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.
