Recent questions tagged olympiad

Some acids react with many materials and burn skin if they come in contact they are

asked Aug 10, 2017 by meena.p

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Haphazard movement of particles suspended in a liquid or gas caused by bombardment of particles by molecules of medium is

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At room temperature, most elements are in which phase of matter?

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Salt, sugar, chalk, sand are all

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Nitric acid combines with oxygen to produce brown fumes of

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When a solid substance is heated, individual molecules

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On a hot day, a glass containing ice water slowly collects liquid on the outside of the glass. Which statement best explains where this liquid come from?

asked Aug 10, 2017 by meena.p

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A group of students predicts that folding an index card into a different shape will result in a chemical change. Which step of the scientific process is this?

asked Aug 10, 2017 by meena.p

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Which gas in the atmosphere protects us from harmful ultraviolet radiations?

asked Aug 10, 2017 by meena.p

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To study changes that occur during photosynthesis

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To trace path of phosphorus, isotope of phosphorus is added to fertilizers. isotope is

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Study the given set up of an experiment . you will observe that

asked Aug 10, 2017 by meena.p

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A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called

asked Aug 9, 2017 by meena.p

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The temperature at which no more energy can be removed from matter is called

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Acids are found in many common chemicals, including foods. Acids taste:

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The effect of sting of an ant can be neutralised by rubbing with

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In hydroponics, plant's roots are immersed in solution of dissolved

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When fizzy drinks are made by adding compressed carbon dioxide acid is formed by mixing which is

asked Aug 9, 2017 by meena.p

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If mass of a substance will be lowered its density will be

asked Aug 9, 2017 by meena.p

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Element which is non-metal and is found on right side of periodic table is

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When iron and Sulphur are mixed together at room temperature there is lack of

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A large amount of heat is produced in power plants while energy is released which turns

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Which gas is produced when sludge is digested?

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An iron weight at $45$ degree celcius is dipped in a bucket containing water at $45$ degree celcius . The heat will

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The densest element so far is

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Which of the following colours is given by the phenolphthalein in a basic salt solution.

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asked Aug 8, 2017 by priyanka.c

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