WorksheetsReview ( 1st term)
Total questions: 17
Worksheet time: 14mins
Which of these species has a trigonal planar structure?
PH3
BCl3
H3O+
CH3-
Use your understanding of intermolecular forces to predict which of these compounds has the
highest boiling point.
HF
HCl
HBr
HI
Which type of bond is formed between N and B when a molecule of NH3 reacts with a molecule of
BF3?
Ionic
Covalent.
Co-ordinate
Van der Waals
Which of these atoms has the highest electronegativity?
Na
Mg
Cl
Ar
Which of these substances does not show hydrogen bonding?
HF
NH3
CH3COOH
CHF3
Which of these substances has permanent dipole-dipole attractions between molecules?
CCl4
C2F4
(CH3)2CO
CO2
Which one of the following molecules is not planar?
BF3
NCl3
C2H4
HCHO
Predict which one of the following has the highest boiling temperature?
CH3COOCH2CH3
CH3CH2CH2CH2OH
CH3CH2CH2CH2CH3
CH3CH2CH2CHO
How many electrons are found in a magnesium ion, Mg2+?
10
12
14
24
Europium has two isotopes. One is 153Eu with an abundance of 52.23%.
Which is the other isotope?
149Eu
150Eu
151Eu
152Eu
Which is the correct pair of molecular and empirical formulae?
C4H12, C2H6
C8H18, C4H8
C6H12, C3H6
C4H8, CH2
Which of the statement(s) below is/are true?
1) Elements in the same group have the same number of electrons.
2) Elements in the same group have similar chemical reactions.
3) Elements in the same group have different mass and proton numbers.
1, 2 and 3
1 and 2
2 and 3
only 1
What causes the trend in first ionisation energy from left to right across the periodic table?
greater number of electrons
greater shielding
increased nuclear charge
larger atomic radii
What causes the largest changes in melting point across period 2 elements?
change in bonding structure
greater electronegativity
greater number of electrons
increase in nuclear charge
Which test will identify Na2SO4?
Reaction with acid causing effervescence.
Reaction with BaCl2 forming a white precipitate.
Reaction with silver nitrate forming a precipitate.
Reaction with sodium hydroxide forming a characteristic gas which turns blue litmus red.
An atom in which the number of protons is greater than the number of neutrons is
234U
6Li
3He
2H
Which one of the following explains why boron has a lower first ionisation energy than beryllium?
A boron atom is smaller than a beryllium atom.
In beryllium all the electrons are paired in full sub-shells.
A beryllium atom has fewer protons than a boron atom.
In boron the 2p electron occupies a higher energy level than a 2s electron.
