Chemistry - Online Test
Q1. Which of the following represents the correct order of acidity in the given compounds
Answer : Option A
Explaination / Solution:
-I effect increases the acidity. If electronegativity is high, -I effect is also high.
Q2. Crystal field stabilization
energy for high spin d5 octahedral complex is
Answer : Option B
Explaination / Solution:
The electronic
configuration t2g3, eg2
[3x(-0.4) + 2(0.6)]Δ0
[-1.2 + 1.2]Δ0 =0
Q3. The product formed by the reaction an aldehyde with a primary amine
Answer : Option C
Explaination / Solution:
No Explaination.
Q4. The number of carbon atoms per unit cell of diamond is
Answer : Option A
Explaination / Solution:
in diamond carbon forming fcc.
Carbon occupies corners and face centres and also occupying half of the
tetrahedral voids.
(Nc/8) + (Nf/2)
+ 4 C atomos in Td voids
(8/8) + (6/2) + 4 = 8
Q5. Among the following the achiral amino acid is
Answer : Option C
Explaination / Solution:
No Explaination.
Q6. The addition of a catalyst during a chemical reaction alters which of the following quantities?
Answer : Option B
Explaination / Solution:
A catalyst provides a new path to the reaction with low activation energy. i.e., it lowers the activation energy.
Q7. Terylene is an example of
Answer : Option C
Explaination / Solution:
No Explaination.
Q8. Which of these is not likely to act as Lewis base?
Answer : Option A
Explaination / Solution:
BF3 → elctron deficient → Lewis
acid
PF3 → electron rich → lewis
base
CO → having
lone pair of electron → lewis base
F- → unshared pair of electron → lewis base
Q9. Wolframite ore is separated from tinstone by the process of
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. A
current strength of 3.86 A was passed through molten Calcium oxide for
41minutes and 40 seconds. The mass of Calcium in grams deposited at the cathode
is (atomic mass of Ca is 40g / mol and 1F = 96500C).
Answer : Option B
Explaination / Solution:
m=ZIt
(41min 40sec = 2500 seconds)
Z = m/ (n × 96500) = 40 / (2 ×
96500)
m = Zit
= ( 40 × 3.86 × 2500 ) / (2 × 96500)
= 2g
