Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,
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1992
There is a large temperature interval between the melting point and the boiling point of a metal because?
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1992
If 100 cm3 of oxygen pass through a porous plug in 50 seconds, the time taken for the same volume of hydrogen to pass through the same porous plug is?(O = 16, H = 1)
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1992
Which of the following is a measure of the average kinetic energy of the molecules of a substance?
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1992
A given mass of gas occupies 2 dm3 at 300k. At what temperature will its volume be doubled keeping the pressure constant?
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1992
wH2SO4 + xAI(OH)3 → yH2O + = zAI2(SO4)3. The respective values of w.x.y and z in the equation above are?
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1992
How many moles of (H+) are there in 1 dm3 of 0.5 M solution of H2SO4?
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1992
The pollutants that are likely to be present in an industrial environment are?
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1992
147N + X → 178O + 11 H. In the above reaction, X is a?
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1992
How many lone pairs of electron are there on the central atom of the H2O molecules?
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1992
The nucleus of the isotope tritium, contains?
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1992
An increase in temperature causes an increase in pressure of a gas in a fixed volume due to an increase in the?
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1992
An emulsion paint consists of ?
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1992
On which of the following is the solubility of a gaseous substance dependent? I. Nature of solvent II. Nature of solute III. Temperature IV. Pressure
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1992
Water for town supply is chlorinated to make it free from?
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1992
Which of the following gases dissolves in water vapour to produce acid rain during rainfall?
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1992
Four elements P,Q,R and S have 1,2,3, and 7 electrons in their outermost shells respectively. The element which is unlikely to be a metal is?
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1992
Copper (II) tetraoxosulphate (VI) solution is electrolyzed using carbon electrodes. Which of the following are produced at the anode and cathode respectively ?
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1992
How many grams of H2SO4 are necessary for the preparation of 0.175 dm3 of M 6.00 M H2SO4?(S = 32.06, O = 16.00 H = 1.00)
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1992
Arrange HCI, CH3COOH, C6H5CH3 in order of increasing conductivity.