WorksheetsSECTION A Part 2 (A5,A6 and A7)
Total questions: 21
Worksheet time: 31mins
When aqueous silver nitrate is added to an aqueous solution of magnesium chloride, a white precipitate forms. The ionic equation for the formation of this precipitate is:
Mg+ (aq) + NO3-(aq) = MgNO3 (s)
Ag2+(aq) + 2Cl-(aq) = AgCl2(s)
Mg2+(aq) + 2NO3-(aq) = Mg(NO3)2(s)
Ag+(aq) + Cl-(aq) = AgCl(s)
The high melting point of ionic compounds may be due to the
arrangement of ions
large number of ions
attraction among ions
movement of ions
Which of the following statements about chemical reactions is NOT correct?
Energy given out when bonds break and taken in when bonds form
Chemical reactions involve the making and breaking bonds
Endothermic reactions take energy from surroundings
Exothermic reactions give energy to the surroundings.
Graphite can be used as a lubricant because of
strong attraction between the hexagonal layers of carbon atoms
weak attraction between the hexagonal layers of carbon atoms
the loose electrons which can move throughout the lattice
strong attraction within the hexagonal layers of carbon atoms
Which of the following compounds does NOT consist of individual molecules?
ethane
ethanol
hydrogen chloride
sodium chloride
Which of the following salts are soluble in water?
I. ammonium carbonate.
II. barium sulfate.
III. lead nitrate.
I and II only
I and III only
II and III only
I, II and III
Which of the following statements would be correct if diamond and graphite are allotropes?
I. Both can be represented by the symbol C.
II. Both have a relative atomic mass equal to that of carbon.
III. They have similar physical properties.
I and II only
I and III only
II and III only
I, II and III
Which of the following quantities of acid can exactly neutralise 40cm3 of 2 moldm-3 sodium hydroxide?
I. 10 cm3 of 2.0moldm-3 hydrochloric acid
II. 10 cm3 of 4.0 moldm-3 sulfuric acid.
III. 20 cm3 of 4.0 moldm-3 nitric acid.
I only
II only
II and III only
I and II only
Which of the following quantities of acid can exactly neutralise 20cm3 of 2 moldm-3 sodium hydroxide?
I. 10 cm3 of 4.0moldm-3 hydrochloric acid
II. 10 cm3 of 2.0 moldm-3 sulfuric acid.
III. 20 cm3 of 4.0 moldm-3 nitric acid.
I only
II only
II and III only
I and II only
Which TWO of the following statements about covalent compound are true?
I. They are mainly solid.
II. They usually have low melting and boiling points.
III. They are usually insoluble in water.
IV. They contain only ions.
I and III
I and IV
II and III
II and IV
An ion with a single negative charge may be converted into a neutral atom of the same element by
losing an electron
gaining an electron
gaining a proton
losing a neutron
RCOOH (aq) + NaOH (aq) --> RCOONa (aq) + H2O (l)
Which of the following processes correctly describes the reaction above?
Precipitation
Neutralization
Reduction
Decomposition
"Ionic bond formation" is BEST described as the result of the
sharing of electrons between the atoms of a metal and non-metal to achieve stability
donation of electrons from a metal to a non-metal to achieve stability
donation of electrons from a non-metal to achieve stability
attraction between the positively charged ions of a metal and a pool of electrons
If atom X forms an ion, the charge on the ion would MOST likely be
5+
5-
3+
3-
The values of x and y respectively in the equation below are:
x=5; y=6
x=6; y =5
x=6; y=6
x=5; y=5
How many covalent bonds are there in a nitrogen molecule?
3
4
2
1
Which of the following may be defined as that quantity of a substance which contains 6.02x1023 particles of that substance?
atom
mole
formula
molecule
Which of the following elements exhibits allotrophy?
carbon
uranium
butane
silicon
The layer-like arrangement of graphite and the weak bonds between the layers determine that graphite is:
colourless and transmit light
very hard with high density
greasy and used as a lubricant
a good conductor of electricity
The ionic equation between zinc and sulfuric acid can BEST be represented by
A
B
C
D
Which of the following diagrams BEST illustrates bonding of nitrogen?
