Choose the correct option
(i) In lemon juice
(a) H+
ions are more, OH–
ions are less
(b) H+
ions are less, OH–
ions are more
(c) H+
ions and OH–
ions are equal
(d) Only H+
ions are present
(ii) When an acid reacts with a metal carbonate then we get-
(a) Salt and water
(b) Salt and water and carbon dioxide
(c) Salt and sulphur dioxide
(d) Salt and hydrochloric acid are
(iii) Which among the following is not a strong acid
(a) HCl (b) HNO3
(c) CH3COOH (d) H2SO4
(iv) The pH of a neutral solution is
(a) 1 (b) 0
(c) 14 (d) 7
(v) Sakina has a burning sensation in her stomach due to acidity; she needs
(a) A strong acid (b) A strong base
(c) A weak base (d) A weak acid
(vi) The cause of tooth decay is pH of saliva
(a) Being less than 6.5 (b) Becoming 7
(c) Being less than 5.5 (d) Being more than 6.5
(vii) Which of the following salts is acidic in nature
(a) NaCl (b) Na2SO4
(c) NH4Cl (d) KNO3
Answers
Answered by
7
1) should be A as lemon juice is majorly acid and may have traces of water, its more H+ and lesser OH-.
2) should be B . Example : HCl + Na2CO3 --> NaCl + CO2 + H2O
3) should be C. Organic acids are generally very weak relative to mineral acids.
4) should be D. pH of neutral solution on normal scale is 7 which is balanced H+ and OH- ion concentration.
5) should be B. Strong bases like Mg(OH)2 - milk of magnesia helps for relief.
6) should be C. Mostly factual info.
7) should be C. It is a combination of a weak base and strong acid .
2) should be B . Example : HCl + Na2CO3 --> NaCl + CO2 + H2O
3) should be C. Organic acids are generally very weak relative to mineral acids.
4) should be D. pH of neutral solution on normal scale is 7 which is balanced H+ and OH- ion concentration.
5) should be B. Strong bases like Mg(OH)2 - milk of magnesia helps for relief.
6) should be C. Mostly factual info.
7) should be C. It is a combination of a weak base and strong acid .
Answered by
11
hey there,
(i) in lemon juice, H⁺ ions are more, OH⁻ ions are less.
option (a) is correct.
(ii) when an acid reacts with a metal carbonate, then we get salt + water + CO₂
eg:- Na₂CO₃ + 2HCl → 2NaCl + CO₂ + H₂O
option (b) is correct.
(iii) CH₃COOH is not a strong acid. it is a weak acid.
option (c) is correct.
(iv) pH of a neutral acid is 7.
option (d) is correct.
(v) she needs a strong base. eg:- Mg(OH)₂.
option (b) is correct.
(vi) pH of saliva being less than 5.5.
option (c) is correct.
(vii) NH₄Cl is acidic in nature.
option (c) is correct.
hope it helps..
(i) in lemon juice, H⁺ ions are more, OH⁻ ions are less.
option (a) is correct.
(ii) when an acid reacts with a metal carbonate, then we get salt + water + CO₂
eg:- Na₂CO₃ + 2HCl → 2NaCl + CO₂ + H₂O
option (b) is correct.
(iii) CH₃COOH is not a strong acid. it is a weak acid.
option (c) is correct.
(iv) pH of a neutral acid is 7.
option (d) is correct.
(v) she needs a strong base. eg:- Mg(OH)₂.
option (b) is correct.
(vi) pH of saliva being less than 5.5.
option (c) is correct.
(vii) NH₄Cl is acidic in nature.
option (c) is correct.
hope it helps..
Similar questions