1. If the voltage range below . . . . . . . ., methanometer of D6 will give faulty reading.
2. Incubation period of singareni coal field is
3. The given mass of gas is subjected to a change of pressure and temperature at one and the same time called
4. For every 5% black damp corresponding to . . . . . . . .% of reduction in the O2 percentage.
5. CO in the air turns the light yellow of potassium palladium sulphate to . . . . . . . .
6. What is the ignition temperature of CO.
7. The weight of AFD . . . . . . . . with battery.
8. The ratio to the kata factor to time in seconds for alcohol to fall from upper mark to lower mark called
9. A blotting paper soaked in lead acetate changes its colour to black in the presence of . . . . . . . . gas.
10. Colour of nitrous fumes are
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