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) Magnetic separation
(b) Froth floatation
(c) Electrolytic refining
(d) Gravity separation
The correct answers to the above question in:
Answer: (c)
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Read more chemistry ncert Based General Science Questions and Answers
Question : 1
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 : 2
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 : 3
With reference to ionic compounds, consider the following statements.
- Ionic compounds are insoluble in alcohol.
- Ionic compounds in the solid state are a good conductor of electricity.
a) Only 2
b) Both 1 and 2
c) Only 1
d) Neither 1 nor 2
Answer »Answer: (c)
Question : 4
The chemical formula of baking soda is
a) $NaHCO_3$
b) $CaCO_3$
c) $Ca(OH)_2$
d) $Na_2CO_3$
Answer »Answer: (a)
Question : 5
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 : 6
The useful element in photography is
a) Silver Bromide
b) Sulphuric Acid
c) Silver Nitrate
d) Citric Acid
Answer »Answer: (a)
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