NEW
Font size
WorksheetsSS3/GRADE12 - CHEMISTRY
Total questions: 20
Worksheet time: 12mins
Straight and branched chain organic compounds are
aromatic
aliphatic
alicyclic
heterocyclic
The atoms 4020A and 41xB are isotopes of the same element. The value of x in atom B is
41
40
21
20
Which of the following statements is correct when a mixture of sodium chloride and ammonium chloride is heated?
Ammonium chloride sublimes
Both compounds melt
Sodium chloride fuses
Sodium chloride melts
Which of the following conditions would lead to increase in the rate of reaction?
increase in temperature and decrease in the surface area of reactants
increase in both temperature and concentration of reactants
decrease in temperature and increase in concentration of reactants
decrease in temperature and increase in the surface area of reactants
The element with electron configuration 1s22s22p63s2 is
a metal
a non - metal
a halogen
an inert gas
Which of the following alkanols would produce only one type of alkene on dehydration?
CH3CH2CH(OH)CH3
CH3C(CH3)(OH)CH3
CH3CH(OH) CH3
CH3CH2CH2OH
Which of the following compounds in aqueous solution is neutral to litmus?
KHCO3
Na2CO3
FeCl3
NaCl
The IUPAC name for CH3C(CH3)CH2 is
2- methylbutene
2 - methylprop-2 - ene
2 - methylpropene
but - 1 - ene
Manganese(IV)oxide is known to hasten the decomposition of hydrogen peroxide. Its main action is to
lower the activation energy of the reaction
increase the surface area of the reactants
lower the heat of reaction
increase the concentration of the reactants
How many moles of AgNO3 are there in 550cm3 of 0.01mol/dm3 AgNO3 solution?
5.5000
0.5500
0.0550
0.0055
One mole of a hydrocarbon which contains 36g of carbon has a vapour density of 22. What is its molecular formula? (H = 1. C= 12)
C4H8
C3H4
C3H8
C3H6
The by - product in soap prepared traditionally is
glycerol
caustic soda
salt
oil
What make(s) up most of the volume of an atom?
Protons
Neutrons
Electrons
Empty space
Which of the following substances are held together by van der waal's forces?
H2O(l)
CO2(g)
CaO(s)
SiO2(s)
On addition of barium chloride solution and dilute hydrochloric acid, a white precipitate was formed by
CO32-(aq)
NO3-(aq)
SO32-(aq)
SO42-(aq)
A biodegradeable pollutant is
plastic
sewage
carbon(II) oxide
hydrogen sulphide
Consider the following reactivity series:
K, Na, M, Al, Zn, Fe, Pb, Cu, Ag. M can be extracted from its ore by
electrolysis of its molten oxide
electrolysis of its aqueous sulphate
reduction of its oxide by heating with coke
reduction of its oxide by heating with hydrogen
An element X is represented as 73X. Which of the following statements is correct?
It is in group III of the periodic table
It is in the group VII of the periodic table
The total number of protons and electrons is 6
The total number of protons and neutrons is 10
Which of the following alkanes has exactly three structural isomers?
C2H6
C3H8
C4H10
C5H12
If 10cm3 of 2.0 mol/dm3 sodium hydroxide is diluted to 200cm3, what would the concentration of the diluted solution be?
0.05 mold/dm3
0.06 mol/dm3
0.08 mol/dm3
0.10 mol/dm3
