Chemistry - 10th

NAME OF THE STUDENT

Roll NO.

BATCH NO.

1.What do you observe when Lead nitrate is heated strongly in a test tube?

• BUFF YELLOW RESIDUE
• REDDISH BROWN GAS
• BOTH
• NOTA

2.Which gas is released when MnO2 react with Conc. HCl?

• AMMONIA
• CHLORINE
• H2S
• NO2

3. What do you observe when Copper carbonate is heated?

• BLUE RESIDUE IS OBTAINED
• YELLOW RESIDUE IS OBTAINED
• SILVERY RESIDUE IS OBTAINED
• BLACK RESIDUE IS OBTAINED

4. Which solution will you use to distinguish CuO & MnO2?

• Conc. HCl
• Conc. Sulphuric acid
• Conc. Nitric acid
• None of the above

5.Which indicator does not change colour in acidic solution?

• LITMUS PAPER
• PHENOLPHTHALEIN
• METHYL ORANGE
• pH paper