INORGANIC CHEMISTRY, PERIODIC TABLE, TRANSITION METALS and Others
Multiple Choice Quiz on Inorganic Chemistry, Periodic Table, Transition Metals and Others
Choose the answer that you think is right and then check it. Of course you may consult a Periodic Table, solubility table and the reduction potential table.
As atomic number increases across a period, which one of the following generally decreases?
number of valence electrons
atomic radius
first ionisation energy
atomic mass
An element 'X' forms chlorides XCl2, XCl3 and XCl4. Which one of the following is X?
Ga
C
Sr
Ti
Which one of the following best describes, for the elements across the third row of the periodic table: the trends in the first ionisation energy and acidity of the oxides?
Going from left to right: the first ionisation energy increases; and the acidity of the oxides increases while their basicity decreases
Going from left to right: the first ionisation energy increases; and the acidity of the oxides decreases while their basicity increases
Going from left to right: the first ionisation energy decreases; and the acidity of the oxides decreases while their basicity increases
Going from left to right: the first ionisation energy decreases; and the acidity of the oxides increases while their basicity decreases
An element reacts vigorously with cold water to produce hydrogen. It forms colourless ions and its salts are all soluble. Which of the following is the most likely identity of the element?
Mg
Cu
K
Fe
In the extraction of aluminium from bauxite, cryolite (Na3AlF6) is added during one of the steps. What is the main purpose of cryolite?
To provide a source of aluminium in the elctrolysis step
To act as a solvent and therefore depress the melting point of alumina
To act as a solvent to dissolve the alumina in preference to impurities in the bauxite ore
To act as seed crystals for the precipitation of alumina from a concentrated solution
100g of mineral water was found to contain 0.00584g of NaCl. What is the concentration of NaCl in parts per million by mass?
5.84
584
1.00
58.4
Which of the following does not occur in the blast furnace production of iron?
CaCO3 => CaO + CO2
Fe3O4 + 4 H2 => 3 Fe + 4 H2O
Fe2O3 + 3 CO => 2Fe + 3 CO2
CaO + SiO2 => CaSiO3
The concentration of Mg2+ in sea water is approximately 0.05 mol L-1. Which one of the following ions could not be present at a significant concentration?
SO42-
K+
CO32-
Cl-
Which one of the following statements about the trends down group IV in the Periodic Table is false?
Metallic character increases
The oxides become more basic
The electronegativity increases
The first ionisation energy decreases
A chemist wishes to make a fertiliser solution containing ions that will act as a source of nitrogen, phosphorus and potassium. Which one of the following mixtures of solids will completely dissolve to give such a solution?
K3PO4
Ca(NO3)2
KCl
NH4Cl
K3PO4
CaCl2
K2CO3
K3PO4
Ba(NO3)2
NH4NO3
Na3PO4
KCl
Which best describes how the periodic table is ordered?
The masses of the atoms
The acidities of the oxides
The atomic numbers of the elements
The ionisation energies of the elements
Which of the following metals exhibit variable oxidation states in compounds?
I
Iron
II
Lead
III
Magnesium
IV
Manganese
I, II and IV only
II and IV only
I and III only
I and IV only
Gold is produced by the CIP (Carbon in pulp) process and not in a blast furnace. Which of the following best accounts for this?
Gold cannot form alloys (as iron forms steel in the blast furnace)
Gold is found naturally in the elemental state
Gold will not melt at the temperature of a blast furnace
Gold oxide cannot be reduced by carbon (coke)
Which one of the following is not a property of iron?
It reacts with moist air to fom a porous oxide layer
It displaces copper ions from solution
It reacts with dilute hydrochloric acid to produce hydrogen gas
It reacts with sodium hydroxide solution to form iron hydroxide
Which one of the following statements about the first row of transition metals is false?
Many form coloured compounds
Many form compounds where the element has an incompletely filled subshell
They are all oxidising agents
The element can have a range of possible oxidation states in its compounds
Which one of the following statements is true?
Ga, Ti and V can form all of the chlorides XCl2, XCl3 and XCl4.
Ga can not form all the chlorides XCl2, XCl3 and XCl4.
Ti can not form all the chlorides XCl2, XCl3 and XCl4.
V can not form all the chlorides XCl2, XCl3 and XCl4.
Aluminium is produced by electrolytic reduction of alumina and not in a blast furnace. Which one of the following best accounts for this?
Aluminium is a highly reactive element
Cryolite could not be used in a blast furnace
Electricity is a cheap option
The reaction of bauxite with coke in a blast furnace is too vigorous
In the producion of alumina, bauxite is treated with hot sodium hydroxide solution. Subsequently, purified aluminium hydroxide is precipitated. Which of the following is essential for precipitation to occur?
Addition of acid to neutralise the NaOH
Cooling the solution, causing it to become supersaturated
Filtering off insoluble impurities
The addition of seed crystals
Which one of the following is the formula of the complex ion formed between one silver ion and two cyanide ions?
[Ag(CN)2]+
[Ag(CN)2]2+
[Ag(CN)2]-
[Ag(CN)2]2-
Which one of the following statements about the Group I elements is false?
The oxides are all basic
The ions have the electronic configuration of a noble gas
The first ionisation energy increases down the group
Chemical reactivity increases down the group
If a solution contains 1.35 x 10-3 mol L-1 of NaCl, what is the concentration in ppm of Na+? (Assume the density of the solution is 1.00 g mL-1)
1350 ppm
78.9 ppm
31.0 ppm
47.9 ppm
In a sample of ground water, iron in the form of Fe2+ was found to have a concentration of 9.00 x 10-3 mol L-1. Assuming the density of the water sample is 1.00 g mL-1, what is the concentration of Fe2+ expressed in ppm?