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Chemistry

Chemistry
The trans-uranium elements are the chemical elements with atomic numbers greater than

86
96
92
89

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Chemistry
Saline soil contains

None of these
High concentration of salt
Lot of moisture
Hard rocks

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Chemistry
The compound that has the least value for octane number is :

Iso-octane
2-methyl heptane
2,2-dimethyl hexane
N-heptane

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Chemistry
Helium gas is used in gas balloons instead of hydrogen gas because it is

Non-combustible
More stable
Lighter than hydrogen
More abundant than hydrogen

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Chemistry
Sea water is saltier than rain water because

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

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Chemistry
Which variety of coal contains recognisable traces of the original plant material ?

Bitumen
Anthracite
Lignite
Peat

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MORE MCQ ON Chemistry

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