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Chemistry

Chemistry
The cathode of a lead storage battery is made up of

Manganese dioxide
Zinc
Lead oxide
Lead

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Chemistry
How many neutrons are there in 92U238 atom ?

146
92
330
238

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Chemistry
Sea water is saltier than rain water because

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

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Chemistry
Which of the following gases is mixed with oxygen for breathing by divers in aqua lungs?

Helium
Nitrogen
Hydrogen
Methane

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Chemistry
White phosphorus is generally kept under

Kerosene oil
Alcohol
Glycerine
Water

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Chemistry
When iron rusts, its weight

Increases
Decreases
First increases and then decreases
Remains the same

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MORE MCQ ON Chemistry

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