List of top Chemistry Questions

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 $= 122\operatorname{g mol^{-1}}$)
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?
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
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:
The molarity of a solution containing 4 g of NaOH in 250 mL solution is:
Compound of which transition metal ion is colourless?
The number of elements present in the fifth period of the modern periodic table:
Given below are two statements: Statement (I): The boiling points of alcohols and phenols increase with increase in the number of C-atoms.
Statement (II): The boiling points of alcohols and phenols are higher in comparison to other classes of compounds such as ethers and haloalkanes. In the light of the above statements, choose the correct answer from the options given below:
Identify A, B, and C in the given reaction sequence: \[ \text{A} \xrightarrow{\text{HNO}_3} \text{Pb(NO}_3)_2 \xrightarrow{\text{H}_2\text{SO}_4} \text{B} \rightarrow \text{C (Yellow ppt)}. \]
For a reaction, $$ {N}_2{O}_5(g) \rightarrow 2{NO}_2(g) + \frac{1}{2} {O}_2(g) $$ in a constant volume container, no products were present initially. The final pressure of the system when 50% of the reaction gets completed is: 
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 product formed when magnesium ribbon is burnt in oxygen?
What is the law of conservation of mass?
Which of the following gases is produced when zinc reacts with dilute hydrochloric acid?
What is the law of conservation of mass?
Which one of the following processes involves chemical change?
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 of the following oxides is amphoteric in nature?
What is the major product when 1-bromopropane undergoes nucleophilic substitution with \(OH^-\)?
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.