List of top Chemistry Questions

Match the following:
 


The correct answer is:
 

0.1 mole of H\(_3\)PO\(_3\) is present in 500 mL of solution. The normality of it is:
In the extraction of iron, the reaction which occurs at 900-1500 K in blast furnace is
At 300 K, the vapour pressure of toluene and benzene are 3.63 kPa and 9.7 kPa, respectively. What is the composition of vapour in equilibrium with the solution containing 0.4 mole fraction of toluene?

The correct order of boiling points of hydrogen halides is: 

Identify the correct answer
During the preparation of Mohr’s salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of Fe2+ ion?
The products A and B obtained in the following reactions, respectively, are
3ROH+PCI3→3RCI+A 
ROH+PCI5→RCI+HCI+B
Given below are two statements :
Statement I : [Co(NH3)6] 3+ is a homoleptic complex whereas [Co(NH3)4Cl2] + is a heteroleptic complex. 
Statement II : Complex [Co(NH3)6] 3+ has only one kind of ligands but [Co(NH3)4Cl2] + has more than one kind of ligands. 
In the light of the above statements, choose the correct answer from the options given below
The pair of Lanthanoid ions which are diamagnetic is
On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as
Given below are two statements:
Statement I: Both [Co(NH3)6]3+ and [CoF6]3- complexes are octahedral but differ in their magnetic behaviour.
Statement II: [Co(NH3)6]3+ is diamagnetic whereas [CoF6]3- is paramagnetic.
In the light of the above statements, choose the correct answer from the options given below:
Match List I with List II

List-I
(Process)

List-II 
(Conditions)

(A)Isothermal process(I)No heat exchange
(B)Isochoric process(II)Carried out at constant temperature
(C)Isobaric process(III)Carried out at constant volume
(D)Adiabatic process(IV)Carried out at constant pressure

Choose the correct answer from the options given below:
Fehling’s solution ‘A’ is
A compound with a molecular formula of C6H14 has two tertiary carbons. Its IUPAC name is:
In which of the following equilibria, Kp and Ke are NOT equal?
Identify the correct reagents that would bring about the following transformation.
correct reagents that would bring about the following transformation. correct reagents that would bring about the following transformation.
Among Group 16 elements, which one does NOT show -2 oxidation state?
Match List I with List II

List-I
(Quantum Number)

List-II 
(Information provided)

(A)mI(I)Shape of orbital
(B)ms(II)Size of orbital
(C)I(III)Orientation of orbital
(D)n(IV)Orientation of spin of electron

Choose the correct answer from the options given below:
Which reaction is NOT a redox reaction?
In which of the following processes entropy increases?
A. A liquid evaporates to vapour.
B. Temperature of a crystalline solid lowered from 130 K to 0 K.
C. 2NaHCO3(s) → Na2CO3(s)+CO2(g)+H2O(g)
D. Cl2(g) → 2Cl(g)
Choose the correct answer from the options given below:
Which plot of ln k vs \(\frac{1}{T}\) is consistent with Arrhenius equation?
Match List I with List II

List-I
(Compound)

List-II
(Shape/geometry)

(A)NH3(I)Trigonal Pyramidal
(B)BrF5(II)Square Planar
(C)XeF4(III)Octahedral
(D)SF6(IV)Square Pyramidal

Choose the correct answer from the options given below:
Match List I with List II

List-I
(Conversion)

List-II 
(Shape/geometry)

(A)1 mol of H2O to O2(I)3F
(B)1 mol of MnO-4 to Mn2+(II)2F
(C)1.5 mol of Ca from molten CaCl2(III)1F
(D)1 mol of FeO to Fe2O3(IV)5F

Choose the correct answer from the options given below:
Given below are two statements:
Statement I: Aniline does not undergo Friedel-Crafts alkylation reaction.
Statement II: Aniline cannot be prepared through Gabriel synthesis.
In the light of the above statements, choose the correct answer from the options given below