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31. Which metal cannot displace hydrogen from dilute acids? (NTSE Rajasthan, Stage-I, 2014-15)
Cu
Mg
Zn
Na
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32. Copper reacts with dilute nitric acid and liberates___________ (NTSE Tamil Nadu, Stage-I, 2014-15)
Nitrogen dioxide
Nitric oxide
Nitrogen pentoxide
Nitrous oxide
33. The constituent present in baking powder is (NTSE Tamil Nadu, Stage-I, 2014-15)
Sodium benzoate
Acetic acid
Sodium lactate
Tartaric acid
34. The pH of 0.1 M NaOH is (NTSE Tamil Nadu, Stage-I, 2014-15)
13
12
11
10
35. Which of the following represents the correct order of the acidic strength for equimolar aqueous solutions of HCI, H2S04, NH40H and NaOH (NTSE Stage-II,2013-14)
HCI < NH40H < NaOH < H2S04
NH40H < NaOH < H2S04 < HCI
HCI < H2S04 < NH40H < NaOH
NaOH < NH40H < HCI < H2S04
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