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Increase in temperature increases the solubility. For example, it is easier to dissolve sugar in hot milk than in cold mi..

'Geo' means earth and 'thermal' means heat. Thus geothermal energy is that heat energy obtained from hot rocks present inside the earth. This heat can be used as a source of energy to produce electricity. You know that the innermost layer of the earth is called the core. Above the core a..

'Geo' means earth and 'thermal' means heat. Thus geothermal energy is that heat energy obtained from hot rocks present inside the eart..

Question: Though a hot iron emits radiations, it is not visible to us. Why? Answer: It emits infra-red radiations which are invisible to the eye..

High fever, headache, body ache, nausea and violent shivering (rigours) are some of the symptoms of malaria. Each malarial attack lasts for 6-10 hours and consists of the cold stage (shivering), hot stage (fever) and sweating stage (temperature goes down to normal). The fever is repeated..

Question: Name the following: 1) A molten metal that catches fire in chlorine gas and gives off white fumes 2) A metal that forms two types of oxides and rusts in moisture; write their formulae also 3) A metal used in hot water systems 4) A metal used in long distance cables wires 5)..

The occurrence of starch in the leaves proves that photosynthesis has taken place. Starch can be tested with the help of iodine solution. This is done in the following manner: The leaf is first decolourised by treating it in 90% ethanol (alcohol) solution. It is then rinsed in hot wate..

Question: The radiations emitted by a hot furnace are ______. 1. ultra-violet 2. infra-red 3. X-rays 4. micro waves Answer: ..

A chemical formula that represents the composition of a molecule of the substance in terms of the symbols of the elements present in the molecule is also called molecular formula. Discrete molecules can be described by this formula. As it represents one molecule of the substance giving the names an..