List of top Chemistry Questions

The rate law for a reaction between the substances A and B is given by: \[ {Rate} = k[A]^m[B]^n \] On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be:
In a reaction, the threshold energy is equal to:
Indicate the complex ion which shows geometrical isomerism.
In Clemmensen reduction, carbonyl compounds are treated with:
Arrange the following in increasing order of ionic radii: \( C^{4-}, N^{3-}, F^{-}, O^{2-} \).
The product(s) formed when diborane (\( B_2H_6 \)) is hydrolyzed is/are:
Which of the following pairs of compounds is isoelectronic and isostructural?
The compounds \( CH_3CH=CHCH_3 \) and \( CH_3CH_2CH=CH_2 \):

Choose the correct option for the following reactions. 
 

Which of the following exhibits Frenkel defects?

Values of dissociation constant \( K_a \) are given as follows: 
 

Correct order of increasing base strength of the conjugate bases \( {CN}^-, {F}^- \) and \( {NO}_2^- \) is: 
 

The geometry and magnetic behaviour of the complex \([Ni(CO)_4]\) are:

The major product of the following reaction is: 

Which of the following sets of quantum numbers is correct for an electron in a 4f orbital?
Reaction of \( C_6H_5CH_2Br \) with aqueous sodium hydroxide follows:
Which of the following cannot be made by using Williamson's synthesis?
Which property of white phosphorus is common to red phosphorus?
The Allyl cyanide molecule contains:
2-Pentene contains:

Which of the following reactions will yield benzaldehyde as a product? 
 

 

Choose the correct answer from the following options:
 

In the given figure, two equal positive point charges \( q_1 = q_2 = 2.0 \mu C \) interact with a third point charge \( Q = 4.0 \mu C \). The magnitude and direction of the net force on \( Q \) is:
\includegraphics[width=0.5\linewidth]{35.png}
\( P_A \) and \( P_B \) are the vapor pressures of pure liquid components A and B, respectively, in an ideal binary solution. If \( X_A \) represents the mole fraction of component A, the total pressure of the solution will be:

For the below-given cyclic hemiacetal (X), the correct pyranose structure is: 
 

Cuprous ion is colourless while cupric ion is coloured because:
The reason for the greater range of oxidation states in actinoids is attributed to: