Important Questions And Answers By Science Technology Subject
1) What is Hanshamak Vayu?
Answer: Carbon dioxide
2) Which physical property is true for carbon dioxide?
Ans: Combustible
3) What is the color of the solution blown with the help of straw in lime water?
Answer: Milky
4) What happens when carbon dioxide is processed with water at high pressure?
Answer: Carbonic acid
5) Which Y is useful for photosynthesis in plants?
Answer: Carbon dioxide
6) Which Y is required in the production of carbonic acid?
Answer: Carbon dioxide
7) What is the molecular formula of carbonic acid?
Answer: H2CO3
8) What is the chemical name of washing soda?
Answer: Sodium carbonate
9) What is the chemical name of baking soda?
Answer: Sodium bicarbonate
10) What is the chemical formula of baking soda?
Answer: NaHCO3
11) What is the chemical formula of washing soda?
Answer: Na2CO3
12) Which air makes limestone water milky?
Answer: Carbon dioxide
13) Which gas is dissolved in cold drinks like soda water?
Answer: Carbon dioxide
14) What is the solid form of carbon dioxide called?
Answer: Dry ice
15) What is the chemical name of marble?
Answer: Calcium carbonate
16) What can be used instead of calcium carbonate to make carbon dioxide gas?
Answer: Sodium carbonate
17) Which air is the lightest air?
Answer: Hydrogen
18) Which gas is combustible?
Answer: Hydrogen
19) Which physical property is true for hydrogen?
Ans: Combustible
20) Which gas is used as fuel and to get electricity?
Answer: Hydrogen
21) Which gas is useful in a balloon used to study the atmosphere above the air?
Answer: Hydrogen
22) Which gas is produced by heating a solution of ammonium chloride and sodium nitrite?
Answer: Nitrogen
23) What happens when nitrogen dioxide is treated with gaseous water?
Answer: Nitric acid
24) Which gas reduces the activity of oxygen in air?
Answer: Nitrogen
25) Which gas is used to create an inert atmosphere?
Answer: Nitrogen
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