19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Assertion: Among the two OH bonds in H2O molecule, the energy required to break the first OH bond and the other OH bond is same. Reason: This is because the electronic environment around oxygen is the same even after …
The O – O – H bond angle in H2O2(g) is about (AIPMT 1994)
Assertion: Increasing pressure on pure water decreases its freezing point. Reason: Density of water is maximum at 4° C.
A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly
The volume of oxygen liberated from 15 mL of 20 volume H2O2 is
What is the volume of “20 volume H2O2” required to get 5000 cm3 of oxygen at STP ?
What will be the mass of oxygen liberated by decomposition of 200 mL hydrogen peroxide solution with a strength of 34 g per litre ?
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…
Choose the correct statement about the given figures.
Phosphorus cannot form PH5 with its outer electronic configuration as 3s2, 3p3 because
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)
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)
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…
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…
A commercial sample of H2O2 marked as 100 volume hydrogen peroxide, it means that (Manipal 2014)
Match the following and identify the correct option. (NEET 2020) Column I Column II
The volume of oxygen evolved at STP by decomposition of 0.68 g ‘20 volume’ hydrogen peroxide solution is (MHT CET 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 ->
Which of the following is electron-deficient? (NEET 2013)
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)