Gamma rays have no charge and no mass. They are: MCQ with Answer and Explanation

Gamma rays have no charge and no mass. They are:
A. Electrons
B. Helium nuclei
C. Electromagnetic radiation
D. Particles
Answer: Option C
Solution (By JKSSB Mock Tests)
Gamma rays are high-frequency electromagnetic waves emitted from the nucleus. They have very high penetration power and are used in cancer therapy.

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Practice More chemistry Questions

Question #1
The calorific value of a fuel is measured using a:
A. Thermometer
B. Bomb calorimeter
C. Barometer
D. Manometer

Correct Answer: Option B


Explanation:
A bomb calorimeter burns a known mass of fuel in excess oxygen inside a sealed bomb immersed in water. The temperature rise of water is measured to calculate heat released. Thermometer is part of it but not the device itself.

This question belongs to: Science chemistry
Question #2
The alcohol present in alcoholic beverages is:
A. Propanol
B. Butanol
C. Ethanol
D. Methanol

Correct Answer: Option C


Explanation:
Ethanol (C₂H₅OH) is the intoxicating ingredient in beer, wine, spirits. Methanol is toxic. Propanol and butanol are used as solvents, not beverages.

This question belongs to: Science chemistry
Question #3
Which acid is known as 'Aqua Fortis'?
A. Sulfuric acid
B. Hydrochloric acid
C. Nitric acid
D. Acetic acid

Correct Answer: Option C


Explanation:
Nitric acid (HNO3) is historically known as Aqua Fortis, which translates to 'strong water' in Latin. This name was given by early alchemists due to its ability to dissolve almost all metals, including silver, which was not dissolved by other known acids at the time.

This question belongs to: Science chemistry