Need (R): An acidic boundary includes a weak acidic additionally the salt from weak acidic that have good base

Question 1cuatro. Assertion(A): A mixture of CH₃COOH 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 15. Assertion(A): Barrier blend is just one whose pH remains constant even from the addition from good acid otherwise solid feet. Reasoning (R): To resist changes in its pH on the introduction out-of an acidic or feet, the barrier service is to incorporate both acidic including very first portion in order to neutralise the effect of extra acidic otherwise base. (a) One another An effective and you will R is best and you may Roentgen ‘s the correct factor regarding An excellent (b) Both An excellent and R is completely wrong (c) An excellent is correct but Roentgen are wrong (d) Good are incorrect however, Roentgen is right Answer: (a) Both A and you will R was right and you may R ‘s the correct reason away from A

Question 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.

Matter 11. (a) Baking soft drink (b) Tomato (c) Soapy water (d) Drain cleaner Respond to: (b) Tomato Reason: Tomato keeps pH below 7 and is acidic whereas other people has actually pH more than seven and are usually very first.

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 coffees (b) Cooking soda,, Liquids (c) Ammonia, Stomach acid (d) Whiten , Tomato Answer: (a) Lime , Black java

1. Acidic needs bad, converts the brand https://datingranking.net/escort-directory/murfreesboro/ new bluish litmus so you’re able to reddish and reacts that have metals like because the zinc and supplies hydrogen gasoline.
2. Legs choices bad, turns the yellow litmus to blue and you may soapy to the touch.

Give an explanation for Arrhenius notion of acid and you may legs having analogy. Answer: 1. Considering Arrhenius design, an acid was a material one to dissociates giving hydrogen ions in the water. Such,

Question 3. Do you know the restrictions out-of Arrhenius concept? Answer: step 1. Arrhenius concept doesn’t give an explanation for conduct of acids and you can base during the non-aqueous solvents such as for instance acetone, tetrahydro furan.