Recent questions tagged olympiad

Equilibrium constant can be used to

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The plot which shows the dependence of current I on potential difference V across a resistance as shown in the figure is

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An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be :

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The lens which can form a virtual, erect, magnified image is

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A man wishes to use a concave mirror of 50cm as a magnifying glass. Upto what distance can you stand from the mirror?

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Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

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Focal length of a concave mirror depends upon

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The blue colour of the sky is due to

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The electrolytic decomposition of water gives $H_2$ and $O_2$ in the ratio of

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The power of accommodation of the eye decreases due to aging, this defect is called

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Which of the following hydroxides is most basic?

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Sodium is most likely to form a compound with which one of these elements?

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Which of the following is an example of a colloid?

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Order the following forms of matter from smallest to largest.

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Which of the following is not a source of waste water?

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In a filtration plant water is filtered using layer of

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Which of the following is a part of inorganic impurities of the sewage?

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Which of the following inhibits the seepage of rainwater into ground?

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Water cycle does not involve which of the following?

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Pollination refers to the

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Which of the following statements is/are true for sexual reproduction in plants? (i) Plants are obtained from seeds (ii) Two plants are always essential (iii) Fertilisation can occur only after pollination (iv) Only insects are agents of pollination Choose from the options given below

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Aquatic animals like fish excrete their wastes in gaseous form as

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Choose the odd one from the following options:

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The coldest region on earth is the

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Cud is the name given to the food of ruminants which is

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The enzymes present in the saliva convert

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The false feet of Amoeba are used for

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Which of the following raw material is available in the air for photosynthesis?

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Two organisms are good friends and live together. One provides shelter, water and nutrients while the other prepares and provides food. Such an association of organisms is termed as

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An element has an atomic number of 15 with which of the following elements will it show similar chemical properties.

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Which of the following gases can be used for storage of fresh sampel of an oil for a long time?

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Nail polish remover contains ?

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Conditions for equilibrium of concentration of reactant and products will be same if

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The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as

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Strands of DNA are held together by

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Pick from the following one chemical used to disinfect water

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Methyl orange is

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Forests are not responsible for

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An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be :

asked Sep 13, 2017 by meena.p

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In the reaction $2PbO + C \to 2Pb + CO_2$ (a) lead is getting reduced (b) carbon dioxide is getting oxidised (c) lead oxide is getting reduced. (d) carbon is getting reduced.

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Which of the products is not obtained from a forest?

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Addition of hydrogen to ethene forms

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"Every Drop Counts" is a slogan related to

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In magnetic separation, magnets are used to separate

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Which type of soil dries out quickly after a rain?

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The inert gases are ____ in water

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The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of

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The ovaries of different flowers may contain

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The 'eyes' of the potato plant is what

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In which of the following parts of human body are sweat glands absent?

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