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Chemistry

Chemistry
The most reactive among the halogens is

Fluorine
Iodine
Bromine
Chlorine

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Chemistry
Bauxite is an alloy of which of the following metals ?

Silver
Tin
Iron
Aluminium

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Chemistry
Which one is the lightest element in the periodic table

Helium
Carbon
Hydrogen
Oxygen

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Chemistry
Periodic table contains how many periods

7
8
6
10

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Chemistry
The number of neutrons present in an element having mass number 226 and atomic number 88 is :

314
50
138
88

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Chemistry
Wax used for making candle is chemically a mixture of

Aliphatic hydrocarbons
Cyclic hydrocarbons
Aromatic hydrocarbons
Aliphatic and aromatic hydrocarbons

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