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.
In Nessler's reagent, the ion present is
The four bonds in methane are directed in space at an angle of
The percentage of s-character in the hybrid orbitals sp, sp2 and sp3 follows the pattern
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
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?
β- particles are
How many Cl- ions are there around Na⁺ ion in NaCl crystal?
Aniline reacts with KOH and phosgene to form
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 above reaction X is
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.
Toluic acid on reaction with Br₂ + Fe gives
Boron readily dissolves in
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 ?