Question 1cuatro. Assertion(A): A mixture of CH_{step step three}COOH and CH₃COONH₄ is an acidic buffer. (a) A is correct but R is wrong. (b) A is escort girl Indianapolis 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.

Question fifteen. Assertion(A): Barrier mix is the one whose pH stays constant actually because of the addition of good acid or good base. Reason (R): To resist alterations in its pH to the addition out of a keen acid or foot, the buffer services will be include both acidic as well as basic section to be able to neutralise the outcome of added acid otherwise feet. (a) Both A and you will R is actually right and you can Roentgen ‘s the correct reason away from A beneficial (b) Each other A beneficial and you can R was wrong (c) A beneficial is correct but Roentgen are incorrect (d) A is incorrect but R is right Answer: (a) Both A beneficial and you will R was proper and you may R ‘s the proper cause from A good

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. (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.

Concern 11. (a) Baking soda (b) Tomato (c) Soap and water (d) Drain vacuum cleaner Answer: (b) Tomato Reasoning: Tomato possess pH below eight and is acid whereas other people have pH higher than 7 and are 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

Concern cuatro. (a) Lime, Black coffees (b) Cooking soda,, H2o (c) Ammonia, Stomach acid (d) Bleach , Tomato Address: (a) Lime , Black colored coffees

1. Acidic needs bad, transforms brand new blue litmus so you can purple and you can reacts with precious metals particularly since zinc and you can produces hydrogen fuel.
2. Feet needs sour, turns the fresh new red-colored litmus so you’re able to bluish and you can soapy to touch.

Give an explanation for Arrhenius concept of acidic and feet that have example. Answer: 1. According to Arrhenius build, an acid are a material one dissociates provide hydrogen ions in the water. Particularly,

Concern 3. What are the constraints from Arrhenius build? Answer: step one. Arrhenius principle will not give an explanation for habits off acids and you will foot for the low-aqueous solvents eg acetone, tetrahydro furan.