set 2 MCQ Questions & Answers Detailed Explanation

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The following question based on classification of elements, chemical bonding, periodicity in properties & physical transformation topic of general science mcq

Questions : On moving horizontally across a period, the number of electrons in the outermost shell increases from ...... to ....... .

(a) 2, 18

(b) 1, 8

(c) 2, 8

(d) 1, 18

The correct answers to the above question in:

Answer: (b)

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Question : 1

Which one of the following is most electropositive element?

a) Calcium

b) Aluminium

c) Sodium

d) Silicon

Answer: (c)

Question : 2

The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?

a) Metalloid

b) Non-metal

c) Metal

d) Left-hand side element

Answer: (a)

The given element belongs to carbon family.

Question : 3

Which of the following is correct set of Dobereiner Triads?

a) Be, Mg, Ca

b) F, Cl, I

c) Na, Si, Cl

d) Li, Na, Be

Answer: (a)

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