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) $NaHCO_3$
(b) $CaCO_3$
(c) $Ca(OH)_2$
(d) $Na_2CO_3$
The correct answers to the above question in:
Answer: (a)
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Read more chemistry ncert Based General Science Questions and Answers
Question : 1
Which method is employed for obtaining a pure metal?
a) Magnetic separation
b) Froth floatation
c) Electrolytic refining
d) Gravity separation
Answer »Answer: (c)
Question : 2
Which of the following is considered a mineral acid ?
a) Lactic acid
b) Citric acid
c) Oxalic acid
d) Phosphoric acid
Answer »Answer: (d)
Question : 3
Plaster of paris is obtained –
a) by adding sulphuric acid to calcium hydroxide
b) by heating gypsum to a very high temperature
c) by adding water to calcium sulphate
d) by heating gypsum to 373 K.
Answer »Answer: (d)
$CaSO_4.{2H_2O} ⟶↖Δ CaSO_4 . 1/2H_2O + 3/2H_2O$
Question : 4
pH of human body varies within the range of
a) 5.5 to 5.8
b) 7.0 to 7.8
c) 6.0 to 6.5
d) 7.0 to 11.0
Answer »Answer: (b)
Question : 5
The useful element in photography is
a) Silver Bromide
b) Sulphuric Acid
c) Silver Nitrate
d) Citric Acid
Answer »Answer: (a)
Question : 6
Antacids are commonly used to get rid of acidity in the stomach. A commonly used antacid is
a) calcium hydroxide
b) sodium hydrogen phthalate
c) magnesium hydroxide
d) manganese acetate
Answer »Answer: (c)
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