List of top Chemistry Questions

Calculate the amount of \( CO_2 \) gas produced, when \( 32 \)g of \( CH_4 \) is burned with sufficient amount of oxygen (Given atomic weight of \( C=12, O=16 \) and \( H=1 \))

Identify the correct set of molecules with zero dipole moment.

The IUPAC name of an element with atomic number \( 119 \) is:

Identify the correct set of molecules with zero dipole moment:

The energy of the second bohr orbit of the hydrogen atom is $-328 \text{ kJ mol}^{-1}$; hence the energy of the fourth bohr orbit would be:

Which of the following sets are correctly matched? {|c|c|c|} Set & Molecule & Geometry
I & $\text{BrF}_5$ & Square pyramidal
II & $\text{XeF}_6$ & Distorted octahedral
III & $\text{SF}_4$ & Square planar
IV & $\text{PbCl}_2$ & Linear

Consider the equilibrium reactions:

The equilibrium constant, $K_c$, for the overall dissociation \[ H_3PO_4 \rightleftharpoons 3H^+ + PO_4^{3-} \] is:

Identify the correct set of molecules with zero dipole moment:

Which of the following orders is not correct for the given property?

The IUPAC name of an element with atomic number 119 is:

The energy of the second bohr orbit of the hydrogen atom is $-328 \, \text{kJ mol}^{-1}$; hence the energy of the fourth bohr orbit would be:

The radius in the hydrogen atom in the ground state is $0.53$ \AA. The radius of $Li^{+2}$ ion (atomic number $= 3$) in a similar state is \ldots..

Which of the following are fat soluble vitamins?
(A) Vitamin A
(B) Vitamin B
(C) Vitamin D
(D) Vitamin E
(E) Vitamin K
Choose the correct answer from the options given below:

Which of the following compounds will not undergo an Azo coupling reaction?

Which of the following solutions is isotonic with human blood?

When blood cells are placed in \(1%\) (w/v) NaCl aqueous solution, what will happen to the cells?

Which of the following complexes shows maximum number of unpaired electrons?

The SI unit of rate constant for a first order reaction is:

The major product formed in the following reaction is: \[ CH_3CH=CH_2 \xrightarrow{HBr,\ peroxide} \ ? \]

Among the following compounds, the correct order of acidic strength is: \[ \text{Phenol},\quad p\text{-Nitrophenol},\quad p\text{-Methoxyphenol} \]

Aniline is converted into benzene by the following sequence of reactions: \[ \text{Aniline} \xrightarrow[\text{0--5}^\circ C]{NaNO_2/HCl A \xrightarrow{H_3PO_2} B \] The compounds \(A\) and \(B\) respectively are:}

Which of the following solutions will conduct electricity most effectively?

The hybridization of carbon atom in \(CH_4\) molecule is:

The number of sigma \((\sigma)\) and pi \((\pi)\) bonds respectively in ethene molecule are: