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.
Concern 15. Assertion(A): Barrier mixture is one whose pH stays lingering actually by addition from solid acidic or solid foot. Cause (R): To resist alterations in http://datingranking.net/escort-directory/long-beach/ their pH to your introduction of an enthusiastic acid otherwise feet, the latest barrier service is to incorporate both acid along with first areas in order to neutralise the effect out-of added acid or base. (a) Both An effective and you can Roentgen are right and Roentgen ‘s the best reason away from Good (b) Both A great and you will R are wrong (c) An effective is right but Roentgen are wrong (d) A good are wrong however, Roentgen is right Respond to: (a) Both A beneficial and you may R are right and R ‘s the right explanation regarding Good
Concern 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) HNO3 3COOH 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.
Question eleven. (a) Cooking soft drink (b) Tomato (c) Soap and water (d) Sink vacuum Address: (b) Tomato Reason: Tomato features pH below eight and is acid while other people possess pH higher than 7 as they are 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.
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) Orange, Black colored coffees (b) Cooking soda,, Drinking water (c) Ammonia, Gastric acid (d) Whiten , Tomato Answer: (a) Lime , Black colored coffees
Explain the Arrhenius concept of acidic and you may feet with analogy. Answer: 1. Predicated on Arrhenius design, an acidic is actually a compound you to definitely dissociates to give hydrogen ions within the water. Such as for example,
Matter step 3. Which are the constraints of Arrhenius layout? Answer: step 1. Arrhenius idea cannot explain the actions from acids and foot from inside the non-aqueous solvents instance acetone, tetrahydro furan.