Chemistry - Online Test
Q1. pH
of a saturated solution of Ca(OH)2 is 9. The Solubility product ( Ksp )of
Ca(OH)2
Answer : Option A
Explaination / Solution:
Ca(OH)2 ↔ Ca2+
+ 2OH-
Given that pH = 9
pOH = 14-9 = 5
[pOH = -log10 [OH- ]]
∴[OH- ] = 10- pOH
[OH- ]=10-5
M
Ksp =[Ca2+
][OH- ]2
= (10-5 /2 )×(10-5 )2
=0.5 ×10-15
Q2. The
molar conductivity of a 0.5 mol dm-3 solution of AgNO3
with electrolytic conductivity of 5.76 ×10−3 S cm−1 at 298 K is
Answer : Option B
Explaination / Solution:
Λ = κ/M ×10−3 mol−1 m3
= [( 5.76 × 10−3 S cm−1 ×10−3 ) / (0. 5)]
mol−1m3
= [(5.76 × 10−3 × 10−3 ×106 ) / (0.5)] S cm−1mol−1 cm3 .
= 11.52 S cm2 mol−1
Q3.
Assertion : Coagulation power of Al3+ is more than Na+
.
Answer : Option A
Explaination / Solution:
(Hardy-Schulze rule)
Q4. Which one of the following is the strongest acid
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. The body of leech has
Answer : Option B
Explaination / Solution:
No Explaination.
Q6. Which of the following process requires energy?
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. 
Answer : Option C
Explaination / Solution:
X-HCHO
Y-(CH2 )6N4
Q8. The outer most of the three cranial meninges is
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. To increase the sugar production in sugarcanes they are sprayed with _______
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. 
Answer : Option C
Explaination / Solution:
