set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on classification of elements, chemical bonding, periodicity in properties & physical transformation topic of general science mcq
(a) Calcium
(b) Aluminium
(c) Sodium
(d) Silicon
The correct answers to the above question in:
Answer: (c)
Practice classification of elements, chemical bonding, periodicity in properties & physical transformation (set 2) Online Quiz
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Question : 1
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 »Answer: (a)
The given element belongs to carbon family.
Question : 2
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 »Answer: (a)
Question : 3
A woman desires to clean the surface of her gold ornaments by a chemical approach. For this she requires to use
a) concentrated H2SO4
b) concentrated NaOH
c) aqua-regia
d) sodium thiosulphate solution
Answer »Answer: (c)
Question : 4
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
Answer »Answer: (b)
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