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Chemistry

Chemistry
The hydronium ion is

H+
H3O+
H2+
HO -

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Chemistry
Percentage of carbon in steel ranges from

1.5 to 3.0
4.0 to 6.0
0.1 to 1.5
3.0 to 4.0

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Chemistry
For generation of biogas, the materials commonly used are

Aquatic plants
Forest residues
Crop residues
Animal wastes

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Chemistry
When formaldehyde and potassium hydroxide are heated, we get

Methane
Methyl alcohol
Ethyl formate
Acetylene

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Chemistry
The metal compound commonly found in Sindhoor or Kumkum is based on

Tin
Zinc
Copper
Lead

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Chemistry
Lead pencil contains

Ferrous sulphide
Lead sulphide
Lead
Graphite

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MORE MCQ ON Chemistry

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