19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following explanations justifies not placing hydrogen in either the group of alkali metals or halogens?
Which of the following is/are true statement(s) regarding characteristic of hydrogen? I. Hydrogen resembles alkali metals due to the similar outer electronic configuration ns . II. Hydrogen resembles halogens due to …
Assertion (A): Hydrogen is the first element in the periodic table. Reason (R): It has electronic configuration 1s .
Which of the following statement regarding protium, deuterium and tritium is not correct?
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors, which one is the most important in this respect?
Like alkali metals, hydrogen forms I. Oxides and oxyacids. II. Halides and interhalides. III. Oxides, halides and sulphide.
Role of hydrogen peroxide in the below reactions is respectively (CBSE AIPMT 2014) I. H O O H O 2O -> II. H O Ag O 2Ag H O O ->
Which of the following cannot be used as a test for H2O2 ?
H2O2 is obtained by which of the following?
Which of the following is not correct regarding the electrolytic preparation of H2O2?
When zeolite (hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with
Which of the following reactions is not used in preparation or deuterium compounds using heavy water?
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?
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 (…
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
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…
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
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…
Hydrogen can be prepared by the action of dil. H2SO4 on
Tritium, a radioactive isotope of hydrogen, emits which of the following particles? (NEET 2021)
Match the following and identify the correct option. (NEET 2020) Column I Column II
The number of hydrogen bonded water molecule(s) associated with CuSO4.5H2O is (Odisha NEET 2019)
The method used to remove temporary hardness of water is (NEET 2019)
Which of the following statements about hydrogen is incorrect? (NEET 2016)
The moderator used in nuclear reactor is (UP CPMT 2014)