List of top Chemistry Questions

In which of the following changes, entropy decreases?
Barbiturates are used to treat
The monosaccharides of maltose is
On treatment of glucose with bromine water the product formed is
Which of the following vitamin is responsible for beri-beri disease?
How many atoms are present in hcp per unit cell?
The Paschen series of hydrogen spectrum lies in which region?
Which of the following molecules does not exhibit dipole moment?
(i) CCl$_4$
(ii) CO$_2$
(iii) NH$_3$
(iv) CHCl$_3$
(v) H$_2$O
(vi) CH$_3$–O–CH$_3$
Increasing order of bond order of oxygen and its ions is
O\(_2^{−}\), F\(^−\), Mg\(^{2+}\), Al\(^{3+}\), O\(_2\), F\(_2\). How many of the species given above are isoelectronic?
Which of the following gases is responsible for acid rain?
pH of \(10^{-3}\) M solution of KOH is
The essential amino acid are
(i) Leucine
(ii) Glutamic acid
(iii) Asparagine
(iv) Valine
Choose the correct option from the following:
Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is \( 12.04 \times 10^{-2} \, \text{S} \, \text{m}^{-1} \)
Which of the product is not possible in Wurtz reaction?
Which of the following is used to prepare the inner lining of a blast furnace?
Minimum number of nodes are present in
The spectrum of He\(^+\) is similar to
The relation between work done in reversible and irreversible process is
Which of the following is a false statement?
Which of the following compounds does not exist?
Which among the following will not liberate nitrogen on reaction with nitrous acid?
Which of the following statement is incorrect for \( \mathrm{H_2O_2} \) structure?
The P – O bond order in \( \text{PO}_4^{3-} \) is
The complex which does not show optical isomerism is