set 4 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on acids, bases, salts and metals topic of general science mcq
(a) Na2CO3
(b) NaHCO3
(c) MgSO4
(d) MgCO3
The correct answers to the above question in:
Answer: (b)
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Read more chemistry ncert Based General Science Questions and Answers
Question : 1
Two elements gallium and oxygen combine to form a compound Ga2O3. Which among the following is the valency of gallium ?
a) 3
b) 1
c) 2
d) 4
Answer »Answer: (a)
Question : 2
Which of the following is not a hydrated salt?
a) Baking soda
b) Washing soda
c) Blue vitriol
d) Epsom salt
Answer »Answer: (a)
Baking soda is NaHCO3
Question : 3
Which one among the following is not a property of salt?
a) Salts are brittle
b) Salts have ordered packing arrangements called lattices
c) Salts have low melting points but high boiling points
d) Salts conduct electricity when dissolved in water or even in the molten state
Answer »Answer: (c)
Question : 4
Statement I :
Addition of water to an aqueous solution of HC1 decreases the pH.
Statement II :
Addition of water suppresses the ionisation of HC1.
a) Statement I is true, but Statement II is false
b) Both the statements are individually true and Statement II is the correct explanation of Statement I
c) Both the statements are individually true but Statement II is not the correct explanation of Statement I
d) Statement I is false, but Statement II is true
Answer »Answer: (a)
Question : 5
Acid contained in the sting of an ant is ___________ .
a) formic acid
b) lactic acid
c) acetic acid
d) ascorbic acid
Answer »Answer: (a)
The sting of an ant contains formic acid. Its effect can be neutralized by rubbing moist baking soda on the affected part.
Question : 6
Consider the following statements.
- Anhydrous Sodium bicarbonate is commonly known as baking sodium (baking soda).
- Baking soda is used as a fire extinguisher.
- Bleaching powders are produced in Hasnclaver plant.
a) 2 and 3
b) Only 3
c) 1, 2 and 3
d) 1 and 2
Answer »Answer: (a)
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