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)
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)
The laboratory method for the preparation of H2O2 is by (UP CPMT 2014)
Strength of H2O2 is 15.18 gL–1, then it is equal to (KCET 2014)
The normality of 20 volume hydrogen peroxide solution is (AMU 2012)
Then zeolite is treated with hard water, the sodium ions are exchanged with (AMU 2012)
Hydrogen is prepared from H2O by adding (DUMET 2011)
Permanent hardness of water is due to the presence of (Kerala CEE 2011)
What is heavy water? (Haryana PMT 2010) (a) H O (b) H O
The maximum number of hydrogen bonds formed by a water molecule in ice is
How many hydrogen bonded water molecules are associated with CuSO4.5H2O?
In which of the following reactions H2O acts as a bronsted acid? (a) 3 aq aq 4 aq H O NH OH NH l (b) aq aq aq H O H S H O HS l (c) aq aq H O H O H O OH l l (d) aq aq H OH H O ( ) ( ) l
Hydrogen sulphide is acidic while water is neutral. The reason is (RPMT 2010)
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 ->
30 volume hydrogen peroxide means (UK PMT 2014)
A commercial sample of H2O2 marked as 100 volume hydrogen peroxide, it means that (Manipal 2014)
Some statements about heavy water are given below. (i) Heavy water is used as moderator in nuclear reactors. (ii) Heavy water is more associated than ordinary water. (iii) Heavy water is more effective solvent than or…
Which is not a property of water ?
The volume of oxygen evolved at STP by decomposition of 0.68 g ‘20 volume’ hydrogen peroxide solution is (MHT CET 2014)
Which of the following reactions shows reduction of water ?
Which gas is produced when calcium nitride (Ca3N2) is hydrolysed by water?
Presence of water can be detected by
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 ->