Answers Which of the following sets of metals dissolves in dilute HCl? Which of the following sets of metals dissolves in dilute HCl? A. Fe, Sn and Cu B. Mg,… Read More
Answers If chlorine is bubbled into water and the resulting yellowish-green solution is exposed to bright… If chlorine is bubbled into water and the resulting yellowish-green solution is exposed to bright sunlight for a… Read More
Answers The tincture of iodine means iodine dissolved in The tincture of iodine means iodine dissolved in A. ethanol B. bromine chloride C. chlorine water D. water… Read More
Answers Cu2+(aq) + 4NH3(g) ↔ [Cu(NH3)4]2+(aq) In the reaction above, what is the effect of precipitating… Cu2+(aq) + 4NH3(g) ↔ [Cu(NH3)4]2+(aq) In the reaction above, what is the effect of precipitating Cu2+(aq) as CuS(s)?… Read More
Answers Copper and silver metals are commonly use as coin because they are Copper and silver metals are commonly use as coin because they are A. easily reduced B. not easily… Read More
Answers The reddish-brown rust on iron roofing sheets consists of The reddish-brown rust on iron roofing sheets consists of A. Fe3+(H2O)6 B. FeO.H2O C. Fe2O3.3H2O D. Fe3O4.2H2O Correct… Read More
Answers Na2S2O3(aq) + 2HCl(aq) → 2NaCl(aq) + H2O(l) Which of the following would introduce the greatest… Na2S2O3(aq) + 2HCl(aq) → 2NaCl(aq) + H2O(l) Which of the following would introduce the greatest increase in the… Read More
Answers A solution which on treatment with hydrochloric acid produces a colourless, odourless gas which turns… A solution which on treatment with hydrochloric acid produces a colourless, odourless gas which turns lime water milky… Read More
Answers The soft solder used for welding and plumbing is alloy of The soft solder used for welding and plumbing is alloy of A. lead and tin B. iron and… Read More
Answers An element used in the production of matches is An element used in the production of matches is A. nitrogen B. aluminium C. copper D. sulphur Correct… Read More