Chemistry [1 Mark Question Answer]

Answer the following question :
Write the constituents of electrolyte for the extraction of aluminum.

Answer the following question :
Name the process used for the enrichment of sulphide ore.

Answer the following question :
Name a metal which is found abundantly in earths crust.

Correct the following statement :
Haematite is the chief ore of aluminium.

Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.

Find the odd one out of the following and explain your choice : Copper, Lead, Zinc, Mercury

Find the odd one out of the following and explain your choice.
Sulphur, Phosphorous, Carbon, Iodine

Name the following:
The middle region of the blast furnace.

Name the following:
The compound formed by the reaction between calcium oxide and silica.

Name the following:
The process of heating an ore to a high temperature in the presence of air.

Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.

Name the following:
or
With reference to the physical propertie of metals and non-metals, state the following exception.
A metal which is liquid at room temperature.

A to F below relate to the source and extraction of either zinc or aluminium.
A. Bauxite
B. Coke
C. Cryolite
D. Froth floatation
E. Sodium hydroxide solution
F. Zinc blende
Write the formula of cryolite.

To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.

Write the equation for the reaction of zinc of the following: Copper sulphate solution

Write the equation for the reaction of zinc with following: Dilute sulphuric acid

Write the equation for the reaction of zinc with following: Sodium hydroxide solution

Name the ore of zinc containing its sulphide.

Write balanced equation for the following reaction:
Aluminium powder is warmed with hot and concentrated caustic soda solution.

Name a non- metal that has a metallic luster and sublimes on heating.

In order to obtain one tone of aluminium, the following inputs are required:
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
In construction work, why is the alloy of aluminium, duralumin used rather than pure aluminium.

Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.

What metallic property is shown by the non-metal graphite?

If fused metallic chloride is electrolyzed, at which electrode would the metal be obtained?

What is the type of bonding expected in a metallic chloride?

Write balanced equation for the following reaction:
Reduction of lead (II) oxide by carbon.

Write balanced equation for the following reaction:
Reduction of iron (III) oxide by carbon monoxide.

Write balanced equation for the following reaction:
Reduction of copper oxide by hydrogen.

With reference to the reduction of copper (II) oxide , iron (II) oxide, lead (II) oxide and magnesium oxide; place the oxides in order of increasing ease of reduction.[i.e. first write the oxide that is most difficult to reduce and at last, the oxide, that is most easily reduced.]

How many valence electrons are present in non- metals?

How many valence electrons are present in metals ?

Name:
The allotrope of the non-metal carbon which conducts electricity.

Name : The metal which is liquid at room temperature.

What is added to steel to make it stainless steel?

The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.

For the substance listed below, explain its role in the extraction of aluminium: Graphite

For the substance listed below, explain its role in the extraction of aluminium: Cryolite

For the substance listed below, explain its role in the extraction of aluminium: Sodium hydroxide

For the substance listed below, explain its role in the extraction of aluminium: Bauxite

Name an alloy of zinc which is used in simple voltaic cells.

The following question refer to the extraction of aluminium and iron from their ores:
What is the major impurity present in iron when it is removed from the furnace?

The following question refer to the extraction of aluminium and iron from their ores :
Name the principle ore from which i. iron, and ii. Aluminium is extracted.

Arrange the metals:
calcium, iron, magnesium and sodium in order of their reactivity with water placing the most reactive first.

Give the name and formula of an ore of zinc.
What in addition to a zinc compound, is put into the furnace? State one large scale use of zinc.

Give the name and formula of an ore of zinc.
Reduction of the zinc compound which is the product of above reaction.

Give the name and formula of an ore of zinc.
Roasting of the ore

Name a metal which occurs free in nature.

Name a non-metallic element which is a conductor of electricity.

Name a non-metallic element which is a liquid at ordinary temperatures

Name a non-metallic element which has a metallic lustre