20
25
50
200
400
Correct answer is C
No explanation has been provided for this answer.
Which of the following particles/rays do not originate from the nucleus of an atom?
Alpha particles
Beta particles
Neutrons
Gamma rays
X-rays
Correct answer is E
No explanation has been provided for this answer.
Which of the following is used in a nuclear reactor to slow down fast-moving neutrons?
Carbondioxide gas
Liquid sodium metal
Concrete shield
Graphite rods
Boron rods
Correct answer is E
No explanation has been provided for this answer.
Which of the following is not part of the electromagnetic spectrum?
Radio wave
Gamma ray
Infra-red ray
Alpha particle
X-ray
Correct answer is D
No explanation has been provided for this answer.
Which of the following substances is most viscous at room temperature?
Water
Alcohol
Petrol
Palm oil
Kerosine
Correct answer is D
No explanation has been provided for this answer.