Reason (R): An acidic shield include a failing acid in addition to salt out-of weakened acidic with good ft

Question 1cuatro. Assertion(A): A mixture of CH_{step 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.

Matter fifteen. Assertion(A): Shield mix is the one whoever pH stays ongoing also by addition away from strong acidic or solid feet. Reason (R): To withstand alterations in the pH to your introduction out-of an enthusiastic acidic otherwise ft, this new buffer service is to include both acidic plus very first portion in order to neutralise the end result out-of additional acidic or base. (a) One another An excellent and you may R is proper and you will Roentgen ‘s the proper factor out-of An effective (b) Both Good and R was wrong (c) Good is right but R was completely wrong (d) Good was completely wrong but Roentgen is right Answer: (a) One another A and you can Roentgen is best and you will Roentgen is the right cause out of An effective

Matter dos

(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 Mesquite escort. (a) HClO₄ (b) HCI (c) HSO₄ (d) H₂SO₄ Answer: (c) HSO₄. Reason: HSO₄ is a very weak base whereas 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 eleven. (a) Cooking soda (b) Tomato (c) Soap and water (d) Drain vacuum cleaner Address: (b) Tomato Cause: Tomato has actually pH below 7 and is also acid while anybody else features pH more than 7 and they are earliest.

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

Matter 4. (a) Orange, Black java (b) Baking soda,, H2o (c) Ammonia, Gastric acid (d) Whiten , Tomato Answer: (a) Orange , Black coffee

1. Acid needs bad, transforms new blue litmus to red-colored and you can reacts having precious metals such as while the zinc and you may produces hydrogen gas.
2. Ft choices bad, turns this new purple litmus so you can blue and you may soapy to touch.

Give an explanation for Arrhenius concept of acid and you may base that have example. Answer: step one. Centered on Arrhenius layout, an acidic are a substance one to dissociates to give hydrogen ions within the water. Eg,

Concern step three. What are the limits off Arrhenius style? Answer: 1. Arrhenius idea will not give an explanation for habits out-of acids and you can legs when you look at the non-aqueous solvents eg acetone, tetrahydro furan.