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Catalytic converters are generally made from:
The soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomic clocks is:
The mercury and sodium street lamps light up because of:
The green colour seen in firework displays is due to the chloride salt of:
Most commonly used bleaching agent is:
Peroxyacetyl nitrate is a:
Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen?
What happens when a drop of glycerol is added to crushed KMnO₄ spread on a paper?
Which of the following can be found as pollutants in the drinking water in some parts of India?
1. Arsenic, 2. Sorbitol, 3. Fluoride, 4. Formaldehyde, 5. Uranium
Select the correct answer using the code given below:
Photochemical smog is a resultant of the reaction among:
When a helium atom loses an electron it becomes:
Heavy metals got their name because compared to other atoms they have:
The purest form of Iron is:
Combustion is a:
Which of the following is not a form of carbon?
Natural radioactivity was discovered by:
Which of the following is used in pencils?
The rusting of metal iron in air needs both:
Acid rain is caused by:
The process of improving the quality of rubber by heating it with sulphur is called:
The pollutant responsible for ozone holes is:
The alkaloid naturally found in coffee, cocoa and cola nut is:
Which of the following is not a noble gas?
Ink is prepared from:
Formic acid is produced by:
Chemical decomposition of an organic compound by water is called as:
Which of the following is not a nitrogenous fertilizer?
CaC₂ on treatment with water gives:
The percentage of nitrogen present in ammonium sulphate is:
Stains of rust on clothes can be removed by:
Ethanol containing 5% water is known as:
Transboundary pollution or Acid rain is caused by:
The natural disaster in which carbon dioxide suddenly erupts from deep lake water is known as:
Dry Ice is nothing but:
Which one of the following is obtained as slag in a blast furnace?
When H₂ gas is allowed to expand from a region of high pressure to a region of low pressure the temperature of the gas:
In the industrial production of vegetable ghee, the process involved is:
Which of the following weeds has been found useful to check water pollution caused by industrial affluents?
Pyroligneous acid obtained from wood contains:
Which of the following pairs is correctly matched?
Which is not a correct statement?
Which of the following could be used as fuel in propellant or rockets?
The addition of gypsum to portland cement helps in:
The Refrigerant ‘FREON’ is:
Hard steel contains:
Cement is formed by strongly heating a mixture of:
Glass is a:
The temperature of oxy-acetylene flame is around:
The gas that is used in the manufacture of vanaspati ghee is: