XI Chemistry Mcqs
Atomic Structure – Chapter # 03 – Test 02
- Question 1 of 101. An orbital can accommodate a maximum number of:
Right Answer! Good
Wrong Answer Correct Answer is : 2 electrons
- Question 2 of 102. Atomic mass of an element is equal to:
Right Answer! Good
Wrong Answer Correct Answer is : Number of protons and neutrons
- Question 3 of 103. natural radioactivity is confined it:
Right Answer! Good
Wrong Answer Correct Answer is : Heavier elements
- Question 4 of 104. Radioactivity was first observed by:
Right Answer! Good
Wrong Answer Correct Answer is : Henry Bequeral
- Question 5 of 105. Radioactive rays consisting of streams of double positively charge particles are known as:
Right Answer! Good
Wrong Answer Correct Answer is : α-rays
- Question 6 of 106. X-rays were discovered by:
Right Answer! Good
Wrong Answer Correct Answer is : William Roentgen
- Question 7 of 107. The spectrum in which the boundary lines are not distinctly marked is known as:
Right Answer! Good
Wrong Answer Correct Answer is : Visible spectrum
- Question 8 of 108. Radioactive rays which are non material in nature are called:
Right Answer! Good
Wrong Answer Correct Answer is : γ-rays
- Question 9 of 109. The rays which are intense ionizer of the gas:
Right Answer! Good
Wrong Answer Correct Answer is : α –rays
- Question 10 of 1010. When cathode rays were passed through an electric field:
Right Answer! Good
Wrong Answer Correct Answer is : They were deflected to the positively charged plate