You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.
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If you are provided with some vegetables to cook. You generally add salt into the vegetables during cooking process
Exosmosis.......
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You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
On heating the powder, it will char if it is a sugar. Alternatively, the powder may be dissolved in water and checked for its conduction of electricity. If it conducts,...
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You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution
(a) Put the red litmus paper turn by turn in each of the three test tubes. The solution which turns the red litmus paper to blue will be a basic...
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You were blindfolded and asked to identify the drinks provided in two different glasses.
With the help of different types of taste buds present in the tongue.
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You are given a transparent glass sheet. Suggest any two ways to make it translucent without breaking it.
(i) By applying oil, grease, butter on it or pasting a butter paper on it. (ii) Grinding (rubbing) the surface of the glass by any abrasive material.
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Three identical iron bars are kept on a table. Two out of three bars are magnets.
The magnet with known poles will attract and repeat two ends of a magnet and attend both the end of an ordinary bar. (Test for repulsion)
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A spinning wheel is brought in contact with an identical wheel spinning at identical speed.
The correct answer is: (a), (c) (a), kinetic (c) mechanical
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You have been given some mishri pieces (lumps of sugar). Suggest some ways to dissolve them quickly.
To dissolve the mishri quickly. First it should be crushed to make powder of it. Then after adding it into water, the mixture should be stirred thoroughly. The mixture could also...
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mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels.
(d) Viscocity of Kerosene is alert among all, so it will emptied first.
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A square is divided into 9 identical smaller squares. Six identical balls are to be placed in these smaller
(d) Total number of ways in which 9 balls occupy any of the 6 squares = 9C6 = 84 Number of ways in which one row is not filled = 3 ∴...
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