Periodic Classification of elements MCQ question and answer with solution

61

Which of the following types of elements show variable valency?

A) Transition elements B) s-block elements C) f-block elements D) Both A and C

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Answer & Solution

Answer: Option D

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62

Californium is a member of the . . . . . . . . group.

A) halide B) actinide C) inert gas D) halogen

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Answer & Solution

Answer: Option B

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63

How does the metallic property of an element change in the modern periodic table?

A) The metallic property increases from left to right in the period and from top to bottom in the group B) The metallic property increases in the period from left to right but decreases from top to bottom in the group C) Metallic property decreases from left to right in a period and from top to bottom in a group D) The metallic property decreases in the period from left to right but increases from top to bottom in the group

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Answer: Option D

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64

The rule of octaves was applicable only till . . . . . . . .

A) magnesium B) zinc C) calcium D) bromine

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Answer: Option C

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65

When the elements are arranged in increasing order of atomic weights, the atomic weight of the middle element is approximately the average of the atomic weights of the other two elements' - this rule is known as-

A) Rule of Mendeleev B) Newton's law C) Newland's law of octaves D) Dobereiner's law of triads

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Answer: Option D

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66

Which groups of the modern periodic table consists of a full-covering valence electron and chemically inert elements?

A) 15 B) 16 C) 18 D) 17

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Answer: Option C

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67

Which of the following always increase while moving from top to bottom in a group?

A) Metallic properties B) Oxidation potential C) Electrical negativity D) Tendency to decrease

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Answer & Solution

Answer: Option A

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68

The Law of Triad was given by

A) Henry Moseley B) John Newlands C) D.I. Mendeleev D) J.W. Dobereiner

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Answer: Option D

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69

Name the Noble gas placed in the third period and eighteen group of modern periodic table-

A) Neon B) Krypton C) helium D) argon

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Answer & Solution

Answer: Option D

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70

. . . . . . . . is not an actinoid?

A) Thorium B) Nobelium C) Terbium D) Fermium

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Answer & Solution

Answer: Option C

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Periodic Classification of elements MCQ question and answer with solution | Chemistry Gk MCQs