19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The number of hydrogen bonded water molecule(s) associated with CuSO4.5H2O is (Odisha NEET 2019)
Match the following and identify the correct option. (NEET 2020) Column I Column II
Tritium, a radioactive isotope of hydrogen, emits which of the following particles? (NEET 2021)
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°. (ii…
Choose the correct statement about the given figures.
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) Decompositio…
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?
When zeolite (hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with
Which of the following is not correct regarding the electrolytic preparation of H2O2?
H2O2 is obtained by which of the following?
Which of the following cannot be used as a test for H2O2 ?
Blackened oil painting can be restored into original form by the action of
Which of the following equation depicts reducing nature of H2O2?
What will be the mass of oxygen liberated by decomposition of 200 mL hydrogen peroxide solution with a strength of 34 g per litre ?