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Chemistry

Chemistry
Lead in water can cause

Eye disease
Hair falling
Arthritis
Kidney damage

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Chemistry
The three elements most needed in common fertilisers are :

Calcium, Phosphorous and Potassium
Sulphur, Phosphorous and Sodium
Phosphorous, Sodium and Nitrogen
Nitrogen, Potassium and Phosphorous

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Chemistry
The percentage of Nitrogen in Air is

0.94
0.03
78.03
85.02

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Chemistry
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

ozone
methane
oxygen
helium

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

–4
Zero
8
4

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Chemistry
Which of the following is the petroleum wax ?

Bees wax
Carnauba wax
Paraffin wax
Jojoba wax

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MORE MCQ ON Chemistry

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