Acids and Bases
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CHXI07:EQUILIBRIUM

314424 Which of the following is not a conjugate acid base pair ?

1 \(\mathrm{HPO}_{3}^{2-}, \mathrm{PO}_{3}^{3-}\)
2 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{HPO}_{4}^{2-}\)
3 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{H}_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{PO}_{3}^{3-}\).
CHXI07:EQUILIBRIUM

314425 Consider the following acid - base equilibrium \(\mathop {{{\text{H}}_{\text{2}}}{\text{O(l)}}}\limits_{\text{A}} {\text{ + }}\mathop {{\text{N}}{{\text{H}}_{\text{3}}}{\text{(aq)}}}\limits_{\text{B}} \rightleftharpoons \mathop {{\text{O}}{{\text{H}}^{{\text{ - }}}}}\limits_{\text{C}} {\text{ + }}\mathop {{\text{NH}}_{\text{4}}^{{\text{ + }}}{\text{(aq)}}}\limits_{\text{D}} {\text{ }}\)
Choose the correct option regarding above reaction:

1 \(\mathrm{C}\) is conjugate base of \(\mathrm{B}\)
2 \(\mathrm{D}\) is conjugate acid of \(\mathrm{B}\) but not of \(\mathrm{A}\)
3 \(\mathrm{C}\) is conjugate base of \(\mathrm{A}\) while \(\mathrm{D}\) is conjugate base of B
4 B provides amphoteric medium
CHXI07:EQUILIBRIUM

314426 Which one of the following species acts only as a base?

1 \(\mathrm{H}_{2} \mathrm{~S}\)
2 \(\mathrm{HS}^{-}\)
3 \(\mathrm{S}^{2-}\)
4 \(\mathrm{H}_{2} \mathrm{O}\)
CHXI07:EQUILIBRIUM

314427 NaH, when dissolved in water, produces

1 acidic medium
2 basic medium
3 neutral medium
4 cannot be predicted
CHXI07:EQUILIBRIUM

314428 Which of the following is the strongest base?

1 \(\mathrm{Cl}^{-}\)
2 \(\mathrm{OH}^{-}\)
3 \({\text{C}}{{\text{H}}_3}{{\text{O}}^ - }\)
4 \({\text{C}}{{\text{H}}_3}{\text{CO}}{{\text{O}}^ - }\)
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CHXI07:EQUILIBRIUM

314424 Which of the following is not a conjugate acid base pair ?

1 \(\mathrm{HPO}_{3}^{2-}, \mathrm{PO}_{3}^{3-}\)
2 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{HPO}_{4}^{2-}\)
3 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{H}_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{PO}_{3}^{3-}\).
CHXI07:EQUILIBRIUM

314425 Consider the following acid - base equilibrium \(\mathop {{{\text{H}}_{\text{2}}}{\text{O(l)}}}\limits_{\text{A}} {\text{ + }}\mathop {{\text{N}}{{\text{H}}_{\text{3}}}{\text{(aq)}}}\limits_{\text{B}} \rightleftharpoons \mathop {{\text{O}}{{\text{H}}^{{\text{ - }}}}}\limits_{\text{C}} {\text{ + }}\mathop {{\text{NH}}_{\text{4}}^{{\text{ + }}}{\text{(aq)}}}\limits_{\text{D}} {\text{ }}\)
Choose the correct option regarding above reaction:

1 \(\mathrm{C}\) is conjugate base of \(\mathrm{B}\)
2 \(\mathrm{D}\) is conjugate acid of \(\mathrm{B}\) but not of \(\mathrm{A}\)
3 \(\mathrm{C}\) is conjugate base of \(\mathrm{A}\) while \(\mathrm{D}\) is conjugate base of B
4 B provides amphoteric medium
CHXI07:EQUILIBRIUM

314426 Which one of the following species acts only as a base?

1 \(\mathrm{H}_{2} \mathrm{~S}\)
2 \(\mathrm{HS}^{-}\)
3 \(\mathrm{S}^{2-}\)
4 \(\mathrm{H}_{2} \mathrm{O}\)
CHXI07:EQUILIBRIUM

314427 NaH, when dissolved in water, produces

1 acidic medium
2 basic medium
3 neutral medium
4 cannot be predicted
CHXI07:EQUILIBRIUM

314428 Which of the following is the strongest base?

1 \(\mathrm{Cl}^{-}\)
2 \(\mathrm{OH}^{-}\)
3 \({\text{C}}{{\text{H}}_3}{{\text{O}}^ - }\)
4 \({\text{C}}{{\text{H}}_3}{\text{CO}}{{\text{O}}^ - }\)
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CHXI07:EQUILIBRIUM

314424 Which of the following is not a conjugate acid base pair ?

1 \(\mathrm{HPO}_{3}^{2-}, \mathrm{PO}_{3}^{3-}\)
2 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{HPO}_{4}^{2-}\)
3 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{H}_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{PO}_{3}^{3-}\).
CHXI07:EQUILIBRIUM

314425 Consider the following acid - base equilibrium \(\mathop {{{\text{H}}_{\text{2}}}{\text{O(l)}}}\limits_{\text{A}} {\text{ + }}\mathop {{\text{N}}{{\text{H}}_{\text{3}}}{\text{(aq)}}}\limits_{\text{B}} \rightleftharpoons \mathop {{\text{O}}{{\text{H}}^{{\text{ - }}}}}\limits_{\text{C}} {\text{ + }}\mathop {{\text{NH}}_{\text{4}}^{{\text{ + }}}{\text{(aq)}}}\limits_{\text{D}} {\text{ }}\)
Choose the correct option regarding above reaction:

