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Test: Introduction to Group-2 Elements (Old NCERT) - NEET MCQ


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10 Questions MCQ Test Chemistry Class 11 - Test: Introduction to Group-2 Elements (Old NCERT)

Test: Introduction to Group-2 Elements (Old NCERT) for NEET 2024 is part of Chemistry Class 11 preparation. The Test: Introduction to Group-2 Elements (Old NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Introduction to Group-2 Elements (Old NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Introduction to Group-2 Elements (Old NCERT) below.
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Test: Introduction to Group-2 Elements (Old NCERT) - Question 1

BeCl2 exists as a polymer in:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 1

 

BeCl2 exists as a polymer in solid state. In this case Be atom is tetrahedrally surrounded by four chlorine atoms.

Test: Introduction to Group-2 Elements (Old NCERT) - Question 2

Alkaline earth metals show:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 2

The alkaline earth metals are all of theelements in the second column (column 2A) of the periodic table. This group includes beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra). Alkaline earth metalshave only two electrons in their outermost electron layer.

Test: Introduction to Group-2 Elements (Old NCERT) - Question 3

In the periodic table the element with atomic number 38 belongs to:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 3

In the periodic table, the element with atomic number 38 belongs to period V and group II. It is a s-block element. It is called an alkali earth metal.

Test: Introduction to Group-2 Elements (Old NCERT) - Question 4

The nature of the oxide of radium is:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 4

Radium belongs to group 2, which is an alkaline earth metal group. So, oxide of radium will be basic in nature.

Test: Introduction to Group-2 Elements (Old NCERT) - Question 5

Be and Mg do not react with water. This is because of:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 5

Due to the formation of oxide layers on their surface, Be and Mg do not react with water.

Test: Introduction to Group-2 Elements (Old NCERT) - Question 6

Ionisation potential of alkaline earth metal is:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 6

Along the period, effective nuclear charge dominates. So electrons will be pulled by more force in alkaline earth metal than in alkali metal. So the ionisation potential of alkaline earth is more than alkali metals.

Test: Introduction to Group-2 Elements (Old NCERT) - Question 7

The general electronic configuration of the outermost orbit in the case of alkaline earth metal is:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 7

The elements in Group 2 (beryllium, magnesium, calcium, strontium, barium, and radium) are called the alkaline earth metals . These elements have two valence electrons, both of which reside in the outermost s sublevel. The general electron configuration of all alkaline earth metals is ns2.

Test: Introduction to Group-2 Elements (Old NCERT) - Question 8

The alkaline earth metals which do not give colour to flame is:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 8

Beryllium and magnesium atoms are smaller in size and their electrons are strongly bound to the nucleus. They need large amounts of energy for excitation of electrons to higher energy levels which is not available in the bunsen flame. So they do not impart colour to the flame.

Test: Introduction to Group-2 Elements (Old NCERT) - Question 9

Mg(NO3)2 on thermal decomposition yields:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 9

2Mg(NO3)2 → 2MgO + 4NO2 + O2

Test: Introduction to Group-2 Elements (Old NCERT) - Question 10

A substance which gives a brick red flame and breaks down on heating giving oxygen and brown gas is:

Detailed Solution for Test: Introduction to Group-2 Elements (Old NCERT) - Question 10

Since the magnesium or its compound does not give flame test, it must be a compound of calcium. Also the gas evolved is brown coloured shows that it is the oxide of nitrogen. All these inference indicates towards the compound calcium nitrate.

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