List of top Chemistry Questions

Which set of elements form electron-precise hydrides?
Which of the following property is less for D₂O than H₂O?
Identify the correct statements from the following
I.
All alkaline earth metals give hydrides on heating with hydrogen.
II.
Calcium hydroxide is used to purify sugar.
III.
\( \mathrm{BeCl_2} \) is a dimer in gaseous phase.
Which one is a Lewis acid?
Which of the following gases is most soluble in water?
At a given temperature, which of the following statements is correct regarding the solubility of a solid in a liquid?
An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution would be: $ \text{(Given log 2 = 0.30)} $
How many grams of NaOH are required to neutralize 25 mL of 0.1 M HCl solution?
2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is: (Given: Ebullioscopic constant of water = $ 0.52 \, \text{K kg mol}^{-1} $)

Which of the following properties will change when system containing solution 1 will become solution 2 ? 

If equal volumes of AB and XY (both are salts) aqueous solutions are mixed, which of the following combination will give precipitate of AY, at 300 K?

Match List I with List II:
Humidity & & I. Solid in solid
Choose the correct answer from the options given below:

5 moles of liquid X and 10 moles of liquid Y make a solution having a vapor pressure of 70 torr. The vapor pressures of pure X and Y are 63 torr and 78 torr, respectively. Which of the following is true regarding the described solution?
Which of the following gases has the lowest solubility in water at 298 K?
Hardness of water is estimated by titration with
How much water must be added to 500 mL of 2 M $ \mathrm{H_2SO_4} $ solution to make it 0.5 M?
Calculate the molality of a solution prepared by dissolving 10 g of NaCl (\( M = 58.5 \, \text{g/mol} \)) in 500 g of water:
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? (\(C = 12\,u\); \(O = 16\,u\); \(H = 1\,u\))

Calculate the boiling point of a solution containing 18 g of glucose (C\(_6\)H\(12\)O\(_6\)) in 100 g of water. (K₋b = 0.52°C·kg/mol, Molar mass of glucose = 180 g/mol)

A liquid mixture of aniline and 'x' forms a non-ideal solution with negative deviation from Raoult's law. What is 'x'?
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
 

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?
In an aqueous glucose solution, the mole fraction of water is 40 times the mole fraction of glucose. What is the weight percentage (w/w) of glucose in the solution?