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36. Which of the following salt when dissolved in distilled water will give pH less than 7? (NTSE Punjab, Stage-I, 2015-16)
Na2S04
CH3COONa
(NH4)2S04
NaCI
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37. Match the following correctly (a) Washing soda (i) Hygroscopic substance (b) Sulphuric Acid (ii) Have water of crystallization (c) Suspension (iii) Coagulation takes place on addition of salt (d) Colloid (iv) Particles settle down on standing (NTSE Punjab, Stage-I, 2015-16)
(a)-(i), (b )-(ii), (c)-(iii), (d)-(iv)
(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
(a)-(ii), (b)-(iv), (cHi), (d)-(iii)
38. The chemical formula of baking soda is (NTSE Uttar Pradesh, Stage-I, 2015-16)
NaHC03
Na2C03
CaOCI2
CaS04
39. A solution turns red litmus into blue, its pH is likely to be (NTSE Uttar Pradesh, Stage-I, 2015-16)
1
4
5
10
40. Which one of the following is not an acidic salt? (NTSE Uttar Pradesh, Stage-I, 2015-16)
NaHS04
NaH2P04
Na3P04
Na2HP02
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