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Syllabus
(a) Na2CO3 (b) CH3COOH
(c) CH3COONH4 (d) K2SO4
25. Which of the following acts as both Bronsted and Lewis acid?
(a) Cu+2 (b) SO2
(c) Fe+3 (d) NH4+
Carbonic acid gives an acid salt but hydrochloric acid does not.
In this question I was told to write the answer in terms of basicity( monobasic , dibasic, etc.).....if I write it in terms of partial replacement will the answer be wrong ??
(A)
(B)
(C)
(D)
(a) will liberate ammonia from ammonium sulphate on heating?
(b) is a strong acid?
(c) contains molecules as well as ions?
dry HCL gas does not affect a try strip of blue litmus paper but it turns red in the presence of a drop of water.
44. The pH value of human blood is 7.3. What would happen if the pH of his blood becomes 7.6?
45. Two solutions X and Y have pH values 3 and 9 respectively Which of these two give a pink colour with phenolphthalein?
a) Anhydrous
b)Effloresence
Please answer clearly and according to the question.
2. The unwanted material in an ore is known as
(i)
19. What happens when copper chloride reacts with an aqueous solution of sodium hydroxide? State the colour of the precipitate formed.
Q 1. Is the dam in this part of the map natural or artificial.Give reasons
64. Calculate the pH of a solution which contains 9.9 ml of 1 M HCI and 100 ml of 0.1 M NaOH.
65. Calculate the pH of a solution by mixing 0.1 litre of pH - 4 and 0.2 litre of pH = 10.
65. Calculate the pH of a solution obtained by mixing 10 ml of 0.1 M HCI and 40 ml of 0.2 M H2SO4-
Q.1. Name the following:
(a) A basic solution which does not contain a metallic element.
(b) An alkali which on dissociation produces a high concentration of hydroxyl ions.
(c) A complex salt solution used for testing a basic gas lighter than air.
(d) A base which reacts with hydrochloric acid to give a salt which on hydrolysis gives a slightly acidic solution.
(A) NO3- (B) CN- (C) NH3 (D) BF3
Please do not provide any link.
Q.28. State what will be the effect of each of the following solutions on blue litmus -
i] soln. ii] KCl soln. iii] soln.
(i) The exposure of barium to air.
(ii) The addition of barium to water.
(iii) The treatment of barium with dil. HCl.
25. In the reaction, I2 + I- I3-, the Lewis base is :-
(A) I2 (B) I-
(C) I3- (D) None.