Staff selection commission tax assistant - solved paper - 2009 - Part 10

91. X-rays were discovered by-
Becquerel  Roentgen  Marie Curie  Van Lue 
 

92. Which of the following substance is highly plastic ?
Quartz  Mica  Granite  Clay 
 

93. The National Chemical Laboratory (India) is located in-
Mumbai  Bengaluru  Hyderabad  Pune 
 

94. A medicine which promotes the secretion of urine is called-
Adrenaline  Monouretic  Diuretic  Triuretic 
 

95. The chemicals released by one species of animals in order to attract the other members of the same species are-
Hormones  Nucleic acids  Pheromones  Steroids 
 

96. The tip of the match-stick contains-
Phosphorus pentoxide  White phosphorus  Red phosphorus  Phosphorus trichloride 
 

97. Match the source in Column B with the product of Column A.
Column A (Product)
(a) Formic acid
(b) Citric acid
(c) Tartaric acid
Column B (Source)
1. Lemon
2. Tamarind
3. Ants
(a) (b) (c)
3 2 1  3 1 2  2 3 1  2 1 3 
 

98. Commercially, sodium bicarbonate is known as-
Washing soda  Baking soda  Bleaching powder  Soda ash 
 

99. An emulsifier is an agent which-
Stabilises an emulsion  Aids the flocculation of an emulsion  Accelerates the dispersion  Homogenises an emulsion 
 

100. Mortar is a mixture of water, sand and-
Slaked lime  Quick lime  Limestone  Gypsum 
 

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