List of top Chemistry Questions

The order of dipole moments of H\textsubscript{2}O (A), CHCl\textsubscript{3} (B) and NH\textsubscript{3} (C) is
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.
IonQ4+Xb+Yc+Zd+
Radius (pm)536640100

Q4+, Xb+, Yc+, Zd+ are respectively

Which of the following sets are correctly matched?
MoleculeHybridizationGeometry
I. BrF5sp3d2square pyramidal
II. XeF6sp3d3Distorted octahedral
III. SF4dsp2square planar
IV. PbCl2splinear
Benzyl amine can be prepared from which of the following reactions?
Which of the following will undergo methylation with CH₃Cl / anhyd. AlCl₃?
Which of the following is not an antibiotic?
What are X and Y respectively in the following set of reactions?
cresol
What are the major products X and Y respectively in the following set of reactions?
Fe (dark)
The structures of succinic acid (X) and malonic acid (Y), respectively, are:
Which of the following represents nucleoside of RNA?
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
Which of the following enzymatic reaction is not correctly matched with enzyme shown against it in brackets?
Identify the ion (hydrated in solution) which is not correctly matched with its spin only magnetic moment (in BM) given in brackets:
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:
The IUPAC name of the complex shown below is:
K₃[Co(COₓ)₃]
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
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
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 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? \( K_f = 1.86 \, \text{K kg mol}^{-1} \)
What is the approximate molality of 10% (w/w) aqueous glucose solution? (Molar mass of glucose = 180 g mol\(^{-1}\))
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.