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Chemistry

Chemistry
Chemical formula of washing soda is

Na2SO4.10H2O
Ca(OH)2
Na2CO3.10H2O
NaHCO3

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Chemistry
Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below.(A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium

A, B, C, D and E
B, D and E
A and C
A, C and E

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Chemistry
Nylon is made up of :

Polypropylene
Polyester
Polyamide
Polyethylene

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Chemistry
Urea is a

Potassium fertilizer
Phosphatic fertilizer
Sodium fertilizer
Nitrogenous fertilizer

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Chemistry
Bridgmanite is

Name of a game
Name of a music
A bridge on the river Thames
Earth’s most abundant minera

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Chemistry
Hydrogen is not found in atmosphere because

It is the lightest gas
It is highly inflammable
It immediately combines with oxygen to form water
It is absorbed by plants

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