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It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of

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Water can be separated from alcohol water mixture by Which of the following elements has the smallest atomic radius in the fourth period? The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is Match the following columns. Column-I Column-II a. Soap suds 1. Emulsion b. Silt in water 2. Foam c. Opal 3. Sol d. Mayonnaise 4. Gel Which of the elements do not fall in stair case of the modern periodic table__________________?