Chemistry Earth’s atmosphere is an envelope of gases extending to a height of 150 km 300 km 200 km 100 km 150 km 300 km 200 km 100 km ANSWER DOWNLOAD EXAMIANS APP
Chemistry Heating of a ore below its melting point in the absence of air is known as Roasting Refining Calcination Smelting Roasting Refining Calcination Smelting ANSWER DOWNLOAD EXAMIANS APP
Chemistry An example of heterocyclic compound is Furan Anthracene Benzene Naphthalene Furan Anthracene Benzene Naphthalene ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which is the purest form of iron? Wrought iron Pig iron Steel Cast iron Wrought iron Pig iron Steel Cast iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone layer of atmosphere absorbs: Cosmic rays. Ultraviolet rays All radiations of Light Infra-red rays Cosmic rays. Ultraviolet rays All radiations of Light Infra-red rays ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following metals does not react with water to produce Hydrogen ? Sodium Potassium Lithium Cadmium Sodium Potassium Lithium Cadmium ANSWER DOWNLOAD EXAMIANS APP
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