set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 2 EXERCISES
The following question based on some important man made materials topic of general science mcq
(a) Alum
(b) Alumina
(c) Clay
(d) Gypsum
The correct answers to the above question in:
Answer: (a)
Gypsum is added in calculated quantity in order to adjust the rate of setting of cement. Alum is NOT present in cement.
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Read more chemistry test online Based General Science Questions and Answers
Question : 1
When glass is heated, it
a) melts only above 1000°C
b) vapourises
c) does not melt at a fixed temperature
d) None of these
Answer »Answer: (c)
Question : 2
Which one of the following is not contained in portland cement ?
a) Ca2 SiO4
b) Ca3 SiO5
c) Ca3Al2O6
d) Ca3 (PO4)2
Answer »Answer: (d)
A typical composition for portland cement is CaO, SiO2, Al2O3, Fe2O3, CaSO4 .2H2O.
∴ Ca3 (PO4)2 is not contained in portland cement.
Question : 3
Soft soaps are
a) potassium salt of fatty acids
b) sodium salt of fatty acids
c) sodium and potassium salt
d) potassium salt of sulphonic acids
Answer »Answer: (a)
Question : 4
Deficiency of vitamin E causes
a) Hemolytic anemia
b) Scurvy
c) Beriberi
d) None of these
Answer »Answer: (a)
Question : 5
Deficiency of vitamin A results in
a) sterility
b) skin diseases
c) lose in apetite
d) retarted growth
Answer »Answer: (d)
In childhood, lack of vitamin A retards growth and hence like other vitamins, it is also said to be a growth-promoting factor.
In mild deficiency, it leads to night blindness. Its prolonged deficiency leads to xerophthalmia.
Question : 6
One of the properties of glass is its transparency. This property of glass is due to
a) irregular arrangement of silicate units in glass.
b) regular arrangement of silicate units in glass.
c) its high viscosity.
d) its high coefficient of thermal expansion.
Answer »Answer: (a)
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