List of top Chemistry Questions

The particle size in a colloidal solution is:
Tyndall effect is produced by:
Tyndall effect is exhibited by:
A true solution does not show Tyndall effect, because of the:
The solvent used to prepare aqueous solutions is:
Solutions are classified into aqueous and non-aqueous solutions, based on:
The following initial rate data were obtained for the reaction: \[ 2\text{NO (g)} + \text{Br}_2 \text{(g)} \rightarrow 2 \text{NOBr (g)} \] initial rate data were obtained for the reaction
The vapour pressure of a solvent at 283 K is 100 mm Hg. Calculate the vapour pressure of a dilute solution containing 1 mole of a strong electrolyte AB in 50 moles of the solvent at 283 K (assuming complete dissociation of solute AB).
A molecule X associates in a given solvent as per the following equation:
X ⇌ (X)n
For a given concentration of X, the van’t Hoff factor was found to be 0.80 and the
fraction of associated molecules was 0.3. The correct value of ‘n’ is:
Calculate the potential of Iron electrode in which the concentration of Fe2+ ion is 0.01 M. Given \( E^{\circ}_{\text{Fe}^{2+}/\text{Fe}} = -0.45 \, \text{V at 298 K} \)
[Given: log 10 = 1]
How does the size of blood cells change when placed in an aqueous solution containing more than 0.9% (mass/volume) sodium chloride?
A 1% solution of solute ‘X’ is isotonic with a 6% solution of sucrose (molar mass = \( 342 \) g mol\(^{-1}\)). The molar mass of solute ‘X’ is:
The half-life of radio isotopic bromine - 82 is 36 hours. The fraction which remains after one day is ___________ ×10–2.
(Given antilog 0.2006 = 1.587)
Which one of the following will show geometrical isomerism?
Which of the following nitrogen containing compound does not give Lassaigne’s test ?
What are the products N and Q in the following reaction sequences?
What are X and Z in the following sequence of reactions?
What are the correct structural descriptions for M and N?
Consider an exothermic reaction:
2A(s) \(\longrightarrow\) B(s) + C(g) + D(g)
The correct statement about the reaction is
The minimum energy needed to remove an electron from a metal corresponds to a wavelength of 500 nm. What is the total kinetic energy of all the photoelectrons ejected per second when the entire radiation from a 100 Watt bulb with a wavelength of 300 nm falls on the surface of the metal?
Planck’s constant = 6.6 \(\times 10^{-34}\) J s; speed of light = 3 \(\times 10^8\) m s\(^{-1}\)
For a reaction R \(\longrightarrow\) P with a rate constant of 3 \(\times 10^{-3}\) mol L\(^{-1}\) s\(^{-1}\), which one of the following plots is correct?
Which one of the following plots correctly describes the variation of osmotic pressure (H) of a fixed amount of a solute against the volume (V) of the solution at a fixed temperature?
Consider the following data for KCl solution at a particular temperature:
What is the value of the limiting molar conductivity?
What is the correct order of acidity for the following compounds?
What is the relationship between the structures depicted below?