MEDIUM
10th CBSE
IMPORTANT
Earn 100

To balance the following chemical equation the value of x and y should respectively be: 

2NaOH+xAl2O3yNaAlO2+H2O

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Important Questions on Chemical Reactions and Equations

MEDIUM
10th CBSE
IMPORTANT

State the change in colour observed in the following case mentioning the reason: 

Silver chloride is exposed to sunlight. 

MEDIUM
10th CBSE
IMPORTANT

State the change in colour observed in the following case mentioning the reason: 

A piece of zinc is dipped in ferrous sulphate solution. 

MEDIUM
10th CBSE
IMPORTANT

State the change in colour observed in the following case mentioning the reason: 

Copper powder is strongly heated in air.