List of top Chemistry Questions

The critical micelle concentration (CMC) of a soap solution is \( 5 \times 10^{-4} \, \text{mol L}^{-1} \). Identify the correct statements about this solution.
[I.] The micelle is stable if the soap solution concentration is \( 10^{-7} \, \text{mol L}^{-1} \)
[II.] The micelle is stable if the soap solution concentration is higher than \( 5 \times 10^{-4} \, \text{mol L}^{-1} \)
[III.] Micelles are also known as associated colloids.

Match the following:
List-I (Reaction)

A) Hydrogenation of vegetable oils
B) Decomposition of potassium chlorate
C) Oxidation of SO₂ in lead chamber process
D) Oxidation of ammonia in Ostwald’s process

List-II (Catalyst)

I) Ni
II) MnO₂
III) Pt
IV) NO(g)

Complete hydrolysis of Xenon hexafluoride gives HF along with compound X. The hybridisation in X is

KMnO\(_4\) oxidises hydrogen sulphide in acidic medium. The number of moles of KMnO\(_4\) which react with one mole of hydrogen sulphide is

For a reaction, the graph of \( \ln k \) (on y-axis) and \( 1/T \) (on x-axis) is a straight line with a slope \( -2 \times 10^4 \text{ K} \). The activation energy of the reaction (in kJ mol\(^{-1}\)) is \((R = 8.3~\text{J K}^{-1} \text{mol}^{-1})\)

A solution is prepared by adding 124 g of ethylene glycol (molar mass = 62 g mol\(^{-1}\)) to \( x \) g of water to get a 10 m solution. What is the value of \( x \) (in g)?

Consider the sets I, II and III. Identify the set(s) which is (are) correctly matched.
[I.] Staggered ethane>eclipsed ethane \dotfill torsional strain
[II.] 2,2-Dimethylbutane>2-methylpentane \dotfill boiling point
[III.] cis-But-2-ene>trans-But-2-ene \dotfill dipole moment

Which of the following statements is not correct?

At T(K), \(K_{\text{sp}}\) of two ionic salts MX\(_2\) and MX is \(5 \times 10^{-13}\) and \(1.6 \times 10^{-11}\) respectively. The ratio of molar solubility of MX\(_2\) and MX is

Select the correct statements from the following
A)
Aluminium liberates \( \mathrm{H_2} \) gas with dil.\( \mathrm{HCl} \) but not with aqueous \( \mathrm{NaOH} \).
B)
Formula of sodium metaborate is \( \mathrm{Na_3BO_3} \)
C)
Boric acid is a weak monobasic acid
D)
For thallium, +1 state is more stable than +3 state.

The number of amphoteric oxides from the following is
\(\mathrm{CO_2, GeO_2, SnO_2, PbO_2, CO, GeO, SnO, PbO}\)

Identify the correct statements about the following stoichiometric equation. \[ aP_4 + bOH^- + CH_2O \rightarrow dPH_3 + eH_2PO_2^- \]
[I.] \(a + b + c = 5\)
[II.] \(b + c - e = 3\)
[III.] The oxidation state of P in \(H_2PO_2^-\) is \(+1\)

Consider the following equilibrium reaction in gaseous state at T(K): \[ A + 2B \rightleftharpoons 2C + D \] The initial concentration of B is 1.5 times that of A. At equilibrium, the concentrations of A and B are equal. The equilibrium constant for the reaction is:

5 moles of a gas is allowed to pass through a series of changes as shown in the graph, in a cyclic process.
The processes \(C \rightarrow A\), \(B \rightarrow C\), and \(A \rightarrow B\) respectively are: \[ \text{(Volume = vertical axis, Temperature = horizontal axis)} \]

5 moles of a gas is allowed to pass through a series of changes as shown in the grap

The order of dipole moments of H\textsubscript{2}O (A), CHCl\textsubscript{3} (B) and NH\textsubscript{3} (C) is

Identify the correct statements from the following.
[I.] Glass is an extremely viscous liquid.
[II.] Increase in temperature decreases the surface tension of liquids.
[III.] Compressibility factor for an ideal gas is zero.

Identify the correct graph for an ideal gas
(\(y\)-axis = compressibility factor \(Z\); \(x\)-axis = pressure \(p\))

Observe the following data.

Ion	Q⁴⁺	X^b+	Y^c+	Z^d+
Radius (pm)	53	66	40	100

Q⁴⁺, X^b+, Y^c+, Z^d+ are respectively

The energy of second Bohr orbit of hydrogen atom is \(-3.4 \, \text{eV}\). The energy of the fourth Bohr orbit of the He\(^+\) ion will be

Which of the following sets are correctly matched?

Molecule	Hybridization	Geometry
I. BrF₅	sp³d²	square pyramidal
II. XeF₆	sp³d³	Distorted octahedral
III. SF₄	dsp²	square planar
IV. PbCl₂	sp	linear

Benzyl amine can be prepared from which of the following reactions?

Which of the following is not an antibiotic?

Which of the following represents nucleoside of RNA?

Identify the essential amino acids from the following:
A) Leucine
B) Tyrosine
C) Cysteine
D) Histidine

Which one of the statements regarding X is not correct?
3-Hydroxybutanoic acid → 3-Hydroxypentanoic acid → X X is: