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WorksheetsGroup 14
Total questions: 10
Worksheet time: 20mins
A tetrachloride of Group 14, XCl4, has the following properties.
(i) It is easily hydrolysed.
(ii) It is unstable to heat.
(iii) It decomposes at room temperature according to the equation
XCl4 --> XCl2 + Cl2
X could be
germanium
silicon
lead
carbon
The oxide of an element Y releases chlorine gas when heated with concentrated hydrochloric acid. The oxide of Y could be
SnO
PbO
SnO2
PbO2
Which of the following is true about Group 14 elements?
All monoxide are covalent oxides
Form oxides with +2 and +4 oxidation states
All the oxides with +2 oxidation state are basic oxides
All the oxides with +2 oxidation state can react with NaOH
The diagram shows the structure of a type of silicate.
Which of the following statements is correct with regard to the above structure
It represents the structure of asbestos
The repeating unit is SiO44 – .
The structure is found in the mineral pyroxene.
The ratio of Si to O is 1: 4.
Which of the following about the dioxides of the Group 14 elements is not true?
None of the oxide is purely ionic
Only CO2 and SiO2 is acidic
All can react with aqueous sodium hydroxide
All are stable to heat
In the preparation of lead(IV) chloride from lead(IV) oxide and concentrated hydrochloric acid, the temperature must be about 2oC. This is
to prevent the mixture from boiling
because lead(IV) oxide is unstable at high temperatures
because concentrated hydrochloric acid will decompose to chlorine at higher temperatures
to prevent the decomposition of lead(IV) chloride
Which of the following is not true about chain silicates?
The repeating unit of a single-chain silicate is SiO32- ion.
In pyroxene, each SiO44- unit linked by sharing two oxygen atoms to form long linear chain.
Examples of chain silicates are mica and asbestos.
Amphibole is a double-chain silicate
The silicon compound consisting of the unit structure [Si4O11]6– is called
pyroxene
amphiboles
mica
kaolinite
Which of the following is not true?
Lead(IV) oxide is a white solid.
Beryllium chloride is covalent.
The boiling point of sulphur is higher than phosphorus.
Carbon dioxide is more stable than carbon monoxide.
Silicone is an inorganic polymer containing silicon. Silicone is used as
I water-proof raincoat
II lubricant
III electric insulator
I only
I and III
II and III
I, II and III
