List of top Chemistry Questions

On electrolysis of aqueous sodium butanoate, the hydrocarbon formed contains how many carbon atoms?

Assertion (A): 1-Bromopentane reacts with AgCN to give pentyl isocyanide.
Reason (R): AgCN is mainly ionic in nature.

What is the functional group present in serine, an amino acid, in addition to \( -\text{NH}_2 \) and \( -\text{COOH} \) groups?

Curdling of milk is caused due to the formation of which of the following acids by bacteria?

The rate for \( S_N1 \) reaction will be faster for which of the following bromides?

The shapes of \( \text{XeF}_2 \), \( \text{XeF}_4 \), and \( \text{XeO}_3 \) respectively are:

Calculated magnetic moment value for \( \text{Fe}^{2+} \) ion in Bohr Magnetons (BM) is:

In ruby and emerald, the metal ion(s) present is/are:

The sol formed in the following unbalanced equation is: \[ \text{As}_2\text{O}_3 + \text{H}_2\text{S} \rightarrow ? \]

Which of the following condition is correct for reverse osmosis?

Which of the following pair of solutions is isotonic?
(A) 18 g/L of glucose and 6 g/L of urea solution
(B) 10 g/L of glucose and 10 g/L of urea solution
(C) 0.01 M NaOH and 0.02 M glucose solution
(D) 0.01 M NaCl and 0.01 M glucose solution (NaCl undergoes complete dissociation)

Resistance of a conductivity cell filled with \(0.1\, \text{mol L}^{-1}\) NaCl is 100 \(\Omega\).
Resistance of the same cell with \(0.02\, \text{mol L}^{-1}\) NaCl = 258 \(\Omega\). Conductivity of \(0.1\, \text{mol L}^{-1}\) NaCl = \(1.29\, \text{S m}^{-1}\). What is conductivity of 0.02 M NaCl?

The element with highest electronegativity after fluorine is:

Given: \[ \text{CH}_3\text{COOC}_2\text{H}_5 + \text{H}_2\text{O} \rightarrow \text{CH}_3\text{COOH} + \text{C}_2\text{H}_5\text{OH} \] Initial concentrations: Ethyl acetate = 0.001 M, Water = 2 M 99% hydrolyzed in 10 s. Find rate constant \( k \).

The colloidal solution used to treat stomach disorders is:

Metal ‘M’ in the following reaction is: \[ 2 \text{MNO}_3 \rightarrow \text{M}_2\text{O} + 2\text{NO}_2 + \frac{1}{2}\text{O}_2 \]

The product ‘Q’ of the following reactions is:

The correct statements with respect to halides of group 14 elements are:
(I) Both CCl4 and SiCl4 undergo hydrolysis.
(II) GeX4 is more stable than GeX2.
(III) PbX4 is less stable than PbX2.
(IV) Stability of dihalides decreases down the group.

Elements A and B have FCC and BCC structures respectively with unit cell edge length \( a = 3 \, \text{Å} \).
The number of atoms in 210 g of A = number of atoms in 594 g of B.
If density of A is \( 7 \, \text{g/cm}^3 \), what is the density of B?

The anions (A) of \( \text{C}_p\text{A}_q \) molecule form an fcc lattice. Cations (C) are positioned at the body center and half of the edge centers. The formula of the molecule is:

The reaction of diborane in diethyl ether with X gives metal borohydride. X is a:

The correct order of acidic nature of the following alkynes is:
I. \( \text{C}_2\text{H}_2 \)
II. \( (\text{CH}_3)_2\text{C}_2 \)
III. \( (\text{CH}_3)\text{C}_2\text{H} \)

The compound that is used in smoke screens is:

The \( K_a \) values of A, B, and C are \( 1.8 \times 10^{-4} \), \( 5 \times 10^{-10} \), and \( 3 \times 10^{-8} \), respectively.
The correct order of their acidic strength is: