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Chemistry

Chemistry
Major gaseous pollutant of the thermal power station is

NH3
SO2
H2 S
NO2

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Chemistry
Hard steel contains

0.1 to 0.4 per cent carbon
0.5 to 1.5 per cent carbon
2 to 5 per cent carbon
0.01 to 0.04 per cent carbon

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Chemistry
Catalyst is a substance which

Decreases the rate of reaction
None of these
Increases the rate of the reaction
Has no action on the rate of the reaction

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Chemistry
The elements with atomic numbers 9, 17, 35, 53, 85 are all

Halogens
Light metals
Heavy metals
Noble gases

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Chemistry
Identify the metal which is non toxic in nature.

Cobalt
Chromium
Gold
Cadmium

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Chemistry
In which of the following ions , the colour is not due to d-d transition ?

[CrO4]2−
[CoF6]3+
[Ti(H2O)6]3+
[Cu(NH3)4]2+

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