A
B
C
D
100
"Solid elements or compounds present naturally with definite crystalline structures and chemical compositions"
This is the definition of ___________________ ?
Minerals
100
What does Hg stands for?
Mercury
100
What does Pb stands for?
Lead
100
This is exothermic or endothermic reaction?
Endothermic
200
the prefix 'exo' in exothermic stands for ____________ ?
outside
200
I am a type of mineral that has many uses in daily life such as in construction of roads, buildings and table tops.
Who am I?
Limestone
200
This is example of exothermic or endothermic reaction?
Exothermic reaction
200
Initial temperature: 37°C
Final temperature: 41°C
This is example of endothermic or exothermic reaction?
Exothermic reaction
300
Systematic name for calcite is calcite carbonate. What are the elements in calcite?
Calcium, carbon, oxygen
300
During first step of iron extraction, what substrate that is added in the blast furnace other than iron ore and limestone?
coke
300
Between iron and tin, which one is more reactive to oxygen?
Iron / Fe
300
State two natural elements for minerals.
Silver/Gold/Diamond
400
Na > Ca > X > Al
What is X according to the reactivity series of metal?
Mg / Magnesium
400
Solidified molten iron is known as _______________?
cast iron
400
Why lithium battery cannot be carried by passenger in their luggage?
Lithium batteries will explode when heated
400
Bonus Question
500
This is the equation for one of the process in production of iron.
Carbon dioxide + X -> carbon monoxide
What is X?
carbon
500
Why the molten slag is channeled above molten iron?
Molten slag is less dense than molten iron
500
Arrange these elements in descending reactivity towards oxygen
Potassium (K)
Zinc (Zn)
Mercury (Hg)
Aluminium (Al)
Potassium (K), Aluminium (Al), Zinc (Zn), Mercury (Hg)
500
In the extraction of tin ore, reactants added to the blast furnace are coke, limestone and X.
Name X.
Tin oxide (Casiterite)