314743
Which of the following salt solutions is highly acidic?
1 Ammonium acetate
2 Ammonium cyanide
3 Sodium chloride
4 Ammonium nitrate
Explanation:
\(\mathrm{NH}_{4} \mathrm{NO}_{3}\) is a salt of strong acid, \(\mathrm{HNO}_{3}\) and weak base, \(\mathrm{NH}_{4} \mathrm{OH}\). So highly acidic \(\mathrm{CH}_{3} \mathrm{COONH}_{4}, \mathrm{NH}_{4} \mathrm{CN}\)-almost neutral (WAWB salts) \(\mathrm{NaCl}\) (SA-SB salt), neutral
MHTCET - 2021
CHXI07:EQUILIBRIUM
314716
The order of \(\mathrm{pH}\) of \(0.2 \mathrm{M}\) solutions of \(\mathrm{NH}_{4} \mathrm{NO}_{3}\), \(\mathrm{NaNO}_{3}\) and \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is :
\(\mathrm {\mathrm{NH}_{4} \mathrm{NO}_{3}}\) solution is acidic as it is salt of weak base and strong acid. \(\mathrm {\mathrm{NaNO}_{3}}\) solution is neural as it is salt of strong acid and strong base \(\mathrm {\mathrm{Na}_{2} \mathrm{CO}_{3}}\) solution is alkaline as it is salt of strong base and weak acid.
CHXI07:EQUILIBRIUM
314717
The \(\mathrm{pK}_{\mathrm{b}}\) of dimethylamine and \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid are 3.27 and 4.77 respectively at \({\text{TK}}\). The correct option for the \(\mathrm{pH}\) of dimethylammonium acetate solution is :
314718
Assertion : \(\mathrm{pH}\) of ammonium chloride solution is less than 7. Reason : Solution of a salt of weak base and strong acid is acidic.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Ammonium chloride is formed by the reaction of ammonia \(\left(\mathrm{NH}_{3}\right)\), a weak base, with hydrochloric acid \((\mathrm{HCl})\), a strong acid. The presence of the strong acid \((\mathrm{HCl})\) in this salt means it can readily furnish more \(\mathrm{H}^{+}\)ions to the solution. Consequently, this leads to an increase in the concentration of \(\mathrm{H}^{+}\). Therefore, the solution is acidic and its \(\mathrm{pH}\) is less than 7. So option (1) is correct.
314743
Which of the following salt solutions is highly acidic?
1 Ammonium acetate
2 Ammonium cyanide
3 Sodium chloride
4 Ammonium nitrate
Explanation:
\(\mathrm{NH}_{4} \mathrm{NO}_{3}\) is a salt of strong acid, \(\mathrm{HNO}_{3}\) and weak base, \(\mathrm{NH}_{4} \mathrm{OH}\). So highly acidic \(\mathrm{CH}_{3} \mathrm{COONH}_{4}, \mathrm{NH}_{4} \mathrm{CN}\)-almost neutral (WAWB salts) \(\mathrm{NaCl}\) (SA-SB salt), neutral
MHTCET - 2021
CHXI07:EQUILIBRIUM
314716
The order of \(\mathrm{pH}\) of \(0.2 \mathrm{M}\) solutions of \(\mathrm{NH}_{4} \mathrm{NO}_{3}\), \(\mathrm{NaNO}_{3}\) and \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is :
\(\mathrm {\mathrm{NH}_{4} \mathrm{NO}_{3}}\) solution is acidic as it is salt of weak base and strong acid. \(\mathrm {\mathrm{NaNO}_{3}}\) solution is neural as it is salt of strong acid and strong base \(\mathrm {\mathrm{Na}_{2} \mathrm{CO}_{3}}\) solution is alkaline as it is salt of strong base and weak acid.
CHXI07:EQUILIBRIUM
314717
The \(\mathrm{pK}_{\mathrm{b}}\) of dimethylamine and \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid are 3.27 and 4.77 respectively at \({\text{TK}}\). The correct option for the \(\mathrm{pH}\) of dimethylammonium acetate solution is :
314718
Assertion : \(\mathrm{pH}\) of ammonium chloride solution is less than 7. Reason : Solution of a salt of weak base and strong acid is acidic.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Ammonium chloride is formed by the reaction of ammonia \(\left(\mathrm{NH}_{3}\right)\), a weak base, with hydrochloric acid \((\mathrm{HCl})\), a strong acid. The presence of the strong acid \((\mathrm{HCl})\) in this salt means it can readily furnish more \(\mathrm{H}^{+}\)ions to the solution. Consequently, this leads to an increase in the concentration of \(\mathrm{H}^{+}\). Therefore, the solution is acidic and its \(\mathrm{pH}\) is less than 7. So option (1) is correct.
