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Chemistry

Chemistry
Concentration of a material which is lethal to 50% animal is called

LC50
NOAEL
ADI
LD50

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Chemistry
Stalactites and Stalagmites form due to the precipitation of :

CaCl2
CaCO3
MgCl2
MgCO3

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Chemistry
The value of gas constant R in Ergs deg–1 mole–1 is

8.314 × 107
8.413 × 107
8.341 × 107
4.183 × 107

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Chemistry
The chemical substance present in bones and teeth is

Calcium phosphate
Calcium chloride
Calcium borate
Calcium sulphate

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Chemistry
Which of these acids is not organic in origin?

Sulphuric acid
Lactic acid
Oxalic acid
Citric acid

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Chemistry
Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water

Magnesium
Calcium
None of these
Manganese

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MORE MCQ ON Chemistry

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