set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 3 EXERCISES
The following question based on nature of matter and composition topic of general science mcq
(a) Baking soda
(b) Tootpaste
(c) Toilet soap
(d) Vinegar
The correct answers to the above question in:
Answer: (a)
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Read more nature of matter and composition Based General Science Questions and Answers
Question : 1
A pungent smell often present near the urinals is due to
a) ammonia
b) sulphur-di-oxide
c) chlorine
d) urea
Answer »Answer: (a)
Question : 2
Select the correct order of evaporation for water, alcohol, petrol and kerosene oil
a) petrol > alcohol > water > kerosene oil
b) water > alcohol > kerosene oil > petrol
c) alcohol > petrol > water > kerosene oil
d) petrol > alcohol > kerosene oil > water
Answer »Answer: (d)
Question : 3
When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime whole water has turned pink. This is due to
a) sublimation of crystals
b) boiling
c) melting of potassium permanganate crystals
d) diffusion
Answer »Answer: (d)
Question : 4
Compounds
a) contain only one type of element
b) can be separated by their physical properties
c) are the same as mixtures
d) are different kinds of atoms chemically combined with each other.
Answer »Answer: (d)
In a compund the elements are present in a fixed ratio by weight.
Question : 5
Which one of the following elements shows variable equivalent mass?
a) Calcium
b) Zinc
c) Silver
d) Iron
Answer »Answer: (d)
Question : 6
To weld metals together, high temperature is required. Such a high temperature is obtained by burning
a) Methane in oxygen
b) Acetylene in oxygen
c) LPG in oxygen
d) Acetylene in nitrogen
Answer »Answer: (b)
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