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Chemistry

Chemistry
Charcoal is used in water treatment as a/an

Absorbent
Coagulant
Adsorbent
Solvent

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

ADI
NOAEL
LD50
LC50

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Chemistry
Solder is an alloy of

Lead, zinc
Sodium, lead
Tin, lead
Copper, lead

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

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

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Chemistry
Which among the following is found in chlorophyll ?

Ca2+
Fe2+
A l3+
Mg2+

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Chemistry
Which one of the following is an example of a gel ?

Face cream
Shaving cream
Cheese
Milk

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