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

A. have similar chemical properties

B. have consecutive atomic numbers

C. are isobars

D. are isotopes

A. Ar

B. Kr

C. Ne

D. He

A. 16^th

B. 17^th

C. 18^th

D. 15^th

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

A. argon

B. copper

C. chlorine

D. phosphorus

A. Metallic character increases

B. Chemical reactivity decreases

C. Metallic character decreases

D. Chemical reactivity increases

A. 90 - 103

B. 89 - 102

C. 58 - 71

D. 57 - 70

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

A. Dobereiner, Newlands and Moseley

B. Dobereiner, Mendeleev and Moseley

C. Dobereiner, Newlands and Mendeleev

D. Mendeleev, Newlands and Moseley

A. chlorine

B. iodine

C. fluorine

D. bromine