List of top Chemistry Questions

One of the reactions A, B, C, D given below yields a product which will not answer Hinsberg's test when reacted with Benzene sulphonyl chloride. Identify the reaction.

Identify the final product formed when Toluene undergoes a series of reactions with reagents given in the order: 
(i) \( \text{Cl}_2 / \text{Sunlight} \)
(ii) \( \text{H}_2\text{O}/373 \, \text{K} \)
(iii) Acetophenone / \( \text{OH}^- \) at 293 K

4 statements are given below. Identify the incorrect statement:

(A) Phenol has lower \( pK_a \) value than \( \text{p} \)-cresol.
(B) 2-Chlorophenol is more acidic than phenol.
(C) Ortho and para nitrophenols can be separated by steam distillation since \( \text{p} \)-Nitrophenol is more steam volatile than \( o \)-Nitrophenol.
(D) Phenol on reaction with \( \text{Cr}_2\text{O}_7^{2-} / \text{H}^+ \) yields a conjugated diketone.

Study the graph between partial pressure and mole fraction of some gases and arrange the gases P, Q, R, and S dissolved in H2O, in the decreasing order of their KH values.

A Hydrocarbon $ [A] $ (molecular formula $ C_3H_6 $) on reaction with $ \text{Br}_2/\text{CCl}_4 $ gave $ [B] $. When $ [B] $ is heated with 2 moles of alcoholic KOH, it gave compound $ [C] $. 3 moles of Compound $ [C] $ when passed through red hot Iron tube forms $ [D] $. Identify $ [D] $.
A compound having molecular formula $ C_4H_{11}N $, reacts with $ \text{CHCl}_3 $ in alcoholic KOH, on heating, to form a compound with a foul smell. Identify the optically active isomer of the compound which also shows the above reaction.
With reference to Pauling's Electronegativity scale, which one of the following options shows the correct order of electronegativity values of elements?
Which of the following two molecular species are Diamagnetic in nature?

Match the names of reactions given in Column I with the appropriate reactions given in Column II

Based on Valence Bond Theory, match the complexes listed in Column I with the number of unpaired electrons on the central metal ion, given in Column II.

What is the wave number (Units cm$^{-1}$) of the longest wavelength transition in the Balmer series of the Hydrogen spectrum? $ Z = 1 $ for $ H $
Given that the freezing point of benzene is $ 5.48^\circ C $ and its $ K_f $ value is $ 5.12^\circ C/m $, what would be the freezing point of a solution of 20 g of propane in 400 g of benzene?
Two statements, Assertion and Reason are given. Choose the correct option from the following.
Assertion: In the secondary structure of RNA, double helix structure is formed.
Reason: In the double structure of RNA, two nucleic acid chains are wound about each other and held together by hydrogen bonds between pairs of bases.
Identify the correct statement regarding corrosion of iron rod left exposed to atmosphere.

Identify the final product formed when Benzamide undergoes the following reactions:

For a given reaction, $ X(g) + Y(g) \to Z(g) $, the order of reaction with respect to $ X $ and $ Y $ are $ m $ and $ n $ respectively. If the concentration of $ X $ is tripled and that of $ Y $ is decreased to one third, what is the ratio between the new rate to the original rate of the reaction?

Identify the end-product $ [D] $ formed when solution salicylate undergoes the following series of reactions.

At 700 K, the Equilibrium constant value for the formation of HI from $ H_2 $ and $ I_2 $ is 49.0. 0.7 mole of HI(g) is present at equilibrium. What will be the concentrations of $ H_2 $ and $ I_2 $ gases if we initially started with HI(g) and allowed the reaction to reach equilibrium at the same temperature?
Given are 4 statements related to the chemical properties of Glucose. Identify the two incorrect statements from the following.
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
In which of the following equilibria, Kp and Ke are NOT equal?
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:
Among Group 16 elements, which one does NOT show -2 oxidation state?
Which reaction is NOT a redox reaction?
A compound with a molecular formula of C6H14 has two tertiary carbons. Its IUPAC name is: