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WBJEE Chemistry Test - 12 - JEE MCQ
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30 Questions MCQ Test WBJEE Sample Papers, Section Wise & Full Mock Tests 2025 - WBJEE Chemistry Test - 12
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WBJEE Chemistry Test - 12 - 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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WBJEE Chemistry Test - 12 - Question 5
The phenomenon in which white transparent crystal changes into white powder is called
WBJEE Chemistry Test - 12 - Question 6
Which of the following is soluble in yellow ammonium sulphide?
WBJEE Chemistry Test - 12 - Question 7
What is the wave number of 4th line in Balmer series of Hydrogen spectrum? (R = 1,09,677cm-1)
WBJEE Chemistry Test - 12 - Question 8
Which of the following does not have sp2-hybridised carbon?
WBJEE Chemistry Test - 12 - Question 9
Which pair of elements among the following will form most stable ionic bond
WBJEE Chemistry Test - 12 - Question 11
A vessel at equilibrium, contains SO₃, SO₂ and O₂. Now some helium gas is added, so that total pressure increases while temperature and volume remain constant. According to Le-Chatelier's principle, the dissociation of SO₃
WBJEE Chemistry Test - 12 - Question 12
A first order reaction is 10% complete in 20 min. The time taken for 19% completion is
WBJEE Chemistry Test - 12 - Question 16
The chemical formula of Iron (III) hexacyanoferrate (II) is
WBJEE Chemistry Test - 12 - Question 18
0.24 g of a volatile gas upon vapourisation gives 45 ml vapour of N.T.P. what will be vapour density of the substance ? (Density of H₂ = 0.089 gl-1)
WBJEE Chemistry Test - 12 - Question 19
When bauxite powder is mixed with coke and reacted with nitrogen at 2075K, carbon compound and X are formed. What is the gas formed when X is reacted with water
WBJEE Chemistry Test - 12 - Question 20
Which one of the following is correct about stability of the given ions?
WBJEE Chemistry Test - 12 - Question 21
Which of the following substances is used as fertilizer ?
WBJEE Chemistry Test - 12 - Question 24
The half-life of a radioactive isotope is 2.3 hours. Its disintegration constant will be
WBJEE Chemistry Test - 12 - Question 25
Aniline in a set of reactions yielded a product D
The structure of D is
The structure of D is
WBJEE Chemistry Test - 12 - Question 28
In which of the following reaction there is no change in oxidation number
WBJEE Chemistry Test - 12 - Question 29
The second order Bragg diffraction of X-rays with λ = 1.00 Å from a set of parallel planes in a metal occurs at an angle of 600. The distance between the scattering planes in the crystal is
WBJEE Chemistry Test - 12 - Question 30
Consider the following statements about chirality :
1. Molecules which are not superimposable on their mirror images are achiral
2. A chiral molecule can have simple axis of symmetry
3. A carbon atom of which four different groups are attached is a chiral centre
4. A compound whose molecules are achiral exhibits optical activity
Which of the statements given above are correct ?
1. Molecules which are not superimposable on their mirror images are achiral
2. A chiral molecule can have simple axis of symmetry
3. A carbon atom of which four different groups are attached is a chiral centre
4. A compound whose molecules are achiral exhibits optical activity
Which of the statements given above are correct ?
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