set 1 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) noble gases
(b) noble metals
(c) halogen
(d) light metals
The correct answers to the above question in:
Answer: (a)
All these are noble gases with completely filled outermost shell.
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Read more chemistry Based General Science Questions and Answers
Question : 1
Change of water into the vapour is called
a) Physical
b) Chemical
c) Natural
d) Biological
Answer »Answer: (a)
Question : 2
Which of the following statements is incorrect from the point of view of modern periodic table ?
a) There are eighteen vertical columns called groups
b) Transition elements fit in the middle of long periods
c) Elements are arranged in the order of increasing atomic number
d) Noble gases are arbitrarily placed in eighteenth group
Answer »Answer: (d)
Question : 3
Which fact is not valid for Dobereiner's triads?
a) The properties of middle element is roughly average of the other two elements
b) The elements of triads belong to the same group of modern periodic table
c) The atomic weight of middle element is roughly average of the other two elements
d) The elements of triads have same valency electrons.
Answer »Answer: (a)
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