set 1 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) changing into CaCO3
(b) combining with water
(c) giving of CO2
(d) giving out water
The correct answers to the above question in:
Answer: (b)
$CaSO_4.{1/2}H_2O+3/2H_2O ⟶ {CaSO_4}.2H_2O$
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Read more chemistry ncert Based General Science Questions and Answers
Question : 1
The chemical name of bleaching powder is
a) calcium oxychloride
b) calcium chloroxide
c) calcium chloride
d) none of above
Answer »Answer: (a)
Question : 2
Which one of the following salts when dissolved in water makes the solution basic?
a) Ferric chloride
b) Sodium chloride
c) Copper sulphate
d) Sodium acetate
Answer »Answer: (d)
Question : 3
The chemical formula of washing soda is
a) Na2CO3
b) NaHCO3
c) NaOH
d) Ca(OH)2
Answer »Answer: (a)
Question : 4
Antacids contain –
a) weak acid
b) strong base
c) weak base
d) strong acid
Answer »Answer: (c)
Antacids are weak bases which are given when a patient is suffering from acidity. These antacids neutralises the acid and give relief to patient.
Question : 5
Reaction of an acid with a base is known as –
a) combination
b) redox reaction
c) decomposition
d) neutralization
Answer »Answer: (d)
In a neutralization reaction an acid reacts with a base and forms salt and water.
Question : 6
Which among the following statements with regard to pH scale is/are correct?
- It is a logarithmic scale.
- The scale is limited to 0-14 because the ionic product of water is about $10^{-14}$
- The lower the value of pH, the greater the acidity of the solution.
a) I and III only
b) I and II only
c) I, II and III
d) II only
Answer »Answer: (c)
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