Posted On : 14-May-2018

Q1: Now a days, Yellow lamps are frequently used as street lights. Which among the following gases, is used in these lamps?

• A. Sodium
• B. Neon
• C. Hydrogen
• D. Nitrogen

Q2: The atmospheric air is held to the earth by

• A. Gravity
• B. Winds
• C. Clouds
• D. Rotation of the earth

Q3: The Noble Gas used for the treatment of cancer is ___?

• A. Helium
• B. Argon
• C. Krypton
• D. Radon

Q4: The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organisms is

• A. 04-Jun
• B. 42827
• C. 43016
• D. Dec-16

Q5: Troposphere is the hottest part of the atmosphere because

• A. it is closest to the Sun
• B. there are charged particles in it
• C. it is heated by the Earth?s surface
• D. heat is generated in it

Q6: The gas which turns limewater milky is

• A. carbon dioxide
• B. carbon monoxide
• C. ammonia
• D. nitrogen dioxide

Q7: Which of the following is the lightest gas?

• A. hydrogen
• B. helium
• C. xenon
• D. radon

Q8: Hydrogen is not found in atmosphere because

• A. It is highly inflammable
• B. It is the lightest gas
• C. It is absorbed by plants
• D. It immediately combines with oxygen to form water

Q9: The gas used for filling weather balloons is

• A. Helium
• B. Hydrogen
• C. Air
• D. Nitrogen

Q10: What is the chemical name of Laughing Gas?

• A. Silver nitrate
• B. Sodium carbonate
• C. Calcium sulphate
• D. Nitrous oxide