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Chemistry

Chemistry
The percentage of carbon in cost iron is :

0.5 to 1.5
3 to 5
6 to 8
0.01 to 0.25

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Chemistry
Sea water is saltier than rain water because

Sea animals are salt producing
Sea beds have salt producing mines
The air around the sea is saltish
Rivers wash away salts from earth and pour them into the sea

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Chemistry
0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by

6
3
4
7

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Chemistry
Muscle fatigue is caused by the accumulation of :

Pyruvic acid
Lactic acid
Uric acid
Oxalacetic acid

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Chemistry
Conversion of chemical energy into electrical energy occurs in

Dynamo
Electric heaters
A battery
Atomic bombs

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Chemistry
Where does the oxygen that keeps us alive come from?

Water
Oxides of minerals
Carbonates absorbed from soil
Carbon dioxide

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MORE MCQ ON Chemistry

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