In this page we have Class 10 Science Metals and Non Metals short questions ( one and two marks) . Hope you like them and do not forget to like , social shar
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One Marks Questions
1) Which of the following metals will melt at body temperature?
Gallium, Magnesium, Caesium, Aluminium
2) What are amphoteric oxides? Give two examples of amphoteric oxides.
3) Why do ionic compounds have high melting points?
4) Why are ionic compounds usually hard?
5) Write the chemical equation for the reaction of hot aluminium with steam.
6) Name two highly malleable metals.
7) Why do silver ornaments lose their shine when kept for some time?
8) Why do we use copper and aluminium wire for transmission of electric current?
2 Marks 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?
2) Why do metals not evolve hydrogen gas with nitric acid?
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?
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.
5) Why do ionic compounds conduct electricity in molten state?
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.
7) What the constituents are of solder alloy? Which property of solder mmakes it suitable for welding electrical wires?
8) Name a metal which is poor conductor of electricity and a non – metal which is good conductor of electricity.
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.
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.
11) Name the constituents of bronze and write its two uses.
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?
13) An alloy has low melting point and is therefore used for electrical fuse. Name the alloy and write its constituents.
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.
15) Differentiate between roasting and calcinations processes giving one example of each.
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.
17) Why sodium is kept immersed in kerosene oil?