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Chemistry

Chemistry
The apparatus used to test acidity of aqueous solution is

Acidmeter
Hygrometer
PH meter
Ammeter

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Chemistry
The monomers of dacron are

Decane and decanol
Decanone and decanol
Ethylene glycol and terephthalic acid
Ethylene glygol and phthalic acid

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Chemistry
Which one of the following is used as preservative for foodstuff ?

Picric acid
Sodium Chloride
Sodium Benzoate
Glycerine

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Chemistry
By which organic compound all the oils are known ?

Hydrocarbon
Ester
Carbohydrate
Protein

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Chemistry
A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?

From blue to pink
From pink to blue-green
From brown to blue-black
From brown to orange-red

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Chemistry
Charcoal is used in water treatment as a/an

Solvent
Adsorbent
Coagulant
Absorbent

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