Chemical Equilibrium Test

Result

Chemical Equilibrium Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

The Bronsted acid which gives the weakest conjugate base is

A
HF

B
H₂S

C
HCI

D
H₂O

Solution

A strong acid gives a weak base. HCl is the strongest acid among the given options and hence, has the weakest conjugate base.
NOTE: Among hydrogen halides, the acidic strength increases down the group as the H-X bond length increases. Hence, HCl is a stronger acid than HF.
Question 2
1 / -0

Which one of the following is not a Lewis base?

A
CN^-

B
ROH

C
NH₃

D
AICI₃

Solution

AICI₃is an electron-deficient compound and hence, it is a Lewis acid because it can accept an electron.
Question 3
1 / -0

pK_a values of four acids are given below at 25°C. Indicate the strongest acid.

A
2.0

B
2.5

C
3.0

D
4.0

Solution

The lesser the pK_a value, stronger is the acid.
Question 4
1 / -0

A solution of equal pH and pOH is called a

A
dilute solution

B
protonic solution

C
neutral solution

D
buffer solution

Solution

Neutral solutions have equal pH and pOH values (7 each) because [H⁺] = [OH^-] = 10^-7