List of top Chemistry Questions

Identify the product of the following reaction:

Example of an ambident nucleophile is

Electrophilic halogenation of phenol does not require catalyst because

During the adsorption of gas on the surface of solid, which of the following is true?

The hybridization of nitrogen in diethyl amine is

Which of the following statement is true for aqueous solution of 0.1 M urea, 0.2 M glucose nad 0.3 M sucrose

When the valence d orbitals of the central metal ion in tetrahedral complex are split in energy levels in CFT, which orbitals are raised to higher energy?

How many enolizable hydrogens are there in the compound 2-methylcyclohex-2- en -1 -one?

Following reaction can produce three products. The order of their amount is

A weak acid with pKa 5.9 and weak base with pKb 5.8 are mixed in equal proportions. pH of the resulting solution is
The conductivity of centimolar solution of KCI at 25°C is 0.0210 ohm-1cm-1 and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of the cell constant is :
A sample of water is found to contain 5.85% \((\frac{w}{w})\) of AB (molecular mass 58.5) and 9.50% \((\frac{w}{w})\) XY2 (molecular mass 95). Assuming 80% ionisation of AB and 60% ionisation of XY2 , the freezing point of water sample is
[Given : Kf for water 1.86 K kg mol-1 , Freezing point of pure water is 273 K and A, B and Y are monovalent ions]
Identify the pair of elements with the highest and lowest electronegativity respectively

Which one is an example of heterogenous catalysis?

Identify incorrectly matched set from the following
A 100 L cylinder containing H2 exerted a pressure of 4 atm at 300 K. It was accidentally opened and some H2 was escaped. When it was closed, it exerted a pressure of 3 atm at 300 K. The number of moles of H2 remaining in the cylinder is equal to
Which of the following alloys are correctly matched with their uses? \[ \text{i) Li/Mg} \quad \text{armour plates} \] \[ \text{ii) Cu/Be} \quad \text{high strength springs} \] \[ \text{iii) Mg/Al} \quad \text{aircraft construction} \]
In the Kolbe electrolysis of sodium propanoate, the products X and Y are formed at the respective electrodes. What are X and Y?
20 mL of 0.1 M HCl is added to 30 mL of 0.1 M NaOH. To this solution, extra 50 mL of water was added. What is the molarity of the final solution formed?

The correct statements about Zeolites are: 
1. They are good shape selective catalysts
2. They contain Al-O-Si framework
3. They are not found in nature
4. They are used as catalysts for cracking hydrocarbons in the petrochemical industry.

How many of the following metals can be purified by using zone refining method? Ni, B, Ti, In, Ge, Mn, Ag, Si, Ga

For ozone molecule consider the following: 
1. It is a linear molecule with bond angle $180^\circ$
2. It is an angular molecule with bond angle $117^\circ$
3. The bond lengths of both O-O bonds are same
4. With respect to oxygen it is thermodynamically more stable 
The correct options are

From the list given below, the number of lanthanides which exhibit +4 state in their compounds is: Given lanthanides: Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy
The structure of Gly-Ala (Glycylalanine) is:
The optically inactive compound from the following is: