General Knowledge Quiz - General Science - Chemistry - Chemical Reactions & Equations:
1.
CaO Reacts with water to form ____
1.CaCO3 2.Ca(OH)2
3.CaCl2 4.Ca(NO3)2
2.
Tarnishing of silver ware (black coating on silver) is due to ____
1. Rancidity 2.Corrosion
3. Hydrogination 4.Reduction
3.
N2 + O2 à
2NO – Q.
This
is ---- Reaction
1.Reduction 2.Endothermic
3.Exothermic 4.Decomposition
4.
The Chemical equation
BaCl2 + Na2SO4 --> BaSO4 +
2NaCl
Represents
_____ type of chemical reaction
1.Combination 2.Decomposition
3.Displacement 4.Double-displacement
5.
In The absence of ___ The development of rancidity is retarted
1.Light 2.Heat
3.Chemicals 4.Vitamins
6.
Bleaching of coloured objects can be done by using ____
1.Chlorine 2.Moist
chlorine
3.White colour 4.Dyes
7.
Two or more metals or a metal and a non-metal combine and form a new substance
is called ____
1. Allotrope 2.Alloy
3. Reagent 4.Rancidation
8.
___ is a method of protecting iron from rusting by coating them a thin layer of
Zinc.
1.Galvanizing 2.Painting
3.Rusting 4.Heating
9.
The decomposition of vegetables into compost is an example of ___ reaction.
1.Oxidation 2.Reduction
3.Rancidity 4.Corrosion
10.
The gas liberated when Zing Carbonate decomposes is ____
1.O2 2.CO2
3.NO2 4.H2
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