List of top Chemistry Questions

Which of the following represents the correct structure of \( \beta\text{-}D\text{-}(-)\text{-} \) Fructofuranose?

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)

Identify the set which does not have ambidentate ligand(s).

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

The number of linear and crosslinked polymers in the following respectively are:
Novolac, Nylon 6,6, Bakelite, PVC, melamine

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.

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

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

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

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

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 \(+1\)

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.

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

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

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:

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

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.

Identify the correct statements from the following:
I) CO reduces the oxygen carrying ability of blood.
II) Producer gas contains CO and N₂.
III) C-O bond length in CO₂ is 115 pm.

The mass of a mixture containing NaCl and NaBr is 4.0 g. If Na is 20% of the total mixture, the composition of NaCl in the mixture is

Which of the following sets are correctly matched?

Molecule	Number of lone pairs of electrons on central atom	Hybridization
I) \( \text{PCF}_3 \)	1	\( \text{sp}^3 \)
II) \( \text{SO}_2 \)	2	\( \text{sp}^2 \)
III) \( \text{SF}_4 \)	2	\( \text{sp}^3d^2 \)
IV) \( \text{CF}_4 \)	2	\( \text{sp}^3 \)

The sequence of reagents required to convert aniline to benzoic acid is:

Match the following polymers with their applications:

List-I (Polymer)	List-II (Used in making)
Polymer 1	Application 1
Polymer 2	Application 2
Polymer 3	Application 3
Polymer 4	Application 4