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


This Game Will Let You Understand More About Qualitative Analysis, Preparation Of Salts, Chemical Bonding And Atomic Structure. TEACHERS: click here for quick copy question ID numbers.

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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