Test Preparation on IIT JEE Mains Mock Test-1&2
CHEMISTRY: paper 1
1-Butyne reacts with hot alkaline KMnO4 to produce
Hot alkaline KMnO4 oxidizes 1-butyne to
CH3CH2COOH and CO2
Reduction of benzoyl chloride with H2/Pd/BaSO4 produces
Benzoyl chloride is reduced to benzaldehyde.(Rosenmund’s reduction).
In a reaction A →B, the rate of reaction increases two times on increasing the concentration of reactant four times. Then order of reaction is
Since rate increases 2 times on increasing the
initial concentration of reactant 4 times, rate
depends upon ½ power of the concentration, i.e.,
Rate = k[A]1/2, therefore order of reaction is 1/2 .
A current of 2 amperes is passed through a solution of H2SO4 for 20 minutes. The volume of oxygen liberated at STP is:
Q = I x t = 2 x 20 x 60 (s) =2400 C
2H2O → O2 + 4 H+ + 4 e
4 x 96500 C are required to liberate O2 = 22.4 mL
2400 C will liberate O2 =(22.4/4 x 96500)x 2400 =0.1392L
Which of the following is not an aromatic compound?
Cyclobutadiene is an antiaromatic compound; it
contains 4π electrons in a cyclic conjugated
system. Benzene, o-xylene and picric acid are
aromatic compounds according to Huckel’s rule of.aromaticity.
Which one of the following is not coloured?
Cu2+, Fe2+and Fe3+ complexes are coloured
because of presence of unpaired d-electrons;
Cd2+complex is colourless because all electrons in
d-subshell (d10 case) are paired.
The enthalpy change of reaction does not depend upon_
The enthalpy change depends upon the final and
initial state of the reaction; the intermediates do
not effect overall enthalpy change of a reaction.
The compressibility factor for an ideal gas is
For an ideal gas, compressibility factor, Z =pv/nRt
=1
Calcium is obtained by:
Calcium can be obtained by electrolysis of molten
CaCl2
Hexyne-3 reacts with Na/NH3 to produce:
Alkynes react with sodium metal in liquid
ammonia to form trans alkenes.
The formation of polyethene from calcium carbide takes place as follows:
CaC2 + 2HOH →Ca(OH)2 + C2H2
C2H2 + H2→ C2 H4
nC2H4 + H2→ (-CH2 - CH2-)n
Then the amount of polyethene obtained from 64 kg of calcium carbide is
CaC2→ C2H2→C2H4→polyethene
64 26 28 n x 28
64 kg 26 kg 28 kg 28 kg
Thus as per balanced equation, amount of
polyethene obtained form 64 kg of clcium carbide
is 28 kg.
K2[Hgl4] detects the ion/group.
Nesseler’s reagent K2[HgI4] is used for detection
of ammonium ion. with ammonia it gives a reddish
brown ppt or colouration.
Which one of the following can give iodometric titration?
Cu2+ + 2I-→Cu + I2
O2 is
Molecular orbital energy level diagram for O2
shows two unpaired electrons in antibonding pimolecular
orbitals so it is paramagnetic.
Two solutions having pH 1 and 2, are mixed. Then the resulting pH will be
forpH =1, [H+] = 10-1; for pH =2, [H+] = 10-2
Total [H+] = 0.1 + 0.01 = 0.11
pH =-log (0.11) = 0.9586
If 1, 3-dibromopropane reacts with Zn, the product obtained is
Dehalogenation of 1,3-dibromopropane with Zn.gives cyclopropane.
Hydrolysis of methyl cyanide yields :
Hydrolysis of CH3CN gives acetic acid and
ammonia.
CH3CN Hydrolysis → CH3COOH + NH3
The number of stereosiomers of the compounds
CH3CHBrCHBrCOOH and CH3CHBrCHBrCH3
respectively are:
Total number of stereo-isomers of
CH3CHBrCHBrCOOH is 4 and for.CH3CHBrCHBrCH3is 3.
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