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A-Level OCR A Chemistry MCQ Periodic Table Flashcards | StudBud

Explore/A-Level OCR A Chemistry MCQ Periodic Table

A-Level OCR A Chemistry MCQ Periodic Table

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Questions 10

Answers

1
What causes the largest changes in melting point across period 2 elements?
greater number of electrons
increase in nuclear charge
greater electronegativity
change in bonding structure
2
What causes the trend in first ionisation energy from left to right across the periodic table?
larger atomic radii
greater number of electrons
greater shielding
increased nuclear charge
3
Which test will identify NH₄NO₃?
Reaction with acid causing effervescence.
Reaction with BaCl2 forming a white precipitate.
Reaction with silver nitrate forming a precipitate.
React with NaOH forming a gas which turns blue litmus red.
4
Which will not result in a reaction?
potassium iodide with silver nitrate
potassium iodide with chlorine water
potassium bromide with silver nitrate
potassium bromide with aqueous iodine
5
Which of the statement(s) below is/are true?
only 2 and 3
only 1
only 1 and 2
1, 2 and 3
6
Which reaction does not involve the oxidation of magnesium?
magnesium reacting with water (steam)
magnesium reacting with hydrochloric acid
Mg + O2
MgCO3 + HNO3
7
Which is the most soluble in water?
Sr(OH)2
Ca(OH)2
Mg(OH)2
Ba(OH)2
8
When group 2 ions form, the outer electrons are found in:
f orbitals
d orbitals
p orbitals
s orbitals
9
What colour change will be seen in the following reaction?
clear → brown
clear → purple
brown → clear
orange → clear
10
Which test will identify Na₂SO₄?
Reaction with silver nitrate forming a precipitate.
Reaction with acid causing effervescence.
Reaction with BaCl2 forming a white precipitate.
Reaction with NaOH forming a gas that turns blue litmus red.