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Chemistry

Chemistry
PH value between 6.5-7.5 makes the soil

Acidic
Basic
Neutral
None of these

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Chemistry
One of the constituents of tear gas is

Ether
Ethanol
Chloropicrin
Ethane

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Chemistry
Percentage of lead in lead pencils is

31-66
80
40

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Chemistry
Gypsum is used for improvement of:

Saline soils
Podsols
Acidic soils
Alkaline soils

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Chemistry
How many electrons in a Hydrogen atom

Four
One
Two
Three

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Chemistry
An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is

17
19
53
36

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