91. Ceramic balls can be used to
92. Which one of the following is used in the production of explosives?
93. A mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?
94. Consider the following statements.
1. Hard soaps (common bar soaps) are the sodium salts of fatty acids.
2. Soft soaps are the potassium salts of fatty acids and semi-solid in nature.
Which of the statement(s) given above is/are correct?
1. Hard soaps (common bar soaps) are the sodium salts of fatty acids.
2. Soft soaps are the potassium salts of fatty acids and semi-solid in nature.
Which of the statement(s) given above is/are correct?
95. The basic chemical building block of natural rubber obtained from trees is
96. Acidic drain cleaners made of . . . . . . . . or . . . . . . . . add are powerful enough to clear heavy-duty hair, food, grease, soap scum or paper-based clogs in 15 minutes or less.
97. Which inorganic compound is used to manufacture soap, rayon, paper, explosives, dyes, and petroleum products?
98. The freezer in a refrigerator is fitted near the top
99. Which of the following substance is highly plastic?
100. Assertion (A) Synthetic detergents can lather well in hard water.
Reason (R) Synthetic detergents form soluble calcium and magnesium salts with hard water.
Reason (R) Synthetic detergents form soluble calcium and magnesium salts with hard water.
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