List of top Chemistry Questions

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 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 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?
The molarity of a solution containing 4 g of NaOH in 250 mL 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\(^{-1}\)):
The solubility product of AgCl is \(1.8\times10^{-10}\). The solubility in mol/L is:
The pH of 0.01 M NaOH solution is:
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 significance of writing physical states in a chemical equation?
What is the law of conservation of mass?
What is the process called when fats and oils are oxidised and their smell and taste change?
What is the product formed when magnesium ribbon is burnt in oxygen?
What is the law of conservation of mass?
Which one of the following processes involves chemical change?
Which of the following oxides is amphoteric in nature?
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:
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 $\mathrm{CaCO}_3 = 100 \, \text{g/mol}$)
Markovnikov's rule is applicable to which of the following reactions?
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.
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)?
How many atoms are present in 1 mole of oxygen gas (O2)?

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

Consider the following reaction A(g) + 3B(g) \( \longrightarrow \) 2C(g); \( \Delta H^\ominus = -24 \) kJ. At \(25 \, ^\circ\text{C}\) if \( \Delta G^\ominus \) of the reaction is -9 kJ, the standard entropy change (in JK\(^{-1}\)) of the same reaction at same temperature is