19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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?
Which of the following statement regarding protium, deuterium and tritium is not correct?
Assertion (A): Hydrogen is the first element in the periodic table. Reason (R): It has electronic configuration 1s .
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 …
Which of the following explanations justifies not placing hydrogen in either the group of alkali metals or halogens?
The hardness of water is estimated by (Manipal 2004)
Which of the following is an atom of tritium? (a) (b) (c) (d)
Which of the following compounds is used for water softening? (a) Ca PO (b) Na PO (c) Na P O (d) Na HPO
The exhausted cation and anion exchange resin beds are regenerated by treatment with
Temporary hardness of water is due to the presence of
Which of the following reactions shows reduction of water ?
Presence of water can be detected by
Given below are two reactions of water with sodium and carbon dioxide. What is the nature of water in these reactions? (i) 2Na + 2H2O -> 2NaOH + H2 (ii) 6CO2 + 12H2O -> C6H12O6 + 6H2O + 6O2
Which gas is produced when calcium nitride (Ca3N2) is hydrolysed by water?
Liquid water is denser than ice due to
The density of water is less in its solid state because
Which is not a property of water ?
Non-stoichiometric hydrides are produced by
Given below are the elements and the type of hydrides formed by them. Mark the incorrect match.
Which of the following statements regarding hydrides is not correct?
Carbon hydride of the type, CnH2n+2 do not act as Lewis acid or Lewis base. They behave as normal covalent hydrides because
Which of the following statements is correct regarding hydrogen?
Which of the following metals does not liberate hydrogen from acids?
Pure nascent hydrogen is best obtained by
Very pure hydrogen (99.9%) can be made by which of the following processes?