List of top Chemistry Questions

Which of the following gases has the lowest solubility in water at 298 K?
The osmotic pressure of 0.01 molar solution of an electrolyte is found to be 0.65 bar at 27°C. The van’t Hoff factor of the electrolyte is (R = 0.083 bar L K$^{-1}$ mol$^{-1}$)
What are the mole fractions of glucose and water respectively, in 20% (w/w) aqueous glucose solution? (\(C = 12\,u\); \(O = 16\,u\); \(H = 1\,u\))
At T(K), the vapour pressure of an aqueous solution of a non-volatile solute,
whose mole fraction is 0.02 is found to be 34.65 mm Hg.
What is the vapour pressure (in mm Hg) of pure water at the same temperature?
The mole fractions of glucose and water in aqueous glucose solution are 0.0244 and 0.9756 respectively. What is the weight percentage (w/w) of glucose in this solution?

At 298 K, liquid A (solute) forms an ideal solution with liquid B (solvent). The following graph is obtained for this solution.

Identify the correct statements about this graph:
I) x-axis represents the mole fraction of A
II) Point Z represents the vapour pressure of pure solvent
III) x-axis represents the mole fraction of B
 

The solubility product of AgCl is \(1.8\times10^{-10}\). The solubility in mol/L is:
The molarity of a solution containing 4 g of NaOH in 250 mL solution is:
The pH of 0.01 M NaOH solution is:
The osmotic pressure of a 0.1 M solution of NaCl at \(27^\circ\)C is (\(R=0.082\) L atm mol\(^{-1}\) K\(^{-1}\)):
Compound of which transition metal ion is colourless?
The number of elements present in the fifth period of the modern periodic table:
What is the process called when fats and oils are oxidised and their smell and taste change?
What is the significance of writing physical states in a chemical equation?
What is the law of conservation of mass?
What is the law of conservation of mass?
What is the product formed when magnesium ribbon is burnt in oxygen?
The volume of CO\(_2\) liberated in litres at STP when 25 g of CaCO\(_3\) is treated with dilute HCl containing 14.6 g of HCl is:
Which one of the following processes involves chemical change?
Markovnikov's rule is applicable to which of the following reactions?
10 g of (90 percent pure) \( \text{CaCO}_3 \), treated with excess of HCl, gives what mass of \( \text{CO}_2 \)?
What is the number of moles in 88 grams of carbon dioxide (CO2)?
1 mole of an ideal gas is allowed to expand isothermally and reversibly from 1L to 5L at 300 K. The change in enthalpy (in kJ) is
(R = 8.3 J K\(^{-1}\) mol\(^{-1}\))

If 0.01 mol of $\mathrm{P_4O_{10}}$ is removed from 0.1 mol, then the remaining molecules of $\mathrm{P_4O_{10}}$ will be:

The temperature dependence of reaction rates is generally given by the Arrhenius equation. A plot of \( \ln k_r \) against \( 1/T \) is a straight line from which the pre-exponential factor ‘\( A \)’ and the activation energy ‘\( E_a \)’ can be determined.
The CORRECT option regarding this plot is: