List of top Chemistry Questions

Which of the following does not exist?

 The functional groups present in the product ‘X’ of the reaction given below are:

The set of elements which obey the general electronic configuration \( (n-1)d^{10} ns^2 \) is:}

The major components of cement are:
Methemoglobinemia is due to:

The IUPAC name of the following compound is: 

The dihedral angles in gaseous and solid phases of H\(_2\)O\(_2\) molecule respectively are
If the density of a mixture of nitrogen and oxygen gases at 400 K and 1 atm pressure is 0.920 g L\(^{-1}\), what is the mole fraction of nitrogen in the mixture?
In which of the following, ions are correctly arranged in the increasing order of oxidizing power?
In the given sequence of reactions: \[ \text{P}_4 + \text{NaOH} + \text{H}_2\text{O} \;\longrightarrow\; \dots \;\longrightarrow\; X \;+\; 2\,\text{NaH}_2\text{PO}_2 \;\longrightarrow\; \dots \] The final product obtained with copper and \(\text{H}_2\text{SO}_4\) is:
Identify the pair of elements in which the difference in atomic radii is maximum.
At 61 K, one mole of an ideal gas of 1.0 L volume expands isothermally and reversibly to a final volume of 10.0 L. What is the work done in the expansion?
Acrolein (X) is one of the chemicals formed when \( O_3 \) and \( NO_2 \) react with unburnt hydrocarbons present in polluted air. The structure of 'X' is:
At T(K), \( K_c \) for the dissociation of \( PCl_5 \) is \( 2 \times 10^{-2} \) mol L\(^{-1}\). The number of moles of \( PCl_5 \) that must be taken in 1.0 L flask at the same temperature to get 0.2 mol of chlorine at equilibrium is

Compound ‘A’ on heating with soda lime gives propane. Identify the compound 'A'.

Match the following: 

The pair of molecules/ions with same geometry but central atoms in different states of hybridization is:
The monomer which is present in both Bakelite and Melamine polymers is:
Which of the following will have a spin-only magnetic moment of 2.86 BM?
Cellulose is a polysaccharide and is made of:

The correct IUPAC name of the given compound is:

Which of the following is an example of allylic halide?
Identify the pair in which the difference in bond order value is maximum.

Match the following elements with their respective blocks in the periodic table:
 

In the reaction: \[ \text{Pt} + 3:1 \,\text{mixture of} \,(\text{conc. HCl} + \text{conc. HNO}_3) \rightarrow [\text{X}]^{2-}, \] What is the oxidation state of Pt in the complex ion \([X]^{2-}\)?