Question 21 : The main chemical constituent of clay is
1. silicon oxide
2. aluminium borosilicate
3. zeolites
4. aluminium silicate
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Question 22 : The ore which is found in abundance in India is
1. monazite
2. fluorspar
3. bauxite
4. magnetite
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Question 23 : The most malleable metal is
1. platinum
2. silver
3. iron
4. gold
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Question 24 : The material which can be deformed permanently by heat and pressure is called a
1. thermoplastic
2. thermoset
3. chemical compound
4. polymer
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Question 25 : The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
1. cineole
2. engenol
3. geraniol
4. limonene
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Question 26 : The mineral containing both magnesium and calcium is
1. magnesite
2. calcite
3. carnallite
4. dolomite
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Question 27 : The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
1. Dalton's law
2. Gay Lussac's law
3. Henry's law
4. Raoult's law
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Question 28 : Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
1. 2:16:02
2. 2:16:01
3. 1:16:02
4. 1:01:01
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Question 29 : The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
1. 1.568 x 10³
2. 6.023 x 10¹⁹
3. 4.84 x 10¹⁷
4. 6.023 x 10²³
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Question 30 : The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
1. liquation
2. leaching
3. levigation
4. magnetic separation
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