1. What type of mixture is smoke ?
Correct! Wrong!
Ans. : - (d)
2. A compound that is water vapour from the air is -
Correct! Wrong!
Ans. : - (d)
3. Which one among the following will you put into pure water in order to pass electric current through it ?
Correct! Wrong!
Ans. : - (c)
4. Gypsum (CaSO2.2H2O) is added to clinker during cement manufacturing to -
Correct! Wrong!
Ans. : - (a)
5. Sodium thiosulphate (Na2S2O3) solution is used in photography to -
Correct! Wrong!
Ans. : - (c)
6. Sacrific cacrificial anode protects iron or ships, underground pipelines etc from rusting, a process unown as cathodic protection. Which one of the Following metals cannot be used as a sacrificial anode ?
Correct! Wrong!
Ans. : - (a)
7. Scuba divers are at risk due to high concentration of dissolved gases while breathing air at high pressure under water. The tanks used by Scuba divers are filled with -
Correct! Wrong!
Ans. : - (a)
8. Which one among the following has been producing/can produce light by a chemical change ?
Correct! Wrong!
Ans. : - (a)
9. Nail polish remover contains -
Correct! Wrong!
Ans. : - (a)
10. The rusting of iron nail -
Correct! Wrong!
Ans. : - (b)