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WorksheetsRehearsal Examination Chemistry Gr 12
Total questions: 24
Worksheet time: 24mins
What is your full name?
What is your father name?
Admission number?
Class and Section
Why the density of K is unusually low?
because it is alkaline earth metal
because it is not a metal
it is more reactive
because of its unusual increase of atomic size
A metal is thrown in water and picture is showing its reaction with water. This metal should be ____________.
Al
Pb
Na
Ni
Which of the following metal is metalloid?
Carbon
Germanium
Tin
Lead
The electronic configuration of an element is given below,
[Ar] 4s² 3d²
Which set of variable oxidation state it can posses?
1, 2
2, 3
2, 3, 4
3, 4, 5
What is the color of precipitates formed when NaOH is added to Fe+2 solution.
Yellow
White
Green
Brown
This structure of functional group represents _____________ molecules.
Amine
Nitrile
Nitro
Arene
To detect Sulphur in an organic compound which of the following should be added to Lassaigne's filtrate?
FeSO4
CH3COOH
AgNO3
CuO
What is the name of this compound?
di-ethyl ethane
3-ethylbutane
3-methylpentane
n-hexane
Which Structural isomerism these two molecules posses?
Cain
Position
Functional group
Metamerism
What is the name of this compound?
1-methyl-3,5-dinitrobenzene
1,3-dimethyl-5-nitrobenzene
5-methyl-1,3-dinitrobenzene
1-methyl-3,5-nitrobenzene
In benzene ring, the carbon in carbon-carbon bond is _____________ hybridized.
sp3
sp2
sp
dsp3
Acidic hydrogen is present in ____________.
Acetylene
Ethane
Benzene
Ethene
The alkyl halide in picture is called ______________ alkyl halide.
primary
secondary
tertiary
In this SN reaction, R-X acts as _________________.
Nucleophile
Leaving group
Substrate
Substitution nuclear bimolecular mechanism of alkyl halide reactions, occurs in _______________ step.
one
two
three
four
Which of the following carbocation is most stable carbocation?
Primary
Secondary
tertiary
methyl
The common name of this compound is _____________.
Catechol
Resorcinol
Hydroquinone
picric acid
Which hydrogen is called alpha hydrogen? The hydrogen on carbon ____________.
1
2
3
4
Triglycerides are ______________ lipids.
Primary
Compound
Derived
Which of the following gas is produced due to incomplete combustion of petrol in internal combustion engine?
SO2
SO3
CO
CH4
