Chemistry
Chemistry Challenge Quiz
Test your knowledge of chemistry with our engaging quiz! Featuring 21 carefully curated questions, this quiz covers various topics from chemical reactions to the properties of elements.
Challenge yourself and learn something new today!
- Multiple choice questions
- Focus on fundamental chemistry concepts
- Perfect for students and enthusiasts alike
Which information is not conveyed by a balanced chemical equation?
Physical states of reactants and products
Symbols and formulae of all the substances involved in a particular reaction
Number of atoms/molecules of the reactants and products formed
Whether a particular reaction is actually feasible or not
Chemically rust is
Hydrated
Only ferric oxide
Hydrated ferric oxide
None of these
Both CO2 and H2 gases are
Heavier than air
Colourless
Acidic in nature
Soluble in water
Which of the following gases can be used for storage of fresh sampel of an oil for a long time?
Carbon dioxide or oxygen
Nitrogen or helium
Helium or oxygen
Nitrogen or oxygen
The electrolytic decomposition of water gives H2 and O2 in the ratio of
1 : 2 by
2 : 1 by volume
8 : 1 by mass
1 : 2 by mass
In the decomposition of lead (II) nitrate to give lead (II) oxide, nitrogen dioxide and oxygen gas, the coefficient of nitrogen dioxide (in the balanced equation) is
1
2
3
4
The chemical formula of lead sulphate is
Pb2SO4
Pb(SO4)2
PbSO4
Pb2(SO4)3
Pb(SO4)2
Pb2SO4
Fatty foods become rancid due to the process of
Oxidation
Reduction
Rancidity
Decomposition
We store silver chloride in a dark coloured bottle because it is
a white solid
Under goes redoc reaction
To avoid action by sunlight
None of the above
Silver article turns black when kept in the open for a few days due to formation of
H2S
AgS
AgSO4
Ag2S
When crystals of lead nitrate are heated strongly in a dry test tube
Crystals immediately melt
A brown residue is left
White fumes appear in the tube
A yellow residue is left
Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The following observations are recorded. Point out the correct observation.
The surface of metal becomes shining
The reaction mixture turns milky
Odour of a pungent smelling gas is recorded
A colourless and odourless gas is evolved
When carbon dioxide is passed through lime water,
calcium hydroxide is formed
White precipitate of CaO is formed
lime water turns milky
colour of lime water disappears.
When a magnesium ribbon is burnt in air, the ash formed is
black
White
Yellow
Pink
In which of the following, heat energy will be evolved?
Electrolysis of water
Dissolution of NH4Cl in water
Burning of L.P.G.
Decomposition of AgBr in the presence of sunlight
Rancidity can be prevented by
adding antioxidants
Storing food away from light
keeping food in refrigerator
All of them
The reaction of H2 gas with oxygen gas to form water is an example of
Combination
Redox
Exothermmic
All of the above
The reaction in which two compound exchange their ions to form two new compounds is called
Double displacement
Displacement
Redox
Combination
On immersing an iron nail in CuSO4 solution for few minutes, you will observe
No reaction takes place
The colour of solution fades away
the surface of iron nails acquire a black coating
The colour of solution changes to green
An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substance X and Y are
X = Fe, Y =fe2o3
X = Ag, Y = Ag2S
X = Cu, Y = CuO
X = Al, Y = Al2O3 Fe2O3
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