Isolation of El...

Only One Option Correct Type

This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct

Q.

Which represents the correct abundance order of elements in the earth crust?

Which of the following contains both copper and iron?

Regarding cryolite incorrect statement is

In chromite ore, the oxidation number iron and chromium are respectively ______.

Sulphide ores are common for metals

Oxidation states of the metal in the minerals haematite and magnetite respectively are

Among the following statements the incorrect one is

A mineral is called an ore if

Which is incorrect match?

The molecular formula of Glauber's salt is:

Comprehension Type

This section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)
                                                                           Passage

The natural substances in which metals occur in the earth are called minerals. A mineral has a definite composition. It may be a single compound or a complex mixture . It is usually associated with number of impurities. The minerals from which the metals can be conveniently extracted are called ores .Thus, all ores are minerals but all minerals are not ores. Depending on the composition ores are classified into different types such as oxides, sulphides, carbonates, halides, silicates etc.

Q. The impurities associated with minerals are called.

The natural substances in which metals occur in the earth are called minerals. A mineral has a definite composition. It may be a single compound or a complex mixture . It is usually associated with number of impurities. The minerals from which the metals can be conveniently extracted are called ores .Thus, all ores are minerals but all minerals are not ores. Depending on the composition ores are classified into different types such as oxides, sulphides, carbonates, halides, silicates etc.

Q. 

Metals that exist in their native state are

Matching List Type

Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Q.

Match the Column I with Column II and mark the correct options from the codes given below

 Match the Column I with Column II and mark the correct option from the codes given below.