Chemistry - Online Test
Q1. Which one of the following rotates the plane polarized light towards left?
Answer : Option C
Explaination / Solution:
No Explaination.
Q2. Hydrogen has the simplest atomic structure among all the elements around us in Nature. Its electronic configuration is
Answer : Option C
Explaination / Solution:
As Hydrogen has 1 electron which fills in orbital of s subshell of First Shell.
Q3. The neurotransmitter that plays a role in mood swings is
Answer : Option C
Explaination / Solution:
Noraderaline is neutrotransmitter which play role in mood swings.
Q4. What
would be the IUPAC name for an element with atomic number 222?
Answer : Option D
Explaination / Solution:
No Explaination.
Q5. For a first order reaction
A → B the rate constant is x min−1 . If the initial concentration of A is 0.01M ,
the concentration of A after one hour is given by the expression.
Answer : Option C
Explaination / Solution:
In this case
k = x min−1 and [A0]
= 0.01M = 1 × 10−2M
t = 1 hour = 60 min
[A]= 1 × 10−2 ( e−60x)
Q6. The gaseous envelope around the earth is known as atmosphere. The region lying between an altitudes of 11-50 km is __________
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. Electrochemistry is the study of production of electricity from
Answer : Option B
Explaination / Solution:
Electrochemistry is branch of chemistry that deals with production of electricity from a chemical reaction or carrying out a non spontaneous reaction using electricity.
Q8. Which of the following is an analgesic?
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. Which
of the following statements about hydrogen is incorrect ?
Answer : Option C
Explaination / Solution:
Correct statement : Hydrogen has
three isotopes of which protium
is the most common.
Q10. Octet of electrons, represents a particularly stable electronic arrangement.. Atoms achieve the stable octet when they are linked by chemical bonds. This rule is associated with one of the following theories
Answer : Option B
Explaination / Solution:
Lewis developed electronic theory of valence or theory of chemical bonding to explain the formation of chemical bond between the two atoms.
According to the electronic theory of valence, every atom tries to attain octet configuration (presence of eight electrons) in its valence shell by losing or gaining or by sharing of electrons. This is known as the "Octet Rule".
The electrostatic forces of attraction that holds the two oppositely charged ions together are known as "electrovalent bond".
