UNIT 4: Hydrogen - Online Test

Q1. Zeolite used to soften hardness of water is, hydrated
Answer : Option A
Explaination / Solution:

Zeolite is sodium aluminium silicate. (NaAlSi2O6 . H2O)

Q2. A commercial sample of hydrogen peroxide marked as 100 volume H2O2, it means that
Answer : Option A
Explaination / Solution:

(a) 1 mL of H2O2 will give 100ml O2 at STP.

Q3. When hydrogen peroxide is shaken with an acidified solution of potassium dichromate in presence of ether, the ethereal layer turns blue due to the formation of
Answer : Option C
Explaination / Solution:

Cr2O72– + 2H+ + 4H2O2 → 2CrO(O2)2 + 5H2O

Q4. For decolourisation of 1 mole of acidified KMnO4, the moles of H2O2 required is
Answer : Option C
Explaination / Solution:

2MnO4 + 5H2O2(aq) + 6H+ → 2Mn2+ + 5O2 + 8H2O

Q5. Volume strength of 1.5 N H2O2 is
Answer : Option D
Explaination / Solution:

Volume strength of hydrogen peroxide = Normality of hydrogen peroxide × 5.6

=1.5 × 5.6

=8.4





Q6. The hybridisation of oxygen atom is H2O and H2O2 are, respectively
Answer : Option D
Explaination / Solution:
No Explaination.


Q7. The reaction H3PO2 + D2O → H2DPO2 + HDO indicates that hypo-phosphorus acid is
Answer : Option C
Explaination / Solution:

Hypophosphorus acid on reaction with D2O, only one hydrogen is replaced by deuterium and hence it is mono basic



Option (c) monobasic acid


Q8. In solid ice, oxygen atom is surrounded
Answer : Option A
Explaination / Solution:

(a) tetrahedrally surrounded by 4  hydrogen  atoms  (refer  4.6  (a) Structure of ice)

Q9. The type of H-bonding present in ortho nitro phenol and p-nitro phenol are respectively
Answer : Option C
Explaination / Solution:



Q10.

Heavy water is used as


Answer : Option C
Explaination / Solution:

Heavy water is used as moderator as well as coolant in nuclear reactions.