CBSE Class 10 Chemistry Metals and Non Metals Chapter 3
Q 1 – The most abundant metal in the earth’s crust is
(a) Iron
(b) Aluminium
(c) Calcium
(d) Sodium
Q 2 – Why do shopkeepers apply oil on tools made of iron while storing them?
Q 3 – The poorest conductor of heat among metals is
(a) Lead
(b) Mercury
(c) Calcium
(d) Sodium
Q 4 – Which of the following is the correct arrangement of the given metals in ascending order of their reactivity?
Zinc, Iron, Magnesium, Sodium
(a) Zinc > Iron > Magnesium > Sodium
(b) Sodium > Magnesium > Iron > Zinc
(c) Sodium > Zinc > Magnesium > Iron
(d) Sodium > Magnesium > Zinc > Iron
Q 5 – Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
(a) FeO
(b) Fe2O3
(c) Fe3O4
(d) Fe2O3 and Fe2O4
Q 6 – Name the gas in air which tarnishes silver particles slowly.
Q 7 – Which of the following non-metal is lustrous?
(a) Sulphur
(b) Oxygen
(c) Nitrogen
(d) Iodine
Q 8 – Expand PVC.
Q 9 – Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper etc. are reduced by using
(a) Aluminium as reducing agent
(b) Sodium as reducing agent
(c) Carbon as reducing agent
(d) Calcium as reducing agent
Q 10 – The chemical name and formula of baking powder are:
(a) sodium chloride (NaCl)
(b) sodium bicarbonate (NaHCO3)
(c) sodium carbonate (Na2CO3)
(d) sodium sulphate (Na2SO4)
Q 11 – Amalgam is an alloy of
(a) Copper and Tin
(b) Mercury
(c) Lead and Tin
(d) Copper and Zinc
Chemistry Chapter 3 Important Questions Short Answer Type
Q 12 – Why does calcium float in water?
Q 13 – Metals have a shining surface in their pure state. Give a reason for the same.
Q 14 – Give an example of an elementary substance which is a good conductor of electricity but is not a metal.
Q 15 –Define Aqua Regia. What are its uses ?
Q 16 – State reasons for the following:
(i) Electric wires are covered with rubber-like material.
(ii) From dilute hydrochloric acid, zinc can liberate hydrogen gas but copper cannot.
Q 17 – Name two metals which can be used to reduce metal oxides to metal.
Long Answer Type Questions
Q 18 – A metal M is found in nature as MCO3. It is used in galvanizing iron articles. Name the metal M .
Q 19 – A metal X acts as a good electron donor. It reduces oxides of iron and manganese into the respective metals. Its reaction with iron is called thermite reaction and is used for welding tracks. What is the metal X ?
Q 20 – Differentiate between Ionic Compounds and Covalent Compounds ?
Q 21 –What are Amphoteric Oxides? Illustrate with reactions how Zinc and Aluminium are behaving as Amphoteric in Nature .
Q 22 –In the formation of compound between two atoms A and B, A loses two electrons and B gains one electron.
(a) What is the nature of the bond between A and B?
(b) Suggest the formula of the compound formed between A and B.
(c) On similar lines explain the formation of MgCl2 molecule.
(d) Common salt conducts electricity only in the molten state. Why?
(e) Why is melting point of NaCl high?
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