Question:- What is laughing gas? A. Nitrous Oxide B. Carbon monoxide C. Sulphur dioxide D. Hydrogen peroxide
Answer:- Option A
Question:- Actinides are the elements with atomic numbers from A. 97 to 104 B. 101 to 115 C. 89 to 103 D. 36 from 43
Answer:- Option C
Question:- The filament of an electric bulb is made of A. tungsten B. nichrome C. graphite D. iron
Answer:- Option A
Question:- Diamond is an allotropic form of A. germanium B. carbon C. silicon D. sulphur
Answer:- Option B
Question:- In fireworks, the green flame is produced because of A. sodium B. barium C. mercury D. potassium
Answer:- Option B
Question:- Permanent hardness of water can be removed by adding A. chlorine B. washing soda C. potassium permanganate D. bleaching powder
Answer:- Option B
Question:- Marsh gas is A. nitrogen B. ethane C. methane D. hydrogen
Answer:- Option C
Question:- LPG consists of mainly A. methane, ethane and hexane B. ethane, hexane and nonane C. methane, hexane and nonane D. methane, butane and propane
Answer:- Option D