Periodic Classification of elements MCQ question and answer with solution

1

The elements of group in the Periodic table

A) have similar chemical properties B) have consecutive atomic numbers C) are isobars D) are isotopes

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Answer & Solution

Answer: Option A

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2

Which of the following elements has high ionization energy?

A) Ar B) Kr C) Ne D) He

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Answer & Solution

Answer: Option D

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3

In the modern periodic table, which group of elements has an outer shell complete?

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

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Answer & Solution

Answer: Option C

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4

Elements of a group have similar chemical properties because-

A) They are all metallic elements B) They have the same electronic configuration C) Molecular number increases as in the group moves down D) None of these

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Answer & Solution

Answer: Option B

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5

. . . . . . . . is tetratomic element?

A) argon B) copper C) chlorine D) phosphorus

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Answer & Solution

Answer: Option D

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6

With the increase in atomic number in period

A) Metallic character increases B) Chemical reactivity decreases C) Metallic character decreases D) Chemical reactivity increases

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Answer & Solution

Answer: Option C

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7

The atomic number of lanthanides is in . . . . . . . . range?

A) 90 - 103 B) 89 - 102 C) 58 - 71 D) 57 - 70

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Answer & Solution

Answer: Option C

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8

Which of the following is not a feature of transition elements?

A) Most of these are used as catalysts B) They are all air C) They are all metals, and have high boiling points and melting points D) They are conductors of heat and electricity

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Answer & Solution

Answer: Option B

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9

Which of the following classifications was based on atomic masses?

A) Dobereiner, Newlands and Moseley B) Dobereiner, Mendeleev and Moseley C) Dobereiner, Newlands and Mendeleev D) Mendeleev, Newlands and Moseley

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Answer & Solution

Answer: Option C

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10

Which of the following elements has the smallest atomic radius in the fourth period?

A) chlorine B) iodine C) fluorine D) bromine

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Answer & Solution

Answer: Option D

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