Question: why we should not sleep under tree at night:

• 1. Carbon di oxide
• 2. Oxygen
• 3. Nitrogen
• 4. Hydrogen

Question: Without boiling liquid state changes into gaseous state by the ___ process?

• 1. condensation
• 2. melting
• 3. freezing
• 4. evaporation

Question: With altitude air pressure ?

• 1. increase
• 2. Decrease
• 3. Not change
• 4. None

Question: The most important stimulant in tea leaves is?

• 1. Phenylalanine
• 2. Caffeine
• 3. Brucine
• 4. None

Question: X ray was discovered by___?

• 1. Wilhelm Rontgen
• 2. Marie Curie
• 3. Alfred Nobel
• 4. None

Question: ___ is a branch of science which deals with.

• 1. Light
• 2. Motion
• 3. Sound
• 4. All

Question: ___________ is the lightest substance on the earth.

• 1. Nitrogen
• 2. Oxygen
• 3. Hydrogen
• 4. None of these

Question: "Titan "is satellite of?

• 1. Saturn
• 2. Venus
• 3. Neptune
• 4. Earth

Question: “Ricket” is a disease due to deficiency of?

• 1. Vitamin D
• 2. Vitamin A
• 3. Vitamin K
• 4. Vitamin B

Question: To an astronaut in the spacecraft, the sky appears to be.

• 1. White
• 2. Red
• 3. Blue
• 4. Dark