Q. Washing soda is chemically represented by

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Q. Magnesium and calcium __________ cause temporary hardness of water.

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Q. Which form of sulphur is the most stable at room temperature ?

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Q. Vegetable oils and fats basically differ in their

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Q. Average sulphur content in Indian pyrites is about __________ percent.

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Q. Oil is a/an

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Q. Which of the following is a constituent of coffee ?

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Q. Blue vitriol is chemically

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Q. Trinitro-toluene (TNT) is

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Q. Thorium is mainly used

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Q. During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to

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Q. Good quality of edible salt is obtained from brine by the process of

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Q. Which of the following is the main constituent of the mother liquor produced in salt industry ?

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Q. Silicon carbide is a/an

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Q. Oxygen is produced by fractionation of air using __________ process.

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Q. Trinitrotoluene (TNT), an explosive, is made by the nitration of

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Q. Which of the following is used as a coagulant in treating turbid water ?

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Q. Nicotine is

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Q. Separation of fresh water from sea water can be done by the __________ operation.

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Q. Na₂CO₃.10H₂O is called

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