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Chemistry

Chemistry
Earth’s atmosphere is an envelope of gases extending to a height of

200 km
100 km
150 km
300 km

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Chemistry
If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?

Ten million
One million
Half a million
Two million

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Chemistry
Chemical formula of washing soda is

Na2SO4.10H2O
Na2CO3.10H2O
Ca(OH)2
NaHCO3

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

0.273
0.323
0.201
0.158

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Chemistry
The chief constituent of vinegar is

Salycylic acid
Formic acid
Acetic acid
Oxalic acid

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Chemistry
A subshell with l=2 can take up

8 electron
10 electron
5 electron
3 electron

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MORE MCQ ON Chemistry

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