Recent questions tagged science

If baking soda or fruit salt is mixed with vinegar there takes place a

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Point at which solid substance changes into liquid state it is called

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Solubility of gases increases with decrease in

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Potassium Permanganate is used for purifying drinking water, because

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Permanent hardness of water can be removed by adding

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Ionic bonds are

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Which of the following is a physical change?

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What are the soaps?

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If mass of protons and neutrons is 1, then mass of electron is

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Which of the following is used as a moderator in nuclear reactor?

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Light year is a measurement of

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Which of the following is the lightest metal?

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Water can be separated from mud by help of

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Movement of particles from an area of higher concentration to an area of lower concentration is called

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Element which is filled in thermometer due to its temperature sensitivity is called

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If carbon dioxide is passed through limewater it will form

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Actinides are the elements with atomic numbers from

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Soda water contains

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A liquid cannot be

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All matter is made up of tiny discrete particles too small to be seen was hypothesis of

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Which of the following statements is not correct?

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Find the natural indicator from the following

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Neutral solutions which do not change the colour of either red/blue litmus are known as

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Paper is manufactured by

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Jatin prepared the following set-ups to 'make rain'. The same amount of water was used for each set-up. Study them carefully to find out which set-up will form the most 'rain'?

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Water is a good solvent of ionic salts because

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Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?

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A substance which cannot be broken in to simpler substances further by any chemical reaction is called

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If both water and carbon dioxide is given to plant still it will not prepare its own food if there is lack of

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Atomic number of sodium is 11 and its atomic mass is 23, so number of protons and neutrons in an atom of sodium is

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Smallest particle of Carbon dioxide consists of

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Which of the following is the best heat insulator

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The filament of an electric bulb is made of

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More accurate and quick measure of pH value is done by

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Nitrogen helps in making of nitrogen based

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Shreya made a cup of hot tea and put a metal spoon in the cup so that the tea would cool down faster. Which of the following statements best describes the cooling of tea faster?

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In an atomic nucleus, neutrons and protons are held together by

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Sodium metal is kept under

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What is condensation?

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Which of the following is the best conductor of electricity ?

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Which of the following gases is lighter than air ?

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Parmanent hardness of water may be removed by the addition of —

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Cats eat rats. Rats eat grain. When grain is plentiful, what do you expect to happen?

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Catalytic properties of a substance may be best defined as a phenomenon of ?

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Large molecules such as polythene and polystyrene contains

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Two students of Class VI have performed the same experiment 'Separation of Sugar' by different methods as shown below: Which of the following statements are correct? <br> I. Method I is faster than method 2. <br> II. Method 2 leads to the decomposition of sugar to carbon. <br> III. Method 2 is more appropriate than method I. <br> IV Method 2 is slow but pure sugar is obtamed without getting decomposed.

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The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

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Potassium nitrate is used in

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Among the various allotropes of carbon,

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Modern model of atom shows that electrons are outside nucleus in region of high

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