Question

CHEMISTRY
METALS & NON METALS



1. Name a non metal which is
(i) Lustrous
(ii) good conductor of electricity

2. Non metallic oxides shows both ______ nature like sulphur dioxide and _______ nature like water.

3. Name any two metals which can melt if we keep them on our palm.

4. Name any two metals which can evolve hydrogen gas with very dilute nitric acid.

5. What is the action of steam on lead ?

6. Arrange Zinc, Mercury and Lead in descending order of reactivity.

7. What is ionic bonding ?

8. Write the equation for reaction of Iron with Steam.

9. Why calcium floats on surface of water, despite denser that water ?

10. Why most of the metals do not produce hydrogen with nitric acid ?


11. Name the property of metals due to which they are used in making :
(a) food packing foils
(b) temple bells
(c) jewellery
(d) utensils


12. Show the amphoteric nature of any one metal oxide.

13. Draw the electron dot structure of Sodium Oxide.

14. A shiny white metal X upon burning in air gives a white powder Y. When this powder Y is mixed in water it gives a solution Z, which is used as an antacid.

(i) Identify X, Y, Z.
(ii) Write the involved Chemical equations.

15. A brown metal A upon burning produces a black powder B, which reacts with dilute hydrochloric acid to give a blue green precipitate C.
(i) Identify A, B and C.
(ii) Write the involved Chemical equations.





please guys answer this.I beg you.​

Answer 1

Answer:

3)gallium and cesium are the metals that melt when kept on palm.

Answer 2

Answer:

3

Explanation:

gallium and cesium are the metals that melt when kept on palm