List of top Chemistry Questions asked in AP EAPCET

The carboxylic acid with highest $pK_a$ and lowest $pK_a$ values of the following respectively are:

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.

4 mL of 'X volume' $ \text{H}_2\text{O}_2 $ on heating gives 80 mL of oxygen at STP. The value of X is

Which set of elements form electron-precise hydrides?

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)

What are the mole fractions of glucose and water respectively, in 20% (w/w) aqueous glucose solution? ($C = 12\,u$; $O = 16\,u$; $H = 1\,u$)

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

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$^{-1}$)

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 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?

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?

Consider the following:
Assertion (A): Nitric acid - water mixture is a maximum boiling azeotrope.
Reason (R): Nitric acid - water mixture shows positive deviation from Raoult’s law.

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?

Benzoic acid molecules undergo dimerisation in benzene. 2.44 g of benzoic acid when dissolved in 30 g of benzene caused depression in freezing point of 2 K. What is the percentage of association of it ? (Given $K_f (C_6H_6) = 5\operatorname{K kg mol^{-1}}$; molar mass of benzoic acid $= 122\operatorname{g mol^{-1}}$)

Two acids A and B are titrated separately. 25 mL of 0.5 M Na$_2$CO$_3$ solution requires 10 mL of A and 40 mL of B for complete neutralisation. The volume (in L) of A and B required to produce 1 L of 1 N acid solution respectively are

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

Which of the following oxides is amphoteric in nature?

Consider the following: Statement I: CCl₄ does not undergo hydrolysis. But SiCl₄ undergoes hydrolysis.
Statement II: Thermal and chemical stability of GeX₄ is more than GeX₂.

How many grams of calcium carbonate ($\mathrm{CaCO}_3$) are required to completely neutralize 200 mL of 0.5 M HCl? Given the reaction: $$ \mathrm{CaCO}_3 + 2 \mathrm{HCl} \rightarrow \mathrm{CaCl}_2 + \mathrm{H}_2 \mathrm{O} + \mathrm{CO}_2 $$ (Molar mass of $\mathrm{CaCO}_3 = 100 \, \text{g/mol}$)

What is the number of moles in 88 grams of carbon dioxide (CO₂)?

How many moles of $\mathrm{CO_2}$ are produced when 4 moles of $\mathrm{C_2H_6}$ (ethane) combust completely?
Given reaction: \[ 2 \mathrm{C_2H_6} + 7 \mathrm{O_2} \rightarrow 4 \mathrm{CO_2} + 6 \mathrm{H_2O} \]