Q. Which of the following statements about diamond are correct?
1. It is used as a gem in jewellery because of its ability to reflect light.
2. It is a good conductor of electricity
3. It is used for cutting glass, marble stones and other hard materials
4. It is used for drilling of rocks
Select the correct answer using the code given below:
1) 1, 3 and 4
2) 2, 3 and 4
3) 1, 2 and 3
4) 2 and 4 only
Q. Which one among the following methods is not effective in removing arsenic from contaminated ground water?
1) Boiling
2) Reverse osmosis
3) Ton exchange
4) Coagulation-adsorption
Q. Bronze is often used to make statues and medals whereas brass is used in making utensils, scientific apparatus and cartridges. Both brass and bronze are copper containing alloys, yet they differ in their chemical composition for additionally containing:
1) Zinc in brass and tin in bronze
2) Chromium in brass and nickel in bronze
3) Nickel in brass and tin in bronze
4) Iron in brass and nickel in bronze
Q. Sodium thiosulphate (Na2S2O3) solution is used in photography to -
1) remove undecomposed (AgBr) as a soluble silver thiosulphate complex.
2) remove reduced silver
3) reduce silver bromide (AgBr) grain to silver
4) convert the metallic silver to silver salt
Q. Match List-I with List-II and select the correct answer using the code given below the lists-
List-I List-II
(a) Lactic acid 1. Tamarind
(b) Tartaric acid 2. Orange
(c) Oxalic acid 3. Tomato
(d)Citric acid 4. Citric acid
Codes:
(a) (b) (c) (d)
(A) 2 3 1 4
(B) 2 1 3 4
(C) 4 3 1 2
(D) 4 1
1) (D)
2) (A)
3) (B)
4) (C)
Q. Which one of the following is used as an explosive?
1) Nitroglycerine
2) Phosphorus trichloride
3) Graphite
4) Mercuric oxide
Q. Acute lead poisoning is also known as
1) Byssinosis
2) Neuralgia
3) Itai-itai
4) Plumbism
Q. KMnO4 can be used as a/an
1) fertiliser
2) insecticide
3) disinfectant
4) pesticide
Q. The major component in the LPG is
1) butane
2) methane
3) propane
4) ethane
Q. The most reactive among the halogens is
1) Bromine
2) Chlorine
3) Iodine
4) Fluorine
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