Question
SOLVE IT
The complete change in indicator color occurs over a range of: 1.0 pH unit 7.0 pH units 14.0 pH units 4.0 pH units 2.0 pH units The corrosion of iron will be the highest in the case of one of following conditions: Iron immersed in water Iron exposed only to dry air Iron immersed in oxygenated water Iron exposed to an inert N2 atmosphere None Reaction between sodium hydroxide and sulphuric acid is: Exothermic Neutral Endothermic Acidic None Mixing of two gases in a container is called: Effusion Diffusion Osmosis Dispersion None To keep your coffee hot it is preferable to put it in Open bottle Closed took Isolated bottle Adiabatic bottle None 25 ml of 0.1 M NaOH (M wt: 40 g.mol) were mixed With 125 ml 0.1 M HCL (M wt 36.5 g/mol), the pH of the mixed solution is : 1.50 1.20 1.18 1.20 None
Explanation / Answer
26 ...c) 14 pH units
27...c) iron immersed in oxygeneted water
28....b) neutral reaction
29...b) diffusion
30...d) adiabatic bottle
31...d
