81. Synthetic gas is a mixture of
82. Which of the following gases is obtained when metals react with dilute acids?
83. Which of the following is not a metalloids?
84. Which of the following are some important pollutants released by steel industry in India?
1. Oxides of sulphur
2. Oxides of nitrogen
3. Carbon monoxide
4. Carbon dioxide
Select the correct answer:
1. Oxides of sulphur
2. Oxides of nitrogen
3. Carbon monoxide
4. Carbon dioxide
Select the correct answer:
85. Which of the following is used by dentists as a substitute for anaesthetic?
86. . . . . . . . . is discovered by Henry Cavendish in 1766 and named it by Levassie.
87. Solid iodine has a colour.
88. The gas which turns lime water milky is
89. Identify non-metal from the following elements.
90. Elements with atomic numbers 10, 18, 36, 54 . . . . . . . .
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