Chemistry - Online Test
Q1. Which of the following is a secondary amine?
Answer : Option C
Explaination / Solution:
N of this amine is bonded to two carbon atoms, therfore it is a secondary amine.
Q2. For ions composed of only one atom, the oxidation number is equal to the
Answer : Option A
Explaination / Solution:
By definition, the oxidation number of an atom is the charge that atom would have if the compound was composed of ions.
The oxidation number of simple ions is equal to the charge on the ion. The oxidation number of sodium in the Na+ ion is +1, for example, and the oxidation number of chlorine in the Cl- ion is -1.
Q3. The molar mass of C6 H10 O5 is
Answer : Option A
Explaination / Solution:
Molar massof C6 H10 O5
= Sum of the atomic masses of six C atoms , ten H atoms & six O atoms
thus , substituting the required atomic masses of
C= 12 ,
H = 1 , &
O = 16 ,
we get ,
Molar mass of C6 H10 O5
= [ 6(12)+10(1)+5(16) ] u
= (72 + 10 + 80 ) u
=162 u
Q4. Ozone can be detected by using
Answer : Option A
Explaination / Solution:
Ozone is detected by using Hg.
Q5. Arrange the following hydrogen halides in order of their decreasing reactivity with propene.
Answer : Option B
Explaination / Solution:
As we move from Cl to I,the atomic size increases,bond length increases,bond strength decreases,hence it becomes easier to release halogen and hence the order.I- is the a better leaving group.
Q6. Which among the following act as forth stabilizer?
Answer : Option D
Explaination / Solution:
Aniline stabalises the froath.
Q7. In a process, 701 J of heat is absorbed by a system and 394 J of work is done by the system. What is the change in internal energy for the process?
Answer : Option C
Explaination / Solution:
ΔU = q + w (1st law of thermodynamics)
q = +701J (heat is absorbed by system)
w = -394 J (work is done by system)
ΔU = 701- 394
= 307J
Q8. is The radius ratio of body centred cubic structure
Answer : Option D
Explaination / Solution:
Its Coordination No. is 8.
Q9. The correct order for the increase in atomic radii is
Answer : Option D
Explaination / Solution:
In a group movig from top to bottom the number of shells increases. So the atomic size increases. Although the effective nuclear charge increases but its effect is negligible in comparison to the effect of increasing number of shells.
Q10. Identify the type of polymer. —A—B—B—A—A—A—B—A—
Answer : Option B
Explaination / Solution:
This is copolymer is polymer made up of different monomers.
