40 Questions
What is unique about gold and silver in nature?
They are always found in their free state
What is the nature of metallic oxides?
They are basic
Which non-metal is known for its lustrous property?
Iodine
What is the green substance formed on a copper plate left exposed to air for a week in a bathroom?
Basic copper carbonate
What occurs when a metal loses an electron and a non-metal gains it?
An electrovalent compound is formed
What is the state of ionic compounds at room temperature?
Solids
What happens when calcium is treated with water?
It reacts violently with water and releases hydrogen
Which metal would be displaced from the solution of its salts by other three metals?
Cu
In which state do ionic compounds conduct electricity?
All of the above
What is the oxide of iron obtained on prolonged reaction of iron with steam?
Fe3O4
What is the primary source of metals?
Earth's crust
Which element reacts with oxygen to give a compound with a high melting point?
Calcium
What is the term for the process of extracting metals from their ores?
Metallurgy
Which of the following metals is typically extracted by electrolysis?
Potassium
What is the term for naturally occurring elements or compounds in the Earth's crust?
Minerals
Which of the following metals is typically found in its free state in nature?
Silver
What is collected over water after the metal reacts with steam?
Hydrogen gas
Which metal has the slowest reaction with steam?
Iron
What happens when hydrogen gas is tested with a lighted match stick?
It burns with a 'pop' sound
Which of the following metals does NOT react with water or steam?
Lead
What is the product formed when metals react with dilute acids?
Salt and hydrogen gas
What gas is NOT evolved when a metal reacts with nitric acid?
Hydrogen
Which metals can dissolve in Aqua-Regia?
All metals
What mixture ratio is used to create Aqua-Regia?
1 part nitric acid and 3 parts hydrochloric acid
What type of oxide is formed by aluminium and zinc metals?
Amphoteric oxide
What are the products when aluminium oxide reacts with hydrochloric acid?
Aluminium chloride and water
In the reaction between aluminium oxide and sodium hydroxide, what does aluminium oxide act as?
Acidic oxide
What is the product of the reaction between zinc oxide and hydrochloric acid?
Zinc chloride
When zinc oxide reacts with sodium hydroxide, what compound is formed?
Sodium zincate
Which metal reacts violently with cold water to form metal hydroxide and hydrogen gas?
Sodium
What is the product when calcium reacts with water?
Calcium hydroxide and hydrogen gas
What do aluminium and iron produce when they react with steam?
Aluminium oxide and iron oxide with hydrogen gas
What is the atomic number of calcium?
20
What is the electron configuration of an oxygen atom?
2,6
Which property of gold makes it suitable for making ornaments?
Ductility and lustre
Which metals melt when kept on the palm?
Gallium and caesium
Which statement is true about silver and copper?
They are the best conductors of heat.
Why are sodium and potassium stored under oil?
They react with water
What happens when soft iron nails are dipped in a strong solution of copper sulphate?
A greenish-black solution is formed
Why is aluminium's corrosion less than that of iron?
Aluminium is covered with a strong protective layer of oxide
This quiz covers the chemical reactions of aluminium oxide and zinc oxide with acidic and basic substances, including hydrochloric acid and sodium hydrate.
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