Unit II: p-Block Elements I - Online Test
Q1. An aqueous solution of borax is
Answer : Option C
Explaination / Solution:
Q2. Boric acid is an acid because its molecule
Answer : Option D
Explaination / Solution:
B(OH)3 + H2O ↔
[B (OH)4 + H+
Q3. Which among the following is not a borane?
Answer : Option B
Explaination / Solution:
nido borane : BnH4+n
aracno borane : BnH6+n
Q4. Which of the following metals has the largest abundance in the earth’s crust?
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. In diborane, the number of electrons that accounts for banana bonds is
Answer : Option C
Explaination / Solution:
There are two 3c –
2e-bonding in the bridges account for 4 electrons.
Q6. The element that does not show catenation among the following p-block elements is
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. Carbon atoms in fullerene
with formula C60 have
Answer : Option C
Explaination / Solution:
No Explaination.
Q8. Oxidation state of carbon in its hydrides
Answer : Option A
Explaination / Solution:
Example : CH4+
in which the oxidation state of carbon is +4
Q9. The basic structural unit of silicates is
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. The repeating unit in silicone is
Answer : Option B
Explaination / Solution:
No Explaination.
