Ready For Sec3 Chemistry?: Question Preview (ID: 3930)

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Insoluble base-acid reaction forms...
a) Salt, Carbon Dioxide and water b) Salt and water c) Salt, Ammonia and water d) Salt and hydrogen
Heating to saturation, cooling and filtering is called...
a) filtration b) evaporation to dryness c) heat forcing d) crystallisation
Which of the following salts is prepared by titration?
a) magnesium nitrate b) potassium chloride c) iron(III) nitrate d) zine carbonate
Which of the following is not a property of alkalis?
a) Sour b) Soapy c) turn color of universal indicator d) reacts with ammonium salts to form ammonia gas, water and salt
Which combustion equation is balanced?
a) 2C2H6 + 4O2 в†’ 3CO2 + 10H2O b) 3C2H6 + 10O2 в†’ 10H2O + 2CO2 c) 2C2H6 + 7O2 в†’ 3CO2 + 6H2O d) 8C2H6 + 8O2 в†’ 8CO2 +8H2O
What is the elctronic configuration of Al?
a) 1s2 2s2 2p6 3s2 3p2 b) 1s2 2s2 2p6 3s2 3p1 c) 1s2 2s2 2p6 3s2 3p4 d) 1s2 2s2 2p6 3s2 3p3
What is the elctronic configuration of N?
a) 1s2 2s2 2p3 b) 1s2 2s2 2p4 c) 1s2 2s2 2p5 d) 1s2 2s2 2p6
An atom with electronic configuration 1s2 2s2 2p6 3s2 3p5 is
a) group 5 period 3 b) group 2 period 3 c) group 7 period 3 d) group 3 period 7
It is impossible to directly react an insoluble compound to prepare an insoluble salt as a/an _______ would be formed around the compound, preventing further reaction.
a) block b) cap c) cover d) coating
To remove water from soil and sand, we can use
a) crystallisation b) filtration c) chromatography d) fractional distillation
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