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Chemistry Questions

Question 126:

In the electrolysis of dilute sulphuric acid using platinum electrodes, the products obtained at the anode and cathode are:<br/>Anode Cathode

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A Sulphur hydrogen
B Hydrogen oxygen
C Oxygen Hydrogen
D Hydrogen sulphate ions
E Sulphur oxygen

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Question 127:

The empirical formula of an oxide of nitrogen containing 30.4 per cent of nitrogen is (N=14.0,O=16.0)

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A N<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>2</sub>
B NO
C NO<sub style='font-size: smaller;'>2</sub>
D N<sub style='font-size: smaller;'>2</sub>O
E N<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>3</sub>

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Question 128:

When a piece of charcoal enclosed in a cylinder containing air is ignited

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A The toatl volume of air is increased
B The relative amount of oxygen present is increased
C The relative amount of nitrogen present is decreased
D The relative amount of carbondioxide present is increased
E The ratio of oxygen to nitrogen in the system is increased

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Question 129:

Indicate which of the following statements is not true as we move from left to right along the periodic Table:

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A Atomic number of elements increases
B Atomic mass of elements increases
C Electropositive character of elements increases
D Electronegative character of elements increases
E Number of electrons in the outermost orbits of element increases

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Question 130:

0.1 Faraday of electricity was passed through a solution of copper (ll) sulphate. The maximum weight of copper deposited on the cathode would be [Cu = 64]

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A 64.0g
B 32.0g
C 16.0g
D 6.4 g
E 3.2g

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