List of top Chemistry Questions

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 order of dipole moments of H\textsubscript{2}O (A), CHCl\textsubscript{3} (B) and NH\textsubscript{3} (C) is
Identify the correct graph for an ideal gas
(\(y\)-axis = compressibility factor \(Z\); \(x\)-axis = pressure \(p\))
Which of the following sets are correctly matched?
MoleculeHybridizationGeometry
I. BrF5sp3d2square pyramidal
II. XeF6sp3d3Distorted octahedral
III. SF4dsp2square planar
IV. PbCl2splinear
Observe the following data.
IonQ4+Xb+Yc+Zd+
Radius (pm)536640100

Q4+, Xb+, Yc+, Zd+ 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?
The structures of succinic acid (X) and malonic acid (Y), respectively, are:
What are the major products X and Y respectively in the following set of reactions?
Fe (dark)
Which of the following represents nucleoside of RNA?
Which of the following will undergo methylation with CH₃Cl / anhyd. AlCl₃?
Match the following:
List-I (Compound)List-II (pKa)
A) p-NitrophenolI) 15.9
B) PhenolII) 7.1
C) EthanolIII) 10.0
D) p-CresolIV) 10.2
What are X and Y respectively in the following set of reactions?
cresol
Which of the following is not an antibiotic?
Which of the following methods is useful for producing semiconductor grade metals of high purity?
Identify the essential amino acids from the following:
A) Leucine
B) Tyrosine
C) Cysteine
D) Histidine
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 ion (hydrated in solution) which is not correctly matched with its spin only magnetic moment (in BM) given in brackets:
Which one of the statements regarding X is not correct?
3-Hydroxybutanoic acid → 3-Hydroxypentanoic acid → X X is:
What is the approximate molality of 10% (w/w) aqueous glucose solution? (Molar mass of glucose = 180 g mol\(^{-1}\))
The van't Hoff factor for 0.5 m aqueous CH₃COOH solution is 1.075. What is the experimentally observed \(\Delta T_f\) (in K) for this solution? \( K_f = 1.86 \, \text{K kg mol}^{-1} \)
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
Match the following
List-I (Symbol of electrical property)List-II (Units)
A) \( \Omega \)I) S cm\(^{-1}\)
B) GII) m\(^{-1}\)
C) \( \kappa \)III) S cm\(^2\) mol\(^{-1}\)
D) G\(^*\)IV) S
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