19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Hydrogen can be prepared by the action of dil. H₂SO₄ on
Consider the following statements: 1. Atomic hydrogen is obtained by passing hydrogen through an electric arc. 2. Hydrogen gas will not reduce heated aluminium oxide. 3. Finely divided palladium absorbs large volume o…
Which of the following reaction produces hydrogen?
A metal (M) produces a gas (N) on reaction with alkalis like NaOH and KOH. Same gas is produced when the metals react with dilute sulphuric acid. Gas (N) reacts with another toxic gas (P) to form methanol at high temp…
Match the column I with column II and mark the appropriate choice. Column I Column II (A) NaH (i) Interstitial hydride (B) CH₄ (ii) Molecular hydride (C) VH₀.56 (iii) Ionic hydride (D) B₂H₆ (iv) Electron-deficient hyd…
During hydrate formation from aqueous solution, water can be associated in different forms. Indicate the wrong combination. (i) Coordinated water – [Cr(H₂O)₆]3+ 3Cl– (ii) Interstitial water – BaCl₂.2H₂O (iii) Hydrogen…
What will be the mass of oxygen liberated by decomposition of 200 mL hydrogen peroxide solution with a strength of 34 g per litre ?
Choose the correct statement about the given figures.
What will be the mass of oxygen liberated by decomposition of 200 mL hydrogen peroxide solution with a strength of 34 g per litre ?
Choose the correct statement about the given figures.
Assertion: Permanent hardness of water can be removed by using washing soda. Reason: Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates.
Hydrogen can be prepared by the action of dil. H₂SO₄ on
Consider the following statements: 1. Atomic hydrogen is obtained by passing hydrogen through an electric arc. 2. Hydrogen gas will not reduce heated aluminium oxide. 3. Finely divided palladium absorbs large volume o…
Which of the following reaction produces hydrogen?
A metal (M) produces a gas (N) on reaction with alkalis like NaOH and KOH. Same gas is produced when the metals react with dilute sulphuric acid. Gas (N) reacts with another toxic gas (P) to form methanol at high temp…
Match the column I with column II and mark the appropriate choice. Column I Column II (A) NaH (i) Interstitial hydride (B) CH₄ (ii) Molecular hydride (C) VH₀.56 (iii) Ionic hydride (D) B₂H₆ (iv) Electron-deficient hyd…
Phosphorus cannot form PH₅ with its outer electronic configuration as 3s2, 3p3 because
Which of the statements given below are true for the water molecule structure? (i) Oxygen undergoes sp3hybridisation. (ii) Due to presence of two lone pairs of electrons on oxygen the H–O–H bonds angle is 118.4°. (iii…
Match the reaction of column I with their types given in column II and mark the appropriate choice. Column I Column II (A) H O NH NH OH (i) Self ionisation of H₂O (B) FeCl 3H O → Fe(OH) 3HCl (ii) Decomposition (C) H O…
Study the following reactions and mark the correct properties shown by water. (i) SO₃ + H₂O → H₂SO₄ (ii) Cl₂O₇ + H₂O →2HClO₄ (iii) CaO + H₂O →Ca(OH)₂ (iv) Na₂O + H₂O →2NaOH
During hydrate formation from aqueous solution, water can be associated in different forms. Indicate the wrong combination. (i) Coordinated water – [Cr(H₂O)₆]3+ 3Cl– (ii) Interstitial water – BaCl₂.2H₂O (iii) Hydrogen…
Match the column I with column II and mark the appropriate choice. Column I Column II (A) Syngas (i) Na₆P₆O₁₈ (B) Calgon (ii) NaAlSiO₄ (C) Permutit (iii) CO + H₂ (D) Producer gas (iv) CO + N₂
Match the column I with column II and mark the appropriate choice. Column I Column II (A) Clark’s method (i) Na₆P₆O₁₈ (B) Calgon’s method (ii) NaAlSiO₄ (C) Ion-exchange method (iii) RSO₃H (D) Synthetic resins method (…
The molecular formula of a commercial resin used for exchanging ions in water softening is C₈H₇SO₃Na (Mol. wt. 206). What would be the maximum uptake of Ca²⁺ ions by the resin when expressed in mole per gram resin?
Which of the following reactions is not used in preparation or deuterium compounds using heavy water?