CBSE Class 10 Chemistry Metals And Non Metals Worksheet Set I

METALS AND NON METALS

1 MARK QUESTIONS :

1. Name the following: (1 Mark each)

i) The most abundant metal in the earth crust.

ii) The only non-metallic element which exists as a liquid.

iii) The process by which a metallic oxide ore changes into metal.

iv) Minerals which can be profitably converted to metals.

2. Show the electronic transfer in the formation of following :(1 mark each)

i)Sodium oxide      ii) Calcium Hydride     ii) (Magnesium chloride FOREIGN -2008)

( At.Nos. Na=11 , O=8 , Ca=20 , H=1 , Mg=12 , Cl=17 )

3. Classify the following compounds into ionic & molecular compounds.

( Fe₂O₃ , CO₂ , Mg₃N₃ , NH₃ , Li₂O , K₃N , HCl(g) , C6H₁₂O₆ , 3 , HCl (aq), CaO )

4. Give reasons: (1 mark each) (DELHI 2008C,CBSE 2012)

i) Metals can be given different shapes according to our needs.

ii) Hydrogen is not evolved when a metal reacts with nitric acid.

iii) Aluminium oxide is considered as an amphoteric oxide.

iv) Ionic compounds conduct electricity in molten state.

v) Gold and silver are used to make jewellery.

5. Why does calcium float in water ? (CBSE - 2011)

2 MARKS QUESTIONS

6. Differentiate between & give suitable examples:

i)Acidic oxide & basic oxide ii)Minerals & Ores iii) Roasting & Calcination

7. Complete & balance the equations:

i) K + H₂O → ------ + ------- ii) Al + H₂O(steam)→ ------ + -------

iii) Fe + H₂O (steam) → ---- +----- iv) Al₂O₃+NaOH→ ------ + ------

8. X + YSO₄ → XSO₄ + Y (CBSE -2011)

Y + XSO₄ → No reaction

Out of the two element, X and Y, which is more reactive and why ?

3 MARKS QUESTIONS:

Answer the following questions based on the above observations.

i)Which is the most active metal?

ii)What would be observed if B is added to aq.CuSO₄?

iii)Arrange the metals A, B, C & D in the increasing order of reactivity.

11 . The atomic numbers of elements A , B & C are11 ,17 & 6 respectively.

i)which of these elements is a metal that forms mono positive ion ?

ii)which two elements combine through ionic valency.

iii) what is the formula of the compound between C & B.

12. A student collected some old coins of reddish & grayish colour. Within a few months she noticed that red ones turned green while the grayish ones turned black due to some coatings.

Answer the following questions:

i) With what material are the coins made?

ii) Name the chemical phenomenon involved.

iii) Give the chemical name & formula of the coatings.

13. Value based Question :

Shivam helps his friend Rohan in studies. Shivam is topper in the class. Rohan also improved his performance. They like each other and they are friends.

a) What values are possessed by Shivam ?

b) What type of bond exists between Rohan and Shivam ?

c) Why are ionic bonds strong ?

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