Chemical Equilibrium Test

Result

Chemical Equilibrium Test - 45

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Weekly Quiz Competition

Question 1
4 / -1

The P^H of neutral water is 6.8 .Then the temperature of H₂O

A
is 25⁰ C

B
is more than 25⁰ C

C
is less than 25⁰ C

D
can not be predicted.

Solution
Question 2
4 / -1

The ionzation constant of formic acid is 7.8 × 10^-4 . Calculate ratio of sodium formate & formic acid in a buffer of P^H 4.25

A
9.63

B
3.24

C
6.48

D
3.97

Solution
Question 3
4 / -1

The ionization constant of formic acid is 1.8 × 10^-4 around what P^H will its mixture with sodium formate give buffer solution of highest capacity

A
3.74

B
7.48

C
4.37

D
3.96

Solution
Question 4
4 / -1

A certain buffer solution contains equal concentrations of X^- and HX. The K_a for HX is 10^-8 .The P^H of buffer is

A
8

B
3

C
7

D
4

Solution
Question 5
4 / -1

A
2.48

B
8.2

C
5.26

D
9.6

Solution
Question 6
4 / -1

The P^H of solution obtained by mixing 50ml 0.4 N HCl & 50ml 0.2 N NaOH is

A
- log 2

B
1.0

C
- log 0.2

D
2.0

Solution
Question 7
4 / -1

In the reversible reaction A + B ⇌ C + D , the concentration of each C and D at equilibrium was 0.8 mol litre, then the equilibrium constant K_C will be.

A
6.4

B
0.64

C
0.16

D
16.0

Solution
Question 8
4 / -1

4 moles of A are mixed with 4 moles of B.At equilibrium for the reaction A + B ⇌ C + D 2 moles of C and D are formed . The equilibrium constant for reaction will be

A
1/4

B
4

C
1/2

D
1

Solution
Question 9
4 / -1

A reversible chemical reaction having two reactants in equilibrium. If the concentration of the reactants are doubled, then equilibrium constantwill

A
become double

B
become half

C
become 4 times

D
remains same
Question 10
4 / -1

If in the reaction N₂O₄ ⇌ 2NO₂ , α is that part of N₂O₄ will dissociate, then the number of moles at equilibrium will be,

A
3

B
(1 + α)

C
(1 – α)

D
1

Solution