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Chemistry

Chemistry
The material used in the manufacture of lead pencil is

Graphite
Mica
Lead
Carbon

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Chemistry
Which amidst the following is not a gem stone ?

Opal
Cat's-eye
Topaz
Pearl

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Chemistry
Sour taste of ‘Coca Cola’ is due to the presence of

Formic acid
Hydrochloric acid
Acetic acid
Phosphoric acid

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Chemistry
Aerated water contains

CO2
H2
NO2
SO2

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Chemistry
Taj Mahal is greatly affected due to :

Tourists
Deforestation
Acid rain
Sound pollution

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Chemistry
Which of the following partial miscible liquid pairs has both lower and upper critical solution temperature

Water and Phenol
Aniline and n-hexane
Glycerine and m-toluene
Water and diethyl aniline

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