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Some P-Block Elements - Practice Test (1) - Class 9 MCQ


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25 Questions MCQ Test - Some P-Block Elements - Practice Test (1)

Some P-Block Elements - Practice Test (1) for Class 9 2024 is part of Class 9 preparation. The Some P-Block Elements - Practice Test (1) questions and answers have been prepared according to the Class 9 exam syllabus.The Some P-Block Elements - Practice Test (1) MCQs are made for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Some P-Block Elements - Practice Test (1) below.
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Some P-Block Elements - Practice Test (1) - Question 1

The valence shell electronic configuration of p-block elements is ns2np1-6. But this is not true in the case of

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 1

He has 1s2 configuration. It is a noble gas.

Some P-Block Elements - Practice Test (1) - Question 2

The angular shape of ozone molecules (O3) consists of

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 2

Oconsists of 2 sigma bond and 1 pie bond.

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Some P-Block Elements - Practice Test (1) - Question 3

Catenation i.e., linking of similar atoms depends on size and electronic configuration of atoms. The tendency of catenation in Group 14 elements follows the order:

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 3

Catenation property decreases down the group

Some P-Block Elements - Practice Test (1) - Question 4

Regular use of which of the following fertilizers increases the acidity of the soil?

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 4

Ammonium sulphate addition increases acidity in the soil.

Some P-Block Elements - Practice Test (1) - Question 5

Among the following which is the strongest oxidizing agent?

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 5

F2 is very strong oxidizing agent.

Some P-Block Elements - Practice Test (1) - Question 6

There are six groups of p-block elements in the periodic table numbering from

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 6

P block elements starts from group 13 to group 18.

Some P-Block Elements - Practice Test (1) - Question 7

Argon is used

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 7

Ar is used in high temp welding.

Some P-Block Elements - Practice Test (1) - Question 8

In the structure of diborane

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 8

B2H6 has 4 terminal H attached to B atoms ans all these lie I the same plane. Also in diborane we have 2 bridging hydrogen(3c 2 electron ) which lie perpendicular to the plane.

Some P-Block Elements - Practice Test (1) - Question 9

The percentage of p-character in the orbitals forming P - P bonds in P4 is

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 9

obitals forming P-P bond is sp3 hybridised therefore have 75% p character.

Some P-Block Elements - Practice Test (1) - Question 10

The brown ring test for nitrates depends on

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 10

in ring test of nitrates nitrate ion is reduced to nitric oxide.

Some P-Block Elements - Practice Test (1) - Question 11

The variation in properties in a group of p-block of elements is due to

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 11

The difference in properties of p block element is because of presence of inner lying d and f electrons.

Some P-Block Elements - Practice Test (1) - Question 12

Silicon is the second most abundant element on the earth’s crust and is a component of

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 12

Si is the most imp component of ceramics.

Some P-Block Elements - Practice Test (1) - Question 13

Quartz is extensively used as a piezoelectric material, it contains ___________.

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 13

Quartz contains Si.

Some P-Block Elements - Practice Test (1) - Question 14

When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 14

Some P-Block Elements - Practice Test (1) - Question 15

One mole of magnesium nitride on the reaction with an excess of water gives:

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 15

Mg3N2 on hydrolysis roduces two moles of ammonia.

Some P-Block Elements - Practice Test (1) - Question 16

The maximum oxidation state shown by a p-block element is

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 16

Maximum oxidation state of any p block element is sum of s and p electrons present in valence shell. Example for group 15 elements valence shell configuration is ns2np3 so max oxidation state is +5

Some P-Block Elements - Practice Test (1) - Question 17

Carbon is most widely distributed in nature. In combined state it is available as

 

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 17

In combined C can occur like hydrocarbons.

Some P-Block Elements - Practice Test (1) - Question 18

The linear shape of CO2 is due to _________.

 

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 18

O=C=O in CO2 hybridisation of C is sp so due to pЛ –pЛ bonding it is linear.

Some P-Block Elements - Practice Test (1) - Question 19

In which of the following compounds, nitrogen exhibits highest oxidation state?

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 19

In azide ( N3) have oxidation state -1/3

Some P-Block Elements - Practice Test (1) - Question 20

Which of the following statements is not valid for oxoacids of phosphorus?

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 20

hypophosphous acid is H3PO2 which is monoprotic acid.

Some P-Block Elements - Practice Test (1) - Question 21

The sum of the s and p-electrons is called

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 21

Max oxidation state is also known as group oxidation state.

Some P-Block Elements - Practice Test (1) - Question 22

Stable isotopes of carbon are

 

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 22

C12and C13 isotope of Carbon are very stable.

Some P-Block Elements - Practice Test (1) - Question 23

The reason for small radius of Ga compared to Al is _______.

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 23

due to screening effect size of Ga< Al as in Ga d-electrons are present which have poor shielding effect so nuclear charge increases and size decreases.

Some P-Block Elements - Practice Test (1) - Question 24

The correct order of increasing bond angles in the following species is

 

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 24

The correct order of increasing bond angles in the following species is Clo2< Cl2O < ClO2

Some P-Block Elements - Practice Test (1) - Question 25

Argon is used

Detailed Solution for Some P-Block Elements - Practice Test (1) - Question 25

Ar is used in high temp welding.

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