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Chemistry

Chemistry
Main source of lead pollution is from

Insecticides
Sewage
Tobacco
Leaded gasoline

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Chemistry
The length of double bond is _______ than single bond

None of these
Of same lenght
Longer
Shorter

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Chemistry
An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :

Generator
Uninterrupted power supply (UPS)
Battery
Power transmittor

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Chemistry
The noble gas used in radiotherapy is

Argon
Radon
Neon
Xenon

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Chemistry
Which one of the following is used to restore the colour of old oilpaintings ?

Hydrogen peroxide
Barium peroxide
Ozone
Sodium peroxide

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Chemistry
The heat value of combustion of Gasoline is

47000 kJ/kg
14600 kJ/kg
39400 kJ/kg
12600 kJ/kg

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