Equilibrium Test

Result

Equilibrium Test - 62

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Weekly Quiz Competition

Question 1
1 / -0

For the reaction $$ 2X_ { (g)} + Y_ { (g)} \rightleftharpoons 2Z_ { (g)} ; \triangle H = -80 K cal $$. The highest yield of Z at equilibrium occurs at

A
$$ 1000 atm$$ and $$500^\circ C $$

B
$$ 500 atm $$ and $$500^\circ C $$

C
$$ 1000 atm$$ and $$100^\circ C $$

D
$$ 500 atm$$ and $$100^\circ C $$
Question 2
1 / -0

For an acidic indicator has $$K_{a}$$ value of $$10^{-5}$$. The $$\%$$ basic form when $$pH$$ equal to $$5.3$$ is :
[Given $$\log 2=0.3$$]

A
$$33.33$$

B
$$66.66$$

C
$$99$$

D
None of the above

Solution
Question 3
1 / -0

When a strong base $$NaOH$$ is added to the acidic buffer containing $$CH_3COOH+CH_3COONa$$ then which of the following reaction occurs?

A
$$CH_3COOH+NaOH \rightarrow CH_3COONa+H_2O$$

B
$$CH_3COOH+OH^-\rightarrow CH_3COO^-+H_2O$$

C
$$CH_3COONa +NaOH\rightarrow CH_3COO^-+2Na^+OH^-$$

D
Both A and B

Solution
Question 4
1 / -0

Which of the following combination will act as a buffer?

A
$$NH_{3}+HCl$$ (Molar ratio 1:2 )

B
$$CH_{3}COOH + NaOH$$ (Molar ratio 2:1)

C
$$HCl+NaCl$$ (Molar ratio 1:1)

D
$$NaOH+CH_{3}COOH$$ (Molar ratio 1:1)

Solution
Question 5
1 / -0

$$HCOO^- + H_2O \rightleftharpoons HCOOH + OH^-$$ is related:-

A
$$h=\sqrt{K_h}$$

B
$$h=\sqrt{\frac{K_h}{C}}$$

C
$$h=\sqrt{\frac{K_h}{V}}$$

D
$$K_h= \sqrt{hc}$$

Solution
Question 6
1 / -0

Number of buffers can be made by reaction of $$ H_3PO_4 $$ and NaOH is

A
3

B
1

C
4

D
2

Solution
Question 7
1 / -0

Which of the following is a buffer solution?

A
$$\begin{gathered}
\,500mL\,of\,0.1\,N\,C{H_3}COOH + 500\,mL\,\,Of\,0.1\,N\,NaOH \hfill \\
\hfill \\
\end{gathered} $$

B
$$\begin{gathered}
\,500mL\,of\,0.1\,N\,C{H_3}COOH + 500\,mL\,\,Of\,0.1\,N\,HCI \hfill \\
\hfill \\
\end{gathered} $$

C
$$\begin{gathered}
\,500mL\,of\,0.1\,N\,C{H_3}COOH + 500\,mL\,\,Of\,0.2\,N\,NaOH \hfill \\
\hfill \\
\end{gathered} $$

D
$$\begin{gathered}
\,500mL\,of\,0.2\,N\,C{H_3}COOH + 500\,mL\,\,Of\,0.1\,N\,NaOH \hfill \\
\hfill \\
\end{gathered} $$

Solution
Question 8
1 / -0

In the reaction:
$$ N_2O_4(g) \rightleftharpoons 2NO_2(g) $$
On reducing the pressure, the reaction shifts in forward direction. This is because on reducing pressure:

A
$$ Q_C $$ increases while $$ K_c $$ remains constant

B
$$ Q_C $$ decreases while $$ K_c $$ remains constant

C
$$ Q_C $$ remains constant while $$ K_c $$ decreases

D
$$ Q_C $$ remains constant while $$ K_c $$ increases

Solution
Question 9
1 / -0

pH of $$0.01M (NH_4)_2SO_4$$ and $$0.02M$$ $$NH_4OH$$ buffer $$(pK_{a\ (NH_4^+)}=9.26)$$ is

A
$$9.26+ log1$$

B
$$9.26 +log2$$

C
$$4.74$$

D
$$4.74 +log2$$

Solution
Question 10
1 / -0

The total pressure at equilibrium for the dissociation, $$PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)$$ is 2 atm. One mole of helium is now introduced into the same vessel containing the reaction mixture. The equilibrium constant will:

A
increase

B
decrease

C
remains unchanged

D
depend upon the amount of helium added