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Worksheets4.5 Elements in Group 17
Total questions: 20
Worksheet time: 10mins
The following elements are in Group 17 in Periodic Table, Except
Fluorine
Argon
Chlorine
Bromine
Chlorine is a Group 17 elements. Which of the following statements regarding chlorine is true?
It exists as a liquid at room temperature
It reacts with water to produce hydrogen gas
It reacts with iron wool to form Iron(II) chloride
It reacts with potassium to form potassium chloride
An atom X require one electron to form ion X. What can be deduced about X?
It is a halogen
It is a noble gas
It is a Group 15 in the Periodic Table of Elements
It is in Group 16 in the Periodic Table of Elements
Chlorine gas reacts with water to form a
brown coloured solution
yellow coloured solution
solution of pH 12
solution that bleaches the colour of litmus paper
Which pairs of elements dissolve in water to produce solution that turns blue litmus paper to red and then decolourised?
Chlorine and Bromine
Chlorine and Iodine
Bromine and Astatine
Iodine and Astatine
Table above show the boiling points of three elements in Group 17. Which of the following best explain why the boiling point increases down the group?
Increase in proton number
Increase in strength of the intermolecular forces
Increase in number of occupied shells of atom
Increase in strength of the covalent bond between the atoms
L and M are diatomic elements. L is less reactive than M. Which of the following elements are L and M?
L= Bromine; M= Iodine
L= Iodine; M= Bromine
L= Sodium; M= Potassium
L= Potassium; M= Sodium
Chlorine react with cold sodium hydroxide solution. Which of the chemical equation shows the reaction?
Cl2(g)+ NaOH(aq) => NaOCl(aq) +HCl(aq)
Cl2(g)+ 2NaOH(aq) => NaOCl(aq) +H2(g) +O2(g)
2Cl2(g)+ 4NaOH(aq) => 4NaCl(aq) +2H2O(l) +O2(g)
Cl2(g)+ 2NaOH(aq) => NaCl(aq) +NaOCl(aq) +H2O(l)
An element X reacts with cold water to form an alkaline solution whereas the elements Y reacts with water to form an acidic solution which can decolourise the litmus papers. If X and Y reacts with each other, the formula of the compound formed is
XY
X2Y
XY2
X2Y3
Which of the following is a solid at room temperature?
Fluorine
Chlorine
Bromine
Iodine
Which of the following properties decreases going down the group?
Boiling point
Reactivity
Melting point
Atomic radius
How is the appearance of bromine?
purplish-black solid
reddish-brown liquid
greenish-yellow gas
pale yellow gas
When bromine is added to sodium hydroxide and shaken, which of the following products is not formed?
sodium bromide
hypobromic acid
water
sodium bromate (I)
Astatine would form 2 acids, HAt and HOAt, when added to water. Why is the reaction very slow compared to other halogens?
Its valence shell is the furthest away from the nucleus
It has one valence electron in its outermost shell
Its atomic radius is smaller than the others
Its melting point is higher than the others
When descending Group 17 from fluorine to astatine,
I. the atomic size decreases
II. the melting and boiling points decrease
III. the density of the halogens increases
IV. their physical state changes from gas to liquid to solid
I and II
I and III
II and IV
III and IV
Based on what you have learnt, predict the properties of Astatine. Given that Astatine is an element in Group 17 of the Periodic Table.
Dark brown colour gas with a rapid reaction with H2O to give 2 acids
Black colour solid with a no reaction with H2O
Black colour solid with a very slow reaction with H2O to give 2 acids
Dark brown colour solid with a no reaction with H2O
Element Y is located in the same group as chlorine in the Periodic Table of Elements. Which of the following is correct about Y?
Forms Y+ ion
Form basic oxide
Exists as monoatomic
has seven valence electrons
Which characteristics is correct about elements in Group 17 in the Periodic Table as going down the group?
The reactivity increases
The intensity of colour decreases
The tendency to accept an electron decreases
The physical state changes from liquid to gas
The boiling point of chlorine is lower than bromine. Which statement best explains the phenomena?
The atomic size of chlorine is smaller
The number of electrons in chlorine is smaller
The covalent bond between chlorine atoms is weaker
The force of attraction between chlorine molecules is weaker
Which characteristics is similar for all elements in Group 17 of the Periodic Table of ELements?
Form coloured ions
High melting and boiling points
Exist as gas at room temperature
Dissolve in water to form acidic solution
