Practice Objective questions - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) Scurvy is caused due to the deficiency of vitamin
(a)
(b)
(c)
(d)
Scurvy (bleeding of gums) is caused due to deficiency of vitamin ‘C’ (ascorbic acid).
Q-2) Which one of the following is not present in cement?
(a)
(b)
(c)
(d)
Gypsum is added in calculated quantity in order to adjust the rate of setting of cement. Alum is NOT present in cement.
Q-3) Which one among the following is the main ingredient in cement?
(a)
(b)
(c)
(d)
The composition of cement is CaO (lime) or limestone 62%, silica (SiO2) 22%, alumina (Al2O3) 7.5%, magnesia (MgO) 2.5%, etc.
Thus, limestone is the major raw material for cement.
Q-4) Consider the following statements- Soap cannot be used in acidic water.
- Ionic part of a soap is —COO– · Na+ .
- Soap dissolves in water faster then detergent.
Which of the statements given above is/are correct?
(a)
(b)
(c)
(d)
Detergent dissolves in water faster than soap.
Q-5) Deficiency of vitamin A results in
(a)
(b)
(c)
(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.
Q-6) Washing soap can be prepared by saponification with alkali of which of the following oil
(a)
(b)
(c)
(d)
Any oils which are good for eating or cooking, can be used in making soap. One of the best is said to be Coconut oil. Groundnut, shea butter, cocoa butter, sun flower and many other vegetable oils are also used.
Q-7) Alkaline hydrolysis of esters is known as
(a)
(b)
(c)
(d)
Alkaline hydrolysis of esters is known as saponification.
$\text"R - COOR' + NaOH ⟶ R 'OH + RCOONa"$
Q-8) Soaps are sodium salts of fatty acids. Which of the following fatty acid does not form soap?
(a)
(b)
(c)
(d)
Q-9) Given below is an approximate composition of a substance :
- CaO - 60-70%,
- SiO2 - 20-25%,
- Al2O3 - 5-10%,
- Fe2O3 - 2-3%
The substance is
(a)
(b)
(c)
(d)
Cement is made up of calcium oxide, silicon dioxide, aluminium tetra oxide and iron tetra oxide.
Q-10) Deficiency of vitamin E causes
(a)
(b)
(c)
(d)