B with HCI and NaOH.
Question 7
What the constituents are of solder alloy? Which property of solder makes it suitable for welding electrical wires?
Question 8
Name a metal which is poor conductor of electricity and a non metal which is good conductor of electricity.

Question 9
Name two metals which are found in nature in the Free State.
Justify the statement – ‘All ores are minerals but all minerals are not ores’. Give one example which can be called both ore and mineral.
Question 10
Describe briefly the method to obtain mercury from cinnabar. Write the chemical equation for the reactions involved in the process.

Or
The reaction of metal ‘X’ with Fe2O3 is highly exothermic and is used to join railway tracks. Identify the metal ‘X’. Write the chemical equation of the reaction.
Question 11
Name the constituents of bronze and write its two uses.

Question 12
Name a metal/non-metal:
(a) Which makes iron hard and strong?
(b) Which is alloyed with any other metal to make an amalgam?
(c) Which is used to galvanise iron articles?
(d) Whose articles when exposed to air form a black coating?
Question 13)
An alloy has low melting point and is therefore used for electrical fuse. Name the alloy and write its constituents.

Question 14
Give reasons for the following:
(i) Gold and silver are used to make jewellery.
(ii) Carbonate and sulphide ores are generally converted into oxide ores prior to reduction during the process of extraction.
Question 15
Differentiate between roasting and calcinations processes giving one example of each.

Question 16
A substance X which is an oxide of a metal is used intensively in the cement industry. This element is present in bones also. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved.
Question 17
Why sodium is kept immersed in kerosene oil?

Given below are the links of some of the reference books for class 10 Science.

You can use above books for extra knowledge and practicing different questions.

### Practice Question

Question 1 Which among the following is not a base?
A) NaOH
B) $NH_4OH$
C) $C_2H_5OH$
D) KOH
Question 2 What is the minimum resistance which can be made using five resistors each of 1/2 Ohm?
A) 1/10 Ohm
B) 1/25 ohm
C) 10 ohm
D) 2 ohm
Question 3 Which of the following statement is incorrect? ?
A) For every hormone there is a gene
B) For production of every enzyme there is a gene
C) For every molecule of fat there is a gene
D) For every protein there is a gene

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