314743
Which of the following salt solutions is highly acidic?
1 Ammonium acetate
2 Ammonium cyanide
3 Sodium chloride
4 Ammonium nitrate
Explanation:
\(\mathrm{NH}_{4} \mathrm{NO}_{3}\) is a salt of strong acid, \(\mathrm{HNO}_{3}\) and weak base, \(\mathrm{NH}_{4} \mathrm{OH}\). So highly acidic \(\mathrm{CH}_{3} \mathrm{COONH}_{4}, \mathrm{NH}_{4} \mathrm{CN}\)-almost neutral (WAWB salts) \(\mathrm{NaCl}\) (SA-SB salt), neutral
MHTCET - 2021
CHXI07:EQUILIBRIUM
314716
The order of \(\mathrm{pH}\) of \(0.2 \mathrm{M}\) solutions of \(\mathrm{NH}_{4} \mathrm{NO}_{3}\), \(\mathrm{NaNO}_{3}\) and \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is :
\(\mathrm {\mathrm{NH}_{4} \mathrm{NO}_{3}}\) solution is acidic as it is salt of weak base and strong acid. \(\mathrm {\mathrm{NaNO}_{3}}\) solution is neural as it is salt of strong acid and strong base \(\mathrm {\mathrm{Na}_{2} \mathrm{CO}_{3}}\) solution is alkaline as it is salt of strong base and weak acid.
CHXI07:EQUILIBRIUM
314717
The \(\mathrm{pK}_{\mathrm{b}}\) of dimethylamine and \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid are 3.27 and 4.77 respectively at \({\text{TK}}\). The correct option for the \(\mathrm{pH}\) of dimethylammonium acetate solution is :
314718
Assertion : \(\mathrm{pH}\) of ammonium chloride solution is less than 7. Reason : Solution of a salt of weak base and strong acid is acidic.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Ammonium chloride is formed by the reaction of ammonia \(\left(\mathrm{NH}_{3}\right)\), a weak base, with hydrochloric acid \((\mathrm{HCl})\), a strong acid. The presence of the strong acid \((\mathrm{HCl})\) in this salt means it can readily furnish more \(\mathrm{H}^{+}\)ions to the solution. Consequently, this leads to an increase in the concentration of \(\mathrm{H}^{+}\). Therefore, the solution is acidic and its \(\mathrm{pH}\) is less than 7. So option (1) is correct.
314743
Which of the following salt solutions is highly acidic?
1 Ammonium acetate
2 Ammonium cyanide
3 Sodium chloride
4 Ammonium nitrate
Explanation:
\(\mathrm{NH}_{4} \mathrm{NO}_{3}\) is a salt of strong acid, \(\mathrm{HNO}_{3}\) and weak base, \(\mathrm{NH}_{4} \mathrm{OH}\). So highly acidic \(\mathrm{CH}_{3} \mathrm{COONH}_{4}, \mathrm{NH}_{4} \mathrm{CN}\)-almost neutral (WAWB salts) \(\mathrm{NaCl}\) (SA-SB salt), neutral
MHTCET - 2021
CHXI07:EQUILIBRIUM
314716
The order of \(\mathrm{pH}\) of \(0.2 \mathrm{M}\) solutions of \(\mathrm{NH}_{4} \mathrm{NO}_{3}\), \(\mathrm{NaNO}_{3}\) and \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is :
\(\mathrm {\mathrm{NH}_{4} \mathrm{NO}_{3}}\) solution is acidic as it is salt of weak base and strong acid. \(\mathrm {\mathrm{NaNO}_{3}}\) solution is neural as it is salt of strong acid and strong base \(\mathrm {\mathrm{Na}_{2} \mathrm{CO}_{3}}\) solution is alkaline as it is salt of strong base and weak acid.
CHXI07:EQUILIBRIUM
314717
The \(\mathrm{pK}_{\mathrm{b}}\) of dimethylamine and \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid are 3.27 and 4.77 respectively at \({\text{TK}}\). The correct option for the \(\mathrm{pH}\) of dimethylammonium acetate solution is :
314718
Assertion : \(\mathrm{pH}\) of ammonium chloride solution is less than 7. Reason : Solution of a salt of weak base and strong acid is acidic.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Ammonium chloride is formed by the reaction of ammonia \(\left(\mathrm{NH}_{3}\right)\), a weak base, with hydrochloric acid \((\mathrm{HCl})\), a strong acid. The presence of the strong acid \((\mathrm{HCl})\) in this salt means it can readily furnish more \(\mathrm{H}^{+}\)ions to the solution. Consequently, this leads to an increase in the concentration of \(\mathrm{H}^{+}\). Therefore, the solution is acidic and its \(\mathrm{pH}\) is less than 7. So option (1) is correct.
