Cause (R): An acidic shield contains a failure acidic and salt of weak acid having strong feet

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 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): Barrier mixture is just one whoever pH remains ongoing actually of the addition off strong acidic otherwise good feet. Reason (R): To withstand alterations in its pH on the introduction out-of a keen acid or base, the latest shield solution will be include one another acidic as well as earliest areas to be able to neutralise the end result out-of additional acid otherwise foot. (a) Both An effective and you can R are best and you may R ‘s the right need out-of A great (b) Each other A good and R was incorrect (c) A great is correct but R is actually completely wrong (d) An effective is actually incorrect but R is correct Respond to: (a) Each other A good and you will Roentgen was right and R ‘s the proper explanation from A great

Question 2

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(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 eleven. (a) Cooking soft drink (b) Tomato (c) Soapy water (d) Drain vacuum Address: (b) Tomato Cause: Tomato has actually pH less than eight and it is acidic whereas other people enjoys pH more than eight and so 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

Question cuatro. (a) Orange, Black colored java (b) Cooking soda,, Liquid (c) Ammonia, Stomach acid (d) Bleach , Tomato Respond to: (a) Lime , Black coffee

1. Acidic choices bad, turns the newest blue litmus to help you reddish and responds that have gold and silver coins such as while the zinc and you can produces hydrogen gasoline.
2. Ft preferences sour, transforms the fresh new purple litmus so you’re able to bluish and soapy to the touch.

Explain the Arrhenius concept of acid and ft that have analogy. Answer: step 1. Predicated on Arrhenius concept, an acidic try a substance you to dissociates provide hydrogen ions in the water. Including,

Matter step 3. Exactly what are the limits off Arrhenius style? Answer: step 1. Arrhenius theory doesn’t explain the actions regarding acids and you may foot in non-aqueous solvents for example acetone, tetrahydro furan.