Chemistry Question Bank

Phosphorus cannot form PH5 with its outer electronic configuration as 3s2, 3p3 because

Which of the statements given below are true for the water molecule structure? (i) Oxygen undergoes sp3hybridisation. (ii) Due to presence of two lone pairs of electrons on oxygen the H–O–H bonds angle is 118.4°. (ii…

Choose the correct statement about the given figures.

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…

Which of the following cannot be used as a test for H2O2 ?

Blackened oil painting can be restored into original form by the action of

Which of the following equation depicts reducing nature of H2O2?

What will be the mass of oxygen liberated by decomposition of 200 mL hydrogen peroxide solution with a strength of 34 g per litre ?

What is the volume of “20 volume H2O2” required to get 5000 cm3 of oxygen at STP ?

The volume of oxygen liberated from 15 mL of 20 volume H2O2 is

A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly

Assertion: Increasing pressure on pure water decreases its freezing point. Reason: Density of water is maximum at 4° C.

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 …

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)

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)

Assertion: Permanent hardness of water can be removed by using washing soda. Reason: Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates.

Assertion: Anhydrous BaO2 (barium peroxide) is used for preparing H2O2. Reason: Hydrated BaO2 is not available.

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…

At its melting point, ice is lighter than water because (AIPMT 1992)

Water gas is produced by (AIPMT 1992)

Hydrogenation of vegetable oils using nickel as a catalyst gives edible fats which is/are known as