1 \(\mathrm{C}\) is conjugate base of \(\mathrm{B}\)
2 \(\mathrm{D}\) is conjugate acid of \(\mathrm{B}\) but not of \(\mathrm{A}\)
3 \(\mathrm{C}\) is conjugate base of \(\mathrm{A}\) while \(\mathrm{D}\) is conjugate base of B
4 B provides amphoteric medium
CHXI07:EQUILIBRIUM

314426 Which one of the following species acts only as a base?

1 \(\mathrm{H}_{2} \mathrm{~S}\)
2 \(\mathrm{HS}^{-}\)
3 \(\mathrm{S}^{2-}\)
4 \(\mathrm{H}_{2} \mathrm{O}\)
CHXI07:EQUILIBRIUM

314427 NaH, when dissolved in water, produces

1 acidic medium
2 basic medium
3 neutral medium
4 cannot be predicted
CHXI07:EQUILIBRIUM

314428 Which of the following is the strongest base?

1 \(\mathrm{Cl}^{-}\)
2 \(\mathrm{OH}^{-}\)
3 \({\text{C}}{{\text{H}}_3}{{\text{O}}^ - }\)
4 \({\text{C}}{{\text{H}}_3}{\text{CO}}{{\text{O}}^ - }\)
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CHXI07:EQUILIBRIUM

314424 Which of the following is not a conjugate acid base pair ?

1 \(\mathrm{HPO}_{3}^{2-}, \mathrm{PO}_{3}^{3-}\)
2 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{HPO}_{4}^{2-}\)
3 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{H}_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{PO}_{3}^{3-}\).
CHXI07:EQUILIBRIUM

314425 Consider the following acid - base equilibrium \(\mathop {{{\text{H}}_{\text{2}}}{\text{O(l)}}}\limits_{\text{A}} {\text{ + }}\mathop {{\text{N}}{{\text{H}}_{\text{3}}}{\text{(aq)}}}\limits_{\text{B}} \rightleftharpoons \mathop {{\text{O}}{{\text{H}}^{{\text{ - }}}}}\limits_{\text{C}} {\text{ + }}\mathop {{\text{NH}}_{\text{4}}^{{\text{ + }}}{\text{(aq)}}}\limits_{\text{D}} {\text{ }}\)
Choose the correct option regarding above reaction:

1 \(\mathrm{C}\) is conjugate base of \(\mathrm{B}\)
2 \(\mathrm{D}\) is conjugate acid of \(\mathrm{B}\) but not of \(\mathrm{A}\)
3 \(\mathrm{C}\) is conjugate base of \(\mathrm{A}\) while \(\mathrm{D}\) is conjugate base of B
4 B provides amphoteric medium
CHXI07:EQUILIBRIUM

314426 Which one of the following species acts only as a base?

1 \(\mathrm{H}_{2} \mathrm{~S}\)
2 \(\mathrm{HS}^{-}\)
3 \(\mathrm{S}^{2-}\)
4 \(\mathrm{H}_{2} \mathrm{O}\)
CHXI07:EQUILIBRIUM

314427 NaH, when dissolved in water, produces

1 acidic medium
2 basic medium
3 neutral medium
4 cannot be predicted
CHXI07:EQUILIBRIUM

314428 Which of the following is the strongest base?

1 \(\mathrm{Cl}^{-}\)
2 \(\mathrm{OH}^{-}\)
3 \({\text{C}}{{\text{H}}_3}{{\text{O}}^ - }\)
4 \({\text{C}}{{\text{H}}_3}{\text{CO}}{{\text{O}}^ - }\)
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CHXI07:EQUILIBRIUM

314424 Which of the following is not a conjugate acid base pair ?

1 \(\mathrm{HPO}_{3}^{2-}, \mathrm{PO}_{3}^{3-}\)
2 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{HPO}_{4}^{2-}\)
3 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{H}_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}, \mathrm{PO}_{3}^{3-}\).
CHXI07:EQUILIBRIUM

314425 Consider the following acid - base equilibrium \(\mathop {{{\text{H}}_{\text{2}}}{\text{O(l)}}}\limits_{\text{A}} {\text{ + }}\mathop {{\text{N}}{{\text{H}}_{\text{3}}}{\text{(aq)}}}\limits_{\text{B}} \rightleftharpoons \mathop {{\text{O}}{{\text{H}}^{{\text{ - }}}}}\limits_{\text{C}} {\text{ + }}\mathop {{\text{NH}}_{\text{4}}^{{\text{ + }}}{\text{(aq)}}}\limits_{\text{D}} {\text{ }}\)
Choose the correct option regarding above reaction:

1 \(\mathrm{C}\) is conjugate base of \(\mathrm{B}\)
2 \(\mathrm{D}\) is conjugate acid of \(\mathrm{B}\) but not of \(\mathrm{A}\)
3 \(\mathrm{C}\) is conjugate base of \(\mathrm{A}\) while \(\mathrm{D}\) is conjugate base of B
4 B provides amphoteric medium
CHXI07:EQUILIBRIUM

314426 Which one of the following species acts only as a base?

1 \(\mathrm{H}_{2} \mathrm{~S}\)
2 \(\mathrm{HS}^{-}\)
3 \(\mathrm{S}^{2-}\)
4 \(\mathrm{H}_{2} \mathrm{O}\)
CHXI07:EQUILIBRIUM

314427 NaH, when dissolved in water, produces

1 acidic medium
2 basic medium
3 neutral medium
4 cannot be predicted
CHXI07:EQUILIBRIUM

314428 Which of the following is the strongest base?

1 \(\mathrm{Cl}^{-}\)
2 \(\mathrm{OH}^{-}\)
3 \({\text{C}}{{\text{H}}_3}{{\text{O}}^ - }\)
4 \({\text{C}}{{\text{H}}_3}{\text{CO}}{{\text{O}}^ - }\)