| Objective General Knowledge |
| Q. | Which one of the following processes of weathering belongs to both mechanical and chemical weathering? | | | 1 | Hydration | | | 2 | Exfoliation | | | 3 | Crystallisation | | | 4 | Carbonation | | | Ans: 3 |
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| Q. | The reaction that takes place in soap making is called saponification. Basically soap is sodium or potassium salts of | | | 1 | long chain monocarboxylic acids | | | 2 | long chain dicarboxylic acids | | | 3 | long chain tricarboxylic acids | | | 4 | glycerol | | | Ans: 4 |
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| Q. | The metal constituent of chlorophyll is | | | 1 | Potassium | | | 2 | Iron | | | 3 | Magnesium | | | 4 | Manganese | | | Ans: 3 |
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| Q. | During explosion of gunpowder, which of the following gases are evolved in the proportion of 1:3? | | | 1 | Nitrogen : Oxygen | | | 2 | Oxygen : Nirtogen | | | 3 | Nitrogen : Carbon dioxide | | | 4 | Carbon dioxide : Nitrogen | | | Ans: 3 |
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| Q. | The major component used in preparation of different types of glasses is | | | 1 | Sodium borate | | | 2 | Silica | | | 3 | Sodium silicate | | | 4 | Calcium silicate | | | Ans: 2 |
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| Q. | The main constituent of vinegar is | | | 1 | Citric acid | | | 2 | Ascorbic acid | | | 3 | Acetic acid | | | 4 | Tartaric acid | | | Ans: 3 |
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| Q. | The elements of a group in the periodic table- | | | 1 | are isobars | | | 2 | have consecutive atomic numbers | | | 3 | have similar chemical properties | | | 4 | are isotopes | | | Ans: 3 |
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| Q. | The pH of fresh groundwater slightly decreases upon exposure to air because - | | | 1 | carbon dioxide from air is dissolved in the water | | | 2 | oxygen from air is dissolved in the water | | | 3 | the dissolved oxygen of the groundwater escapes into air | | | 4 | the dissolved carbon dioxide of the groundwater escapes into air | | | Ans: 4 |
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| Q. | Which one among the following nontoxic gases helps in formation of enzymes which ripen fruit? | | | 1 | Methane | | | 2 | Acetylene | | | 3 | Ethane | | | 4 | Carbon dioxide | | | Ans: 2 |
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| Q. | Age of fossil may be found out by determining the ratio of two isotopes of carbon. The isotopes are - | | | 1 | C-12 and C-13 | | | 2 | C-13 and C-14 | | | 3 | C-12 and C-14 | | | 4 | C-12 and carbon black | | | Ans: 3 |
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