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S-Block Elements - Practice Test (1) - Class 9 MCQ


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25 Questions MCQ Test - S-Block Elements - Practice Test (1)

S-Block Elements - Practice Test (1) for Class 9 2024 is part of Class 9 preparation. The S-Block Elements - Practice Test (1) questions and answers have been prepared according to the Class 9 exam syllabus.The S-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 S-Block Elements - Practice Test (1) below.
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S-Block Elements - Practice Test (1) - Question 1

The s-block elements of the Periodic Table have only

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

s block comprises of only two groups alkali metal group and alkaline earth metal groups

S-Block Elements - Practice Test (1) - Question 2

The general electronic configuration of ns2 exists in:

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

The general electronic configuration of ns2 exists in alkaline earth metals

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S-Block Elements - Practice Test (1) - Question 3

In the preparation of Sodium carbonate the by- product formed is:

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

CaCl2 is the by product.

S-Block Elements - Practice Test (1) - Question 4

Heating a pulverised mixture of limestone and clay in a rotary kiln is used in the manufacture of:

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

Heating a pulverised mixture of limestone and clay in a rotary kiln is used in the manufacture of Portland cement

S-Block Elements - Practice Test (1) - Question 5

Dead burnt plaster is

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Dead burnt Plaster is CaSO4

S-Block Elements - Practice Test (1) - Question 6

Group I of the periodic Table consists of the elements collectively known as

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

Group I ( ns1) is alkali metal group.

S-Block Elements - Practice Test (1) - Question 7

The alkali metals and their salts impart characteristic colour to an oxidizing flame because:

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

Alkali metals have one unpaired electron in their valence shell which gets excited absorbing the energy from flame and emit in visible reason of EM spectrum. Therfore imparts color to flame.

S-Block Elements - Practice Test (1) - Question 8

Washing soda is

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

Washing soda is Na2CO3.10 H2O

S-Block Elements - Practice Test (1) - Question 9

Cement is an industrially important compound of

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

Cement is the important compound of Calcium.

S-Block Elements - Practice Test (1) - Question 10

Suspension of slaked lime in water is known as

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

Suspension of slaked lime in water is known as milk of magnesia.

S-Block Elements - Practice Test (1) - Question 11

Group Il of the periodic table with one exception consists of the elements collectively known as

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

Group II ( ns2) is alkaline Earth metal group

S-Block Elements - Practice Test (1) - Question 12

Flame photometry is used to detect

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

Flame photometry is used to detect alkali metals.

S-Block Elements - Practice Test (1) - Question 13

The common salt or table salt is

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

Common salt is NaCl.

S-Block Elements - Practice Test (1) - Question 14

The alkali metals are low melting. Which of the following alkali metal is expected? to melt if the room temperature rises to 30C?

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

Cs has very low melting point (30C)

S-Block Elements - Practice Test (1) - Question 15

Which of the following elements does not form hydride by direct heating with dihydrogen?

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

Be doesnot form hydride directly by reacting with hydrogen.

S-Block Elements - Practice Test (1) - Question 16

One of the following is not called alkaline earth metal.

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

Ist element of every group differs from rest elements in their properties.

S-Block Elements - Practice Test (1) - Question 17

The electronic configuration of 7s1 belongs to

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

Fr belongs to 7th period so n=7.

S-Block Elements - Practice Test (1) - Question 18

Caustic soda is

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

Caustic Soda is NaOH.

S-Block Elements - Practice Test (1) - Question 19

Alkali metals react with water vigorously to form hydroxides and dihydrogen.Which of the following alkali metals reacts with water least vigorously?

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

Li reacts with water least vigorously.

S-Block Elements - Practice Test (1) - Question 20

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

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

Ca give brick red flame.

S-Block Elements - Practice Test (1) - Question 21

Calcium and Magnesium belong to the category of

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

They are alkaline earth metals

S-Block Elements - Practice Test (1) - Question 22

The alkali metals burn vigorously in oxygen forming oxides. Hence, potassium forms

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

alkali metals burns vigorously to form superoxides.

S-Block Elements - Practice Test (1) - Question 23

Sodium hydrogencarbonate is known as

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

NaHCOis baking soda.

S-Block Elements - Practice Test (1) - Question 24

The reducing power of a metal depends oh various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution. 

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

Lithium has highest hydration enthalpy which accounts for its high negative E° value and its high reducing power.

S-Block Elements - Practice Test (1) - Question 25

Which of the following statements is true about Ca(OH)2?

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

Ca(OH)2 is used in the manufacture of bleaching powder.

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