19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which is not a property of water ?
Which gas is produced when calcium nitride (Ca3N2) is hydrolysed by water?
Water plays a key role in the biosphere. It is due to certain properties of H2O as compared to other liquids. Which of these is not a correct property of water?
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
At its melting point, ice is lighter than water because (AIPMT 1992)
Presence of water can be detected by
Water gas is produced by (AIPMT 1992)
The method used to remove temporary hardness of water is (NEET 2019)
The number of hydrogen bonded water molecule(s) associated with CuSO4.5H2O is (Odisha NEET 2019)
Which of the following statements about hydrogen is incorrect? (NEET 2016)
Match the following and identify the correct option. (NEET 2020) Column I Column II
Strength of H2O2 is 15.18 gL–1, then it is equal to (KCET 2014)
The laboratory method for the preparation of H2O2 is by (UP CPMT 2014)
The moderator used in nuclear reactor is (UP CPMT 2014)
Tritium, a radioactive isotope of hydrogen, emits which of the following particles? (NEET 2021)
The volume of oxygen evolved at STP by decomposition of 0.68 g ‘20 volume’ hydrogen peroxide solution is (MHT CET 2014)
A commercial sample of H2O2 marked as 100 volume hydrogen peroxide, it means that (Manipal 2014)
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 ->
30 volume hydrogen peroxide means (UK PMT 2014)
The normality of 20 volume hydrogen peroxide solution is (AMU 2012)
In which of the following reactions, H2O2 acts as a reducing agent? (EAMCET 2014) (a) H HOCl H O H O Cl O -> (b) OH Mn H O Mn 2OH -> (c) OH 2Fe H O 2Fe 2OH -> (d) H PbS s 4H O aq PbSO s 4H O l ->
Which of the following is electron-deficient? (NEET 2013)
Hydrogen sulphide is acidic while water is neutral. The reason is (RPMT 2010)
What is heavy water? (Haryana PMT 2010) (a) H O (b) H O
Para and ortho hydrogen differ in (RPMT 2010)