List of top Chemistry Questions

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

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

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:

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 \(+1\)

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.

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

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

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 represents nucleoside of RNA?

Which of the following is not an antibiotic?

Which of the following methods is useful for producing semiconductor grade metals of high purity?

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

Identify the ion (hydrated in solution) which is not correctly matched with its spin only magnetic moment (in BM) given in brackets:

The IUPAC name of the complex shown below is:
K₃[Co(COₓ)₃]

Observe the following (Products = .........):
P₄ + SOCl₂ → Products
P₄ + SO₂Cl₂ → Products
In both the reactions, a common product 'X' is obtained. The number of lone pair of electrons on the central atom of 'X' is:

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

Match the following:

List-I (Sol)	List-II (Method of preparation)
A) \( \text{As}_2\text{S}_3 \)	I) Bredig's arc method
B) \( \text{Au} \)	II) Oxidation
C) \( \text{S} \)	III) Hydrolysis
D) \( \text{Fe(OH)}_3 \)	IV) Double decomposition

The following graph is obtained for a first-order reaction (A → P). The activation energy (E\(_a\) in kJ/mol\(^{-1}\)) and heat of reaction (ΔH in kJ/mol\(^{-1}\)) for this reaction are respectively

first-order reaction

Match the following

List-I (Symbol of electrical property)	List-II (Units)
A) \( \Omega \)	I) S cm\(^{-1}\)
B) G	II) m\(^{-1}\)
C) \( \kappa \)	III) S cm\(^2\) mol\(^{-1}\)
D) G\(^*\)	IV) S

The incorrect statement from the following is

Identify the correct statements from the following:
A) Among alkali metal ions, Li⁺ has the highest hydration enthalpy.
B) Boiling point of alkali metals increases from Li to Cs.
C) Density of K is less than that of Na and Rb.
D) Li has strong tendency to form superoxide.