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Chemistry

Chemistry
Slag is a name given for

Molten sand
Molten iron
Molten calcium silicate
Molten alumina

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Chemistry
What is the mass percentage of oxygen in carbon dioxide (CO2)

0.727
0.509
0.305
0.658

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Chemistry
Which of the following is the correct sequence of countries in terms of maximum carbon dioxide emission?

China, USA, European Union, India
China, India, European Union, USA
USA, India, China, European Union
European Union, China, USA, India

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Chemistry
The percentage of nitrogen present in ammonium sulphate is :

0.25
0.18
0.27
0.305

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Chemistry
Which one of the following metals is used to galvanise iron ?

Copper
Zinc
Mercury
Lead

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Chemistry
Which metal does not undergo corrosion due to the formation of oxide layer?

Zinc
Copper
Aluminium
Iron

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MORE MCQ ON Chemistry

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