WBJEE Chemistry Test - 11
40 Questions MCQ Test WBJEE Sample Papers, Section Wise & Full Mock Tests | WBJEE Chemistry Test - 11
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Which one of the following species is capable of functioning both as Bronsted acid and Bronsted base ?
A Bronsted-Lowry acid is any species that is capable of donating a proton - H+
A Br insted-Lowry base is any species that is capable of accepting a proton, which requires a lone pair of electrons to bond to the H+
Water is amphoteric, which means it can act as both a Bronsted-Lowry acid and a Bronsted-Lowry base.
Strong acids and bases ionize completely in aqueous solution, while weak acids and bases ionize only partially.
The conjugate base of a Bronsted-Lowry acid is the species formed after an acid donates a proton. The conjugate acid of a Bronsted-Lowry base is the species formed after a base accepts a proton.
The two species in a conjugate acid-base pair have the same molecular formula except the acid has an extra H+ compared to the conjugate base.
Phenol can be distinguished from ethyl alcohol by all reagents except
The four bonds in methane are directed in space at an angle of
Given that
C(s) + O₂(g) → CO₂(g); ∆H = - 395 KJ
S(s) + O₂(g) → SO₂(g); ∆H = -295 KJ
CS₂(l) + 3O₂(g) → CO₂(g) + 2SO₂(g); ∆H + -1110 KJ
The heat of formation of CS₂ is
The percentage of s-character in the hybrid orbitals sp, sp2 and sp3 follows the pattern
A Carnot engine, working between 500 K to 300 K has a work output of 800 J-cycle-1. What is the amount of heat energy supplied to the engine from the source per cycle?
Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour?
How many Cl- ions are there around Na⁺ ion in NaCl crystal?
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 ?
Standard entropy of X₂,Y₂ and XY₃ are 60,40 and 50 JK-1 mol-1, respectively . For the reaction ,
, to be equilibrium, the temperature will be
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): The carbon-halogen bond in an aryl halide is shorter than the carbon-halogen bond in an alkyl halide.
Reason(R): A bond formed of an sp3 orbital should be shorter than the corresponding bond involving an sp2 orbital.
Which one of the following conditions will increase the voltage of the cell represented by the following equation?
Zn(s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s)
The sum of the number of neutrons and proton in the isotope of hydrogen is :
Which of the following will undergo aldol condensation ?
Which of the following compounds will react with ethanolic KCN ?
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