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Chemistry

Chemistry
Periodic table contains how many periods

8
10
7
6

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Chemistry
Urea is a

Nitrogenous fertilizer
Phosphatic fertilizer
Sodium fertilizer
Potassium fertilizer

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Chemistry
The graphite rods in the nuclear reactor

undergo combustion which triggers the nuclear fission
convert fast moving neutrons into thermal neutrons
react with U to release energy
produce neutrons

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Chemistry
The strongest acid of the following is

P-nitrophenol
O-nitrophenol
P-chlorophenol
M-nitrophenol

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Chemistry
Epsom salt is used

In paper industry
In making tooth paste
In softening water
As purgative

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Chemistry
What material is used to make electric heater coil ?

Iron
Copper
Nichrome
Silver

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