Options:
- A. Copper and Zinc
- B. Tin and Zinc
- C. Copper and Tin
- D. Iron and Zinc
View Answer
C. Copper and Tin
Everyday Science
A moderator is used in nuclear reactor in order to ?
Options:
- A. Accelerate the neutrons
- B. Slow down the speed of the neutrons
- C. Increase the number of elections
- D. Decrease the number of electrons
View Answer
B. Slow down the speed of the neutrons
When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________?
Options:
- A. Visible
- B. Transparent
- C. Invisible
- D. opaque
View Answer
A. Visible
Cobalt is a material which is ?
Options:
- A. Strongly attracted by a magnet
- B. Not attracted by a magnet
- C. not a magnet
- D. Weakly attracted by a magnet
View Answer
A. Strongly attracted by a magnet
Which of the following have maximum calorific value?
Options:
- A. Carbohydrates
- B. Fats
- C. Proteins
- D. Vitamins
View Answer
B. Fats
When a person enters a dark room from bright light he is not able to see clearly for a little while because the?
Options:
- A. Eye is unable to adjust itself immediately
- B. Retina becomes insensitive momentarily
- C. Iris is unable to dilate the pupil immediately
- D. Distance between the lens and retina take time to adjust
View Answer
C. Iris is unable to dilate the pupil immediately
A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to __________?
Options:
- A. Remain unaffected
- B. Fall away from the train
- C. Fall towards the train
- D. Fall away from or towards the train depending upon the speed
View Answer
C. Fall towards the train
The sunlight can reach a depth of___________meters in the ocean
Options:
- A. 80
- B. 200
- C. 120
- D. None
View Answer
B. 200
The most abundant element in the Earth
Options:
- A. Oxygen
- B. Hydrogen
- C. Carbon Dioxide
- D. Silicon
View Answer
A. Oxygen
In a very low temperature which from the following will freeze at last?
Options:
- A. River water
- B. Canal water
- C. Sea water
- D. Water in a lake
View Answer
C. Sea water