A Level Chemistry A H432

A Level Chemistry A H432/01 Periodic
table, elements and physical chemistry




What is the bonding between the ligands and the metal ion in [Fe(H2O)6] 2+? - question
and answerD- Dative covalent

What is the oxidation number of Mn in K2MnO4 - question and answerC- +6

Which calcium compound contains the greatest percentage by mass of calcium?
A calcium carbonate
B calcium nitrate
C calcium hydroxide
D calcium sulfate - question and answerc- calcium hydroxide

0.0200mol of calcium oxide is reacted completely with 2.00moldm-3 HCl. What is the
volume, in cm3, of 2.00moldm-3 HCl required for this reaction?
A 15
B 20
C 30
D 60 - question and answerB- 20

How many electrons are removed from 2.02 × 10-2 g of Ne(g) atoms to form Ne+(g)
ions?
A 3.36 × 10-26
B 1.66 × 10-27
C 6.02 × 10^20
D 1.22 × 10^22 - question and answerNe-> Ne+ + e-
mol ratio Ne:e- -> 1:;1
atomic mass Ne=20.2
n (ne atom) = 2.02 x 10-2/20.2= 10-3 (e- removed)
no of e- removed= e- removed x Avogadro's constant = 10-3 x 6.02x1023= 6.02 x 10^20
(option c)