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Chemistry

Chemistry
Which one is the most reactive gaseous element

Bromine
Iodine
Chlorine
Flourine

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Chemistry
The most important ore of aluminium is

magnetite
haematite
bauxite
monazite

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Chemistry
Among the following iron ores, the highest percentage of iron content is found in–

Limnonite
Magnetite
None of these
Haemetite

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Chemistry
0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by

4
6
7
3

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

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

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Chemistry
The addition of gypsum to portland cement helps in :

Preventing rapid setting of cement
Rapid setting of cement
Increasing the strength of cement
Reduction in the cost of cement

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MORE MCQ ON Chemistry

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