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) The samples have variable compositions and are classified as metallic solutions.
(b) The materials are heterogeneous mixtures and can be classified by their components
(c) They are homogeneous mixtures and be classified as metallic alloys.
(d) The samples are heterogeneous mixtures that can be separated using magnetic properties.
The correct answers to the above question in:
Answer: (c)
As they have uniform composition throughout they are considered a homogeneous mixture.
Both samples are a mixture of two metals (gold and palladium) and thus are alloys.
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Read more nature of matter and composition Based General Science Questions and Answers
Question : 1
Which of the following is a colloid ?
a) Silicic acid
b) Urea solution
c) Sugar solution
d) NaCl solution
Answer »Answer: (a)
Those substances which can not pass through the membrane are termed colloids.
Example: silicic acid.
Whereas sugar solution, urea and NaCl can pass through the membrane.
Question : 2
The main component of Gobar gas is?
a) Ethylene
b) Chlorine
c) Hydrogen
d) Methene
Answer »Answer: (d)
Question : 3
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)
Question : 4
At NTP, the least volume will be occupied by 15 g of which one of the following ?
a) $N_2$
b) N$H_3$
c) $O_2$
d) Ne
Answer »Answer: (a)
Question : 5
Which of the following is considered to be a pure substance?
a) Muddy water
b) Sodium chloride
c) Granite
d) Milk of magnesia
Answer »Answer: (b)
Sodium chloride being compound is a pure substance. Granite, muddy water and milk of magnesia all are mixtures.
Question : 6
Vermicompost is an/a
a) organic bio fertilizer
b) inorganic fertilizer
c) toxic substance
d) synthetic fertilizer
Answer »Answer: (a)
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