111 Q) A person is weak, sterile and has very poor eyesight. These are the symptoms because of a pollutant
(a) copper
(b)mercury
(c) magnesium
(d) lead
112 Q) In modern days, which one of the following chemical compounds is used for the hair setting in beauty parlour/ salon?
(a) A phosphate compound
(b) A sulphur compound
(c) A magnesium compound
(d) A bicarbonate compound
113 Q) "The gas used in a refrigerator is
"
(a)cooled down on flowing
(b)heated up on flowing
(c)cooled down when compressed
(d)cooled down when expanded
114 Q) Which one of the following is not an ore?
(a) Bauxite
(b) Pig iron
(c) Malachite
(d) Zinc blende
115 Q) Which one of the following is used to measure the performance of a motor or gasoline, an aviation fuel?
(a) Iodine number
(b) Octane number
(c) Both 'a' and 'b'
(d) Neither 'a' nor 'b'
116 Q) The number of spectral lines when electron jumps from 5th energy level to 2nd energy level state will be
(a) 5
(b) 10
(c) 6
(d)15
117 Q) Match the Following
|
List 1 (Polymers)
|
List II (Monomers)
|
|
A.
Nylon-6
|
1.
para-phenylenediamine + Terephthaloyl chloride
|
|
B.
Kevlar
|
2.
Caprolactum
|
|
C.
Nylon-66
|
3.
Hexamethylene diamine + Adipic acid
|
|
D.
Bakelite
|
4.
Phenol + Formaldehyde
|
(a) 2 1 3 4
(b) 2 3 4 1
(c) 3 4 2 1
(d) 3 1 2 4
118 Q) Which one of the following is the metallurgical operation in which a metal is obtained in a fused state?
(a) Calcination
(b)Roasting
(c) Froth floatation
(d)Smelting
119 Q) "What is the role of positive catalyst in chemical reaction?
"
(a) It increase the rate of reaction
(b) It decrease the rate of reaction
(c) It increases the yield of the products
(d) It provides better purity of the products
120 Q) "Consider the following statements. Loss of beta- particle is equivalent to
I.increase in one proton only.
II.decrease in one neutron only.
Which of the statements given above is/are correct?"
(a) Only I
(b) Only II
(c)Both I and II
(d) Neither I nor II
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