Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.	If elements with principal quantum number n > 4 were not allowed in nature, then what will be the number of possible elements?
A.	60
B.	20
C.	4
D.	64
Answer» B. 20

Discussion

2.	β-rays emitted from radioactive material are known as electromagnetic radiation.
A.	True
B.	False
Answer» C.

Discussion

3.	When a radioactive substance emits an α-particle, its position in the periodic table is lowered by which of the following?
A.	One place
B.	Two places
C.	Three places
D.	Four places
Answer» C. Three places

Discussion

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Explore topic-wise MCQs in Testing Subject.

If elements with principal quantum number n > 4 were not allowed in nature, then what will be the number of possible elements?

β-rays emitted from radioactive material are known as electromagnetic radiation.

When a radioactive substance emits an α-particle, its position in the periodic table is lowered by which of the following?