19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
When H₂S gas is passed into aqueous sulphur dioxide
Which of the following compounds does not form ammonia on heating?
Assertion: Equivalent weight of a base molecular weight = acidity Reason: Acidity is the number of replaceable hydrogen atom in one molecule of the base.
Assertion :Both 12g of carbon and 27g of aluminium contain 6.023 × 1023 atoms. Reason :Molar mass of an element contains Avogadro number of atoms.
Assertion :Pure water obtained from different states of India always contains hydrogen and oxygen in the ratio of 1 : 8 by mass. Reason: Total mass of reactants and products during chemical change is always the same.
A solution of NaOH is prepared by dissolving 4.0 g of NaOH in 1 L of water. Calculate the volume of the HCl gas at STP that will neutralize 50 mL of this solution.
The total number of electrons present in 18 ml of water (density of water is 1 g ml–1) is
Volume of acid that contains 63g pure acid is.
Volume of water required to make 1N solution from 2 mL conc. HNO₃.
Normality of acid is.
HCl is 80% ionised in 0.01 M aqueous solution. The equilibrium molarity of HCl in the solution is
The molarity of 68 % of H₂SO₄ whose density is 1.84 g/cc is
Calculate the analytical molarity of Cl– ion in solution which is prepared by mixing 100 ml of 0.1 M NaCl and 400 ml of 0.01 M BaCl₂.
The following process has been used to obtain iodine from oil-field brines in California. NaI + AgNO₃ → AgI + NaNO₃ AgI + Fe → FeI₂ + Ag FeI₂ + Cl₂ → FeCl₃ + I₂ If 381 kg of iodine is produced per hour then mass of A…
NX is produced by the following step of reactions M + X2 → M X2 MX2 + X2 → M3X8 M3X8 + N₂CO₃ → N X + CO₂ + M3O₄ How much M (metal) is consumed to produce 206 gm of NX. (Take At. wt of M = 56, N=23, X = 80)
Assertion : 1mole of H₂SO₄ is neutralised by 2 moles of NaOH but 1 equivalent of H₂SO₄ is neutralised by 1 equivalent of NaOH. Reason : Equivalent weight of H₂SO₄ is half of its molecular weight while e…
Assertion :For a binary solution of two liquids, A and B, with the knowledge of density of solution, molarity can be converted into molality. Reason: Molarity is defined in terms of volume and molality …
Assertion : If 30 mL of H₂ and 20 mL of O₂ react to form water, 5 mL of H₂ is left at the end of the reaction Reason :H₂ is the limiting reagent.
Assertion :Number of molecules present in SO₂ is twice the number of molecules present in O₂. Reason : Molecular mass of SO₂ is double to that of O₂.
Assertion : Both 138 g of K₂CO₃ and 12 g of carbon have same number of carbon atoms. Reason : Both contains 1 g atom of carbon which contains 6.022 × 1023 carbon atoms.
5 mL of N-HCl, 20 mL of N/2 H₂SO₄ milli equivalent and 30 mL of N/3 HNO₃ are mixed together and the volume is made to 1L. The normality of the resulting solution is
N₂ + 3H₂ → 2NH₃ Molecular weight of NH₃ and N₂ are x1 and x2, respectively. Their equivalent weights are y1 and y2, respectively. Then (y1 – y2) is (a) 2x x
Given the reaction : Na O(s) H O( ) 2NaOH(aq) → l What is the molarity of the solution formed if 1.35g of Na₂O is mixed with H₂O such that the final volume is 100 mL?
A solution containing 12.0% NaOH by mass has a density of 1.131 g/mL. What volume of this solution contains 5.00 mol of NaOH ?
1 mole of oxalic acid is treated with conc. H₂SO₄. The resultant gaseous mixture is passed through a solution of KOH. The mass of KOH consumed will be (where KOH absorbs CO₂.) (COOH)₂ CO + CO₂ + H₂O 2 KOH + CO₂…