List of top Chemistry Questions

Which of the following do not show geometrical isomerism? (Assume all ligands are unidentate)
Let \( x \) grams of benzoic acid (molar mass = 122 g/mol\(^{-1}\)) be dissolved in 50 g of benzene. Its freezing point was found to be 277.82 K. What is the value of \( x \)? (Given: \( K_f \) of benzene = 5.1 K kg mol\(^{-1}\), freezing point of benzene = 278.45 K, and van't Hoff's factor of benzoic acid = 0.5)

The standard Gibbs free energy change \( \Delta G^\circ \) of a cell reaction is \(-301 { kJ/mol}\). What is \( E^\circ \) in volts? 
(Given: \( F = 96500 { C/mol}\), \( n = 2 \))

From the following identify pairs in which metal is correctly matched with its refining process: 

Identify the anomers from the following. 


 

Which of the following are ambident nucleophiles? 
[A.] CN$^{\,-}$ 
[B.] CH$_{3}$COO$^{\,-}$ 
[C.] NO$_{2}^{\,-}$ 
[D.] CH$_{3}$O$^{\,-}$ 
[E.] NH$_{3}$

The correct sequence of enzymes involved in the commercial production of ethanol by fermentation from sugar is:

What are X and Y respectively in the following set of reactions? 

 

At 298 K, the ionization constant of \( {CN}^- \) is \( 2.08 \times 10^{-6} \). What is the ionization constant of its conjugate acid? (Given \( K_w = 10^{-14} \))
Identify the basic oxide from the following
Which of the following is an essential amino acid?
At 27°C, 100 mL of 0.4 M HCl is mixed with 100 mL of 0.5 M NaOH. To the resultant solution, 800 mL of distilled water is added. What is the pH of the final solution?
Which of the following oxides is acidic in nature?
Lewis concept does explain the behaviour of
Which is the strongest acid?
Derive an expression for maximum work obtainable during isothermal reversible expansion of an ideal gas from initial volume \( V_1 \) to final volume \( V_2 \).
A current of 3.0 A is passed through 750 ml of 0.45 M solution of CuSO₄ for 2 hours with a current efficiency of 90\%. If the volume of the solution is assumed to remain constant, what would be the final molarity of CuSO₄ solution?

If the unit of the rate constant is \( \text{mol} \, (\text{dm}^{-3} \text{s}^{-1}) \), the order of the reaction would be ____________.

The major product D formed in the following reaction sequence is:
reaction sequence
Which of the following substitution reaction with methane requires HIO\(_3\) as an oxidising agent?
Which of the following statement is incorrect?
Which of the following pair exhibits diagonal relationship?

Which of the following are inner orbital paramagnetic complexes? 

Which of the following is used as a substitute for sucrose?
The element Neodymium (Nd) belongs to the 4f series. What is its atomic number?