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WB JEE 2016

WB JEE / 155 questions

2026Tue, May 17, 2016 11:00 AM155 PYQs
1Alcohol And Ether
Which of the following compounds would not react with Lucas reagent at room temperature.
MCQ+1 / -0.252016
2Alcohol And Ether
Which of the following will be dehydrated most readily in alkaline medium?
MCQ+1 / -0.252016
3Aldehyde And Ketone
Amongst the following compounds, the one that will not respond to Cannizzaro reaction upon treatment with alkali is
MCQ+1 / -0.252016
4Aldehyde And Ketone
Amongst the following compounds, the one which would not respond to iodoform test is :
MCQ+1 / -0.252016
5Atomic Structure
The energy required to break one mole of hydrogen-hydrogen bonds in H2 is 436 kJ. What is the longest wavelength of light required to break a single hydrogen-hydrogen bond?
MCQ+1 / -0.252016
6Atomic Structure
The time taken for an electron to complete one revolution in Bohr orbit of hydrogen atom is
MCQ+2 / -0.52016
7Chemical Bonding
The boiling points of HF, HCl, HBr and HI follow the order
MCQ+1 / -0.252016
8Chemical Bonding
The correct order of O\(-\)O bond length in O2, H2O2 and O3 is
MCQ+1 / -0.252016
9Chemical Bonding
The number of \(\sigma\) and \(\pi\) bonds between two carbon atoms in calcium carbide are
MCQ+1 / -0.252016
10Chemical Bonding
Of the following molecules, which have shape similar to CO2 ?
MCQM+2 / -02016
11Chemistry In Everyday Life
The correct structure of the drug paracetamol is
MCQ+1 / -0.252016
12D And F Block Elements
Which of the following statements regarding Lanthanides is false?
MCQ+1 / -0.252016
13Electrochemistry
The order of equivalent conductance at infinite dilution for LiCl, NaCl and KCl is
MCQ+1 / -0.252016
14Gaseous State
Amongst the following, which should have the highest rms speed at the same temperature?
MCQ+2 / -0.52016
15General Organic Chemistry
The correct order of basicity of the following compounds is
MCQ+1 / -0.252016
16General Organic Chemistry
From the following compounds, choose the one which is not aromatic.
MCQ+1 / -0.252016
17Halogen Derivatives
Amongst the following compounds, the one(s) which readily react with ethanolic KCN.
MCQM+2 / -02016
18Hydrocarbons
Which of the following reactions will not result in the formation of carbon-carbon bonds?
MCQ+1 / -0.252016
19Hydrocarbons
Ozonolysis of an alkene produces only one dicarbonyl compound. The structure of the alkene is
MCQ+1 / -0.252016
20Hydrocarbons
Identify X in the following sequence of reactions.
MCQ+2 / -0.52016
21Hydrocarbons
The major products obtained during ozonolysis of 2, 3-dimethyl-1-butene and subsequent reductions with Zn and H2O are
MCQ+2 / -0.52016
22Hydrogen And Its Compounds
Which statement is not correct for ortho and para hydrogen?
MCQ+1 / -0.252016
23Ionic Equilibrum
The molar solubility (in mol L\(-\)1) of a sparingly soluble salt MX4 is 'S'. The corresponding solubility product is Ksp. S in terms of 'Ksp' is given by the relation
MCQ+1 / -0.252016
24Ionic Equilibrum
In which of the following mixed aqueous solutions, pH = pKa at equilibrium?1. 100 mL of 0.1 M CH3COOH + 100 mL of 0.1 MCH3COONa(2) 100 mL of 0.1 MCH3COOH + 50 mL of 0.1 M NaOH(3) 100 mL of 0.1 M CH3COOH + 100 mL of 0.1 M NaOH(4) 100 mL of 0...
MCQM+2 / -02016
25Isomerism
Choose the correct statement(s) among the following.
MCQM+2 / -02016
26Liquid Solution
If p\(^\circ\) and p are the vapour pressure of the pure solvent and solution and n1 and n2 are the moles of solute and solvent respectively in the solution then the correct relation between p and p\(^\circ\) is
MCQ+1 / -0.252016
27Metallurgy
The metal which can be used to obtain metallic Cu from aqueous CuSO4 solution is
MCQ+1 / -0.252016
28Periodic Table
Which of the following arrangements is correct in respect of solubility in water?
MCQ+1 / -0.252016
29Periodic Table
An element X belongs to fourth period and fifteenth group of the periodic table. Which of the following statements is true?
MCQ+1 / -0.252016
30Practical Chemistry
Compound X is tested and the results are shown in the table.
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MCQ+2 / -0.52016
31Radioactivity And Nuclear Chemistry
If radium and chlorine combine to form radium chloride, the compound would be
MCQ+1 / -0.252016
32Radioactivity And Nuclear Chemistry
An element E loses one \(\alpha\) and two \(\beta\)-particles in three successive stages. The resulting element will be
MCQ+1 / -0.252016
33Solid State
Ionic solids with Schottky defect may contain in their structure
MCQ+1 / -0.252016
34Some P Block Elements
Nitrogen dioxide is not produced on heating
MCQ+1 / -0.252016
35Some P Block Elements
In the solid state, PCl5 exists as
MCQ+1 / -0.252016
36Some P Block Elements
The acid in which O\(-\)O bonding is present is
MCQ+1 / -0.252016
37Some P Block Elements
Which of the following statement(s) is (are) correct when a mixture of NaCl and K2Cr2O7 is gently warmed with conc. H2SO4?
MCQM+2 / -02016
38Surface Chemistry
Point out the false statement.
MCQ+1 / -0.252016
39Thermodynamics
Which of the following plots represent an exothermic reaction?
MCQ+1 / -0.252016
40Thermodynamics
The condition for a reaction to occur spontaneously is
MCQ+1 / -0.252016
41Application Of Derivatives
Time period T of a simple pendulum of length l is given by \(T = 2\pi \sqrt {{l \over g}}\). If the length is increased by 2%, then an approximate change in the time period is
MCQ+1 / -0.252016
42Application Of Derivatives
If f(x) is a function such that f'(x) = (x \(-\) 1)2(4 \(-\) x), then
MCQM+2 / -02016
43Circle
The locus of the mid-points of chords of the circle x2 + y2 = 1, which subtends a right angle at the origin, is
MCQ+2 / -0.52016
44Circle
The equation of a line parallel to the line 3x + 4y = 0 and touching the circle x2 + y2 = 9 in the first quadrant, is
MCQ+1 / -0.252016
45Complex Numbers
The value of \(\sum\limits_{n = 1}^{13} {({i^n} + {i^{n + 1}})}\), \(i = \sqrt { - 1}\) is
MCQ+1 / -0.252016
46Complex Numbers
If z = sin\(\theta\) \(-\) icos\(\theta\), then for any integer n,
MCQM+2 / -02016
47Complex Numbers
If \(\omega\) is an imaginary cube root of unity, then the value of (2 \(-\) \(\omega\)) (2 \(-\) \(\omega\)2) + 2(3 \(-\) \(\omega\))(3 \(-\) \(\omega\)2) + ... + (n \(-\) 1) (n \(-\) \(\omega\))(n \(-\) \(\omega\)2) is
MCQ+2 / -0.52016
48Definite Integration
If [x] denotes the greatest integer less than or equal to x, then the value of the integral \(\int\limits_0^2 {{x^2}[x]\,dx}\) equals
MCQ+2 / -0.52016
49Definite Integration
\(\int\limits_0^1 {\log \left( {{1 \over x} - 1} \right)} dx\) is equal to
MCQ+1 / -0.252016
50Definite Integration
If \(\phi (t) = \left\{ \matrix{ 1,\,for\,0 \le t < 1, \hfill \cr 0,\,otherwise \hfill \cr} \right.\), then \(\int\limits_{ - 300}^{3000} {\left( {\sum\limits_{r' = 2014}^{2016} {\phi (t - r')\phi (t - 2016)} } \right)} \,dt\) is
MCQM+2 / -02016

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