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Which gas is used as fire extinguisher?
Which one of the following is extensively used for sterilizing water?
Which mixture of gases is mainly stored as a liquid under pressure in LPG cylinder?
The major constituent of air is:
Which of the following organisms is most likely to produce greenhouse gases such as nitrous oxide and methane?
Rusting of iron takes place due to:
The highest grade and best equality coal is:
German silver used for making utensils is an alloy of:
The purity of gold is expressed in carats. The purest form of gold is:
Petroleum consists of a mixture of:
The lustre of the metals is because of:
One of the following is used to dissolve noble metals. That is:
An emulsion is a colloid of a:
Percentage of carbon in steel ranges from:
Which of the following is not present in German-silver?
The major harmful gas emitted by automobile vehicles which causes air pollution is:
Which one of the following is a major green house gas?
The chemical name of ‘Common salt’ is:
Denatured spirit is ethanol mixed with:
The metal, which is a constituent of vitamin B₁₂ is:
The most abundant inert gas in the atmosphere is:
Which metal is extracted from seawater?
Percentage of lead in lead pencils is:
Helium has is used in gas balloons instead of hydrogen gas because it is:
The gas used in the artificial ripening of fruits is:
Ruby and sapphire are oxides of:
The gas which turns into liquid at the lowest temperature among the following is:
Gunpowder consists of a mixture of:
Which of the following is the sweetest sugar?
In nuclear reactors, graphite is used as a/an:
The process involved in making soap is:
Sea water can be purified by the process of:
The compound to which H2 does not add is:
Ammonal is a mixture of:
Which gas does not form the part of atmosphere?
The fuel used in an atomic reactor is:
The major constituent of gobar gas is:
The isotope of Uranium used in atomic reactors is:
Which one of the following is not a radio-active element?
The greenhouse effect is caused by the higher level of which gas in the atmosphere?
Candle is a mixture of:
Ethanol containing 5% water is known as:
Brass is an alloy of copper and:
The density of a gas is maximum at:
The important ore of aluminium is:
Aqua regia is a 1 : 3 mixture, by volume, of:
What is the maximum Water Vapour content in the atmosphere?
The amount of chlorine available in water after disinfection is called as:
What are the major pollutants of cigarette smoke?
Zinc sulphide is commonly used as: