Beta particles are emitted from the nucleus. They are: MCQ with Answer and Explanation

Beta particles are emitted from the nucleus. They are:
A. Neutrons
B. Fast electrons
C. Protons
D. Helium nuclei
Answer: Option B
Solution (By JKExamLibrary)
Beta (β⁻) particles are high-energy electrons emitted when a neutron converts to a proton. Positrons (β⁺) are also beta particles.

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Practice More chemistry Questions

Question #1
Soap is prepared by the reaction of fats with:
A. NaOH
B. Ethanol
C. HCl
D. NaCl

Correct Answer: Option A


Explanation:
Saponification: fat + NaOH → soap + glycerol. This is an alkaline hydrolysis. NaCl is used to precipitate soap (salting out).

This question belongs to: Science chemistry
Question #2
Graphite is used as a dry lubricant because:
A. It is a liquid
B. It is soft like diamond
C. It has a layered structure that allows sheets to slide
D. It reacts with the metal surface

Correct Answer: Option C


Explanation:
Graphite's carbon atoms are arranged in layers held together by weak van der Waals forces. Layers can slide over each other, reducing friction. It is stable at high temperatures, so used where oil would decompose.

This question belongs to: Science chemistry
Question #3
In the molecule CO, there is a coordinate covalent bond. Which atom donates the electron pair?
A. Carbon
B. Neither; it's ionic
C. Oxygen
D. Both share equally

Correct Answer: Option C


Explanation:
Carbon monoxide (CO) has a triple bond. In the formation, oxygen, with two lone pairs, donates one lone pair to form a coordinate bond with carbon after normal double bond formation, resulting in a structure :C≡O:. Thus oxygen donates the pair. This satisfies the octet for both.

This question belongs to: Science chemistry