WorksheetsScience Chemistry Quiz-2
Total questions: 25
Worksheet time: 19mins
Which of the following is NOT a part of the scientific method
Hypothesis
Observation
Educated guess
Solubility
A pizza with pepperoni, mushrooms, and green pepper is a...
Heterogenious
Homogenise
Herogenious
Bananagenious
The complete ionization of tetraoxosulphate(VI) acid produces
2H + SO4
H+ + SO32-
2H+ + SO42-
2H+ + SO32-
What is the formula of a compound formed when an element Y with atomic number 13 combines with another element Z with atomic number 8?
YZ2
YZ
Y3Z2
Y2Z3
The final product of the reaction between C2H5OH and concentrated H2SO4 at 1700C is
CH3CH2HSO4
CH2 = CH2
CH ≡ CH
(C2H5)2SO4
What mass in grams of copper would be deposited in a copper voltammeter if 5,000 C of electricity was passed? [Cu = 63.5, IF = 96500C]
5.00
3.35
2.50
1.65
During the extraction of sodium using Downs cell, the anode is a/an
steel cylinder
iron rod
iron lining of the container
graphite rod
The following are sourced from petroleum industry except
polyvinyl chloride
pitch
latex
ligroin
Water collected from rivers and ponds contain oxygen, carbon(IV) oxide and
sulphur(VI)oxide
nitrogen
hydrogen
helium
Which of the following compounds does not give oxygen gas on heating?
Zn(NO3)2
NaNO3
MnO2
KClO3
The following trioxocarbonate(IV) compounds are not affected by heat except
ZnCO3
Na2CO3
MgCO3
(NH4)2CO3
Sodium hydroxide solution was added to a solution of unknown salt X in a test tube, a blue precipitate was observed. The cation in the unknown salt X is
Na+
Fe3+
Fe2+
Cu2+
What is the relative molecular mass of calcium hydroxide? [Ca = 40, O = 16, H = 1]
74
63
57
37
The measure of the average kinetic energy of molecules of a gas is
density
mass
pressure
temperature
Alkaline hydrolysis of fats and oils produces soap and
propanol
propane - 1, 1, 3 - triol
propane - 1, 2, 3 - triol
propane - 2, 2 - diol
Who discovered Radium?
Alexander Fleming
Marie Curie
Alfred Nobel
John Wilson
Identify it.
(a)
