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CHEMISTRY

Chemistry
What material is used to make electric heater coil ?

Iron
Nichrome
Silver
Copper

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Chemistry
Among the following, which is always found in free-state in nature?

Sodium
Gold
Copper
Silver

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Chemistry
Philosopher’s Wool is

Zinc oxide
Zinc carbonate
Zinc blende
Zinc sulphate

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Chemistry
Which of the following metals has least melting point ?

Mercury
Silver
Gold
Copper

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Chemistry
Which one is the most reactive gaseous element

Iodine
Flourine
Bromine
Chlorine

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