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Chemistry

Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Magnesium
Silicon
Oxygen
Iron

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Chemistry
Which of the following is the strongest base in aqueous solution ?

Ammonia
Ethylamine
Diethylamine
Triethylamine

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Chemistry
Aspirin is common name of

Salicylate
Acetyl Salicylic Acid
Salicylic Acid
Methyl Salicylate

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Chemistry
Formation of ozone hole is maximum over

India
Africa
Antarctica
Europe

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Chemistry
The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :

Alloy formation
Vulcanization
Galvanization
Zinc plating

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Chemistry
Which of the following laser types is used in a laser printer?

Semiconductor laser
Dye laser
Gas laser
Excimer laser

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