WBJEE Chemistry Test - 8


40 Questions MCQ Test WBJEE Sample Papers, Section Wise & Full Mock Tests | WBJEE Chemistry Test - 8


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Attempt WBJEE Chemistry Test - 8 | 40 questions in 60 minutes | Mock test for JEE preparation | Free important questions MCQ to study WBJEE Sample Papers, Section Wise & Full Mock Tests for JEE Exam | Download free PDF with solutions
QUESTION: 1

Identity the Bronsted acid in the following equation : PO₄3⁻(aq) + H₂O(1) → HPO₄2⁻(aq) + OH⁻(aq)

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QUESTION: 2

The compound 'A' when treated with methyl alcohol and few drops of H₂SO₄ give wintergreen smell. The compound 'A' is

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QUESTION: 3

Which of the following does not turn Schiff's reagent to pink ?

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QUESTION: 4

Which among the following has most efficient overlap?

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QUESTION: 5

By passing H₂S gas in acidified KMnO₄, we get

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QUESTION: 6

A chloride dissolves appreciably in cold water. When placed on platinum wire in bunsen flame, no distinctive colour is noticed, the cation would be

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QUESTION: 7
The energy of a hydrogen atom in its ground state is -13.6eV. The energy of the level corresponding to the energy level equal to 5 is
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QUESTION: 8
Electrophiles are
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QUESTION: 9
α - D (+)-glucose and β - D (+)-glucose are
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QUESTION: 10
Consider the following reaction occuring in a automobile engine
2C₈H₁₈(g) + 250₂(g) → 16CO₂ + 18H₂O(g)
the signs of ∆H,∆S and ∆G for above reaction would be
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QUESTION: 11
Which of the following factors will favour the reverse reaction in a chemical equilibrium?
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QUESTION: 12
The reaction A → B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 hour. What is the time taken for conversion of 0.9 mole of A to produce 0.675 moles of B?
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QUESTION: 13
Arsenic drugs are mainly used in the treatment of
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QUESTION: 14
IUPAC name of CH₂=CH-CN is
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QUESTION: 15

The dark blue colour of the solution formed when excess of ammonia is added to a solution of copper (II) sulphate is due to the presence of the ion :

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QUESTION: 16

Calculate enthalpy of formation of ethylene from the following data:

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QUESTION: 17
Sodium conducts electricity because
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QUESTION: 18
A gas is said to behave like an ideal gas when the relation PV/T = consatnt. When do you expect a real gas to behave like an ideal gas ?
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QUESTION: 19
What happened when boron trichloride reacts with hydrogen at the temperature of 1270K?
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QUESTION: 20
A pseudo solid is
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QUESTION: 21
The structure of white phosphorus is
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QUESTION: 22
When two ice cubes are pressed over each other, they unite to form one cube. Which of the following forces is responsible to hold them together?
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QUESTION: 23
Which of the following compound is optically inactive?
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QUESTION: 24
A cyclotron can not accelerate
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QUESTION: 25
Glyptal polymer is obtained from glycerol on reacting with
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QUESTION: 26

In which reaction there is change in O.N. of N atom

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QUESTION: 27
Which of the following is strongest Bronsted acid?
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QUESTION: 28

Potassium has a bcc structure with nearest neighbour distance 4.52 Å. Its atomic weight is 39. Its density will be

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QUESTION: 29
Which of the following is used in asbestos?
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QUESTION: 30
Consider the following statements about enantiomers :
1. Isomers which are mirror images of each other are called enantiomers
2. A mixture of equal parts of enantiomers is called a racemic modification
3. Enantiomers show different properties-physical or chemical -only in a chiral medium
4. A racemic modification is converted by an optically active agent into mixture of diasteromers that can be separated.
Which of the above statements are correct ?
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QUESTION: 31

The alkene that exhibits geometrical isomerism is

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QUESTION: 32

Among the following, the coloured compound is

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QUESTION: 33

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): According to VSEPR theory, there shall be minimum repulsions among lone pairs and bond pairs present in a molecule or ion.
Reason(R): I3− , has a linear structure.

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QUESTION: 34

The compound which reacts with HBr obeying Markownikeff's rule is

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QUESTION: 35

Which of the following applies to the reaction,

1. CH₃CH = CHCH₃(major product)
2. CH₂ = CH − CH₂CH₃(minor product)

Solution:
*Multiple options can be correct
QUESTION: 36

Among the following compounds, which will react with acetone to give a product containing > C=N- ?

Solution:
*Multiple options can be correct
QUESTION: 37

Aniline is reacted with Br2 ∕ OH and the resulting product is treated with aqueous solution of NaNO2 in presence of dil.HCl. The compound so formed is converted into tetrafluoroborate which is subsequently heated and dried. The products formed during the reaction are

Solution:
*Multiple options can be correct
QUESTION: 38

Which compounds react with PCl5 ?

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QUESTION: 39

Consider a chemical reaction,
2A + B → A2B . The reactant A will decrease at

Solution:
*Multiple options can be correct
QUESTION: 40

The nuclear reactions accompanied with emission of neutron (s) are:

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