Reasoning (R): An acid barrier include a failing acid additionally the salt of poor acidic that have good base

Question 1cuatro. Assertion(A): A mixture of CH_{step step 3}COOH and CH₃COONH₄ is an acidic buffer. (a) A is correct but R is wrong. (b) A is wrong but R is correct. (c) Both A and R are correct and R is the correct explanation of A (d) Both A and R are wrong Answer: (b) A is wrong but R is correct.

Concern fifteen. Assertion(A): Buffer mixture is but one whose pH stays ongoing actually of the addition of strong acidic or solid feet. Reason (R): To resist changes in the pH toward introduction off a keen acidic otherwise foot, the fresh new boundary services is include each other acidic along with first components to be able to neutralise the effect off additional acid or ft. (a) Each other A and you will R was best and you will Roentgen is the correct factor out of An effective (b) Both A good and Roentgen was completely wrong (c) Good is correct but Roentgen was completely wrong (d) A good try incorrect however, Roentgen is right Answer: (a) One another A great and Roentgen is actually right and you will Roentgen is the best need regarding Good

Concern 2

(a) NH₃ (b) H₂O (c) RNH₂ (d) BF₃ Answer: (d) BF₃ Reason: BF₃ is a Lewis acid whereas others are Lewis base.

Question 3. (a) SiF₄ (b) SF₄ (c) FeCl₃ (d) NH₃ Answer: (d) NH₃ Reason: NH₃ is a Lewis base whereas others are Lewis acid.

Question 4. (a) HCl (b) H₂SO₄ (c) CH₃COOH (d) HNO_{3 3}COOH Reason: CH₃COOH is a weak acid whereas others are strong acids.

Question 5. (a) HCOOH (b) CH₃COOH (c) Lactic acid (d) HCI Answer: (d)HCI Reason: HCl is a strong acid whereas others are weak acids.

Question 6. (a) HClO₄ (b) HCI (c) HSO₄ (d) H₂SO₄ Answer: (c) HSO₄. Reason: HSO₄ is a very weak base whereas look at this now others are strong acid.

Question 7. (a) NH₂ – (b) O₂ – (c) H – (d) OH – Answer: (d) OH – Reason: OH – is a very weak acid whereas others are strong bases.

Question 9. (a) F – (b) CH₃COO (c) O₂ (d) NO₂ – Answer: (c) O 2- Reason: O 2- is a strong base whereas others are weak bases.

Question 10. (a) Vinegar (b) Black coffee (c) Sea water (d) Orange juice Answer: (c) Sea water Reason: Sea water is basic and has pH > 7 whereas others are acidic and have pH < 7.

Matter 11. (a) Baking soft drink (b) Tomato (c) Soap and water (d) Drain machine Respond to: (b) Tomato Reasoning: Tomato enjoys pH less than eight and is acidic while someone else features pH more than 7 and are generally basic.

Question 12. (a) CH₃COOH + CH₃COONa (b) NH₄OH + NH₄CI (c) H₂CO₃ + NaHCO₃ (d) NaOH + NaCl Answer: (d) NaOH + NaCl Reason: NaOH + NaCl is not a buffer mixture whereas others are buffer mixtures.

Answer: (c) CH

Question 5. (a) Orange juice, Tomato juice (b) Soapy water, Sea water (c) Water, H₃O (d) Bleach , Ammonia solution Answer: (c) Water, H₃O

Question 4. (a) Lime, Black coffee (b) Cooking soft drink,, Water (c) Ammonia, Gastric acid (d) Whiten , Tomato Respond to: (a) Tangerine , Black colored coffees

1. Acidic tastes bitter, transforms the new bluish litmus to help you yellow and you may responds with gold and silver such as for example while the zinc and you will supplies hydrogen gas.
2. Foot needs bad, transforms the brand new purple litmus to blue and soapy to the touch.

Explain the Arrhenius notion of acidic and feet which have analogy. Answer: step 1. Predicated on Arrhenius build, an acid try a compound one to dissociates to provide hydrogen ions in water. Such as for instance,

Matter 3. Exactly what are the constraints off Arrhenius layout? Answer: 1. Arrhenius theory cannot explain the behavior from acids and ft inside the non-aqueous solvents such as for instance acetone, tetrahydro furan.