Question

Fill in the following blanks with suitable words :
(a) Magnesium liberates………………… gas on reacting with hot boiling water.
(b) The white powder formed when magnesium ribbon burns in oxygen is of………………………………..
(c) Ordinary aluminium strips are not attacked by water because of the presence of a layer of………………………………… on the surface of aluminium.
(d) A metal having low melting point is……………………. but a non-metal having very high melting point is………………………
(e) Calcium is a…………….. reactive metal than sodium.

Lakhmir Singh Chemistry Class 10

Answer 1

Ans 2. magnesium oxide I.e MgO


Ans 1. hydrogen gas as Mg+H2O gives MgO + H2 when heated , it is a displacement reaction.


Ans 3. Aluminium oxide or A2O3.


Ans 4. sodium , diamond


Ans e. less.

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Answer 2

Answer:

A. H2

B. MGO

C. H2O3

D. NA, DIAMOND

E. LESS

Explanation:

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