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MCQ (Practice) - S Block (Level 2) - Class 11 MCQ


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25 Questions MCQ Test - MCQ (Practice) - S Block (Level 2)

MCQ (Practice) - S Block (Level 2) for Class 11 2024 is part of Class 11 preparation. The MCQ (Practice) - S Block (Level 2) questions and answers have been prepared according to the Class 11 exam syllabus.The MCQ (Practice) - S Block (Level 2) MCQs are made for Class 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for MCQ (Practice) - S Block (Level 2) below.
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MCQ (Practice) - S Block (Level 2) - Question 1

An aqueous solution of an halogen salt of potassium reacts with same halogen Xto give KX3, a brown coloured solution, in which halogen exists as X3- ion, X2 as a Lewis acid and X- as a Lewis base, halogen X is -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 1

MCQ (Practice) - S Block (Level 2) - Question 2

The correct order of basic-strength of oxides of alkaline earth metals is -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 2

from Fajan’s rule
Basic Nature α Ionic character

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MCQ (Practice) - S Block (Level 2) - Question 3

The order of melting point of chlorides of alkali metals is -?

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 3

From Fajan rule
M.P. a thermal stability a Lattice energy

MCQ (Practice) - S Block (Level 2) - Question 4

  product X is -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 4

Sodium formate (HCOONa) is produced by absorption of carbon monoxide by sodium hydroxide at 200ºC under pressure.
CO + NaOH → HCOONa

MCQ (Practice) - S Block (Level 2) - Question 5

Z (colourless gas)  T(blue colour)

Then, substances Y and T are -?

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 5


Mg + N2 → Mg3N2 ;  Mg3N2 + H2O →Mg(OH)2 + NH3
NH3 + CuSO4 → [Cu(NH)4]SO4

MCQ (Practice) - S Block (Level 2) - Question 6

Weakest base among KOH, NaOH, Ca(OH)2 and Zn(OH)2 is -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 6

Zn(OH)2 is  amphoteric

MCQ (Practice) - S Block (Level 2) - Question 7

Formula of Chile saltpetre is

MCQ (Practice) - S Block (Level 2) - Question 8

The aqueous solutions of lithium salts are poor conductor of electricity rather than other alkali metals because of - 

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 8

Aq. radius α polarising power

MCQ (Practice) - S Block (Level 2) - Question 9

Sodium metal is highly reactive and cannot be stored under - 

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 9

Na + R – OH → R - O- Na+ + H2
Rest does not contain acidic hydrogen in faet sodium in strored in kerocene oil.

MCQ (Practice) - S Block (Level 2) - Question 10

Nitrogen dioxide cannot be prepared by heating -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 10

KNO3 → KNO2 + O2
Cu(NO3)2 → CuO + NO2 + O2
AgNO3 → Ag + NO2 + O2
Pb(NO3)2 → PbO + NO2 + O2

MCQ (Practice) - S Block (Level 2) - Question 11

In LiAlH4, metal Al is present in -?

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 11

MCQ (Practice) - S Block (Level 2) - Question 12

; the effective ingredient of X is -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 12

Ca(OCl)2 + CaCl2 → Cl2 + Ca(OH)2

MCQ (Practice) - S Block (Level 2) - Question 13

Which one of the following fluoride of alkali metals has the highest lattice energy ?

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 13

MCQ (Practice) - S Block (Level 2) - Question 14

Crown ethers and cryptands form -?

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 14


Crown ether M+  Li+ .....Cs+

MCQ (Practice) - S Block (Level 2) - Question 15

White heavy precipitates are formed when BaCl2 is added to a clear solution of compound A. Precipitates are insoluble in dilute HCl. Then, the compound A is -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 15

BaSO4 is insoluble in HCl
but BaCO3 & BaCl2 dissoluble in HCl

MCQ (Practice) - S Block (Level 2) - Question 16

Amongst LiCl, RbCl, BeCl2 and MgCl2 the compounds with the greatest and the least ionic character respectively

MCQ (Practice) - S Block (Level 2) - Question 17

X + C + Cl2Y : CO; Y + 2H2O ® Z + 2HCl

Compound Y is found in polymeric chain structure and is an electron deficient molecule. Y must be -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 17

MCQ (Practice) - S Block (Level 2) - Question 18

The correct order of degree of hydration of M+ ions of alkali metals is -?

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 18

Degress of hydration a polarising power of cation

MCQ (Practice) - S Block (Level 2) - Question 19

BeCl2 + LiAlH4 → X + LiCl + AlCl3

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 19

BeCl2 + LiAlH4 → BeH2 + LiCl + AlCl3

MCQ (Practice) - S Block (Level 2) - Question 20

The order of thermal stability of carbonates of IIA group is -?

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 20

As we go down the group, the carbonates have to be heated more strongly before they will decompose. It means the stability increases from MgCO3to BaCO3
So the correct order of stability of carbonates of Group IIA is BaCO3 > SrCO3 > CaCO3 > MgCO3.

MCQ (Practice) - S Block (Level 2) - Question 21

A pair of substances which gives the same products on reaction with water is -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 21

Ca + H2O → Ca(OH)2 + H2O
CaH2 + H2O → Ca(OH)2 + H2
hydroith

MCQ (Practice) - S Block (Level 2) - Question 22

Which of the following is not a anomalous property of lithium ?

MCQ (Practice) - S Block (Level 2) - Question 23

The incorrect statement (s) is/are -?

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 23

Chlorophyll, the gren pigment in plant is complex of magnesium.

MCQ (Practice) - S Block (Level 2) - Question 24

The commercial method of preparation of potassium by reduction of molten KCl with metallic sodium at 850°C is based on the fact that -?

MCQ (Practice) - S Block (Level 2) - Question 25

Be2C + H2O → BeO + X

CaC2 + H2O → Ca(OH)2 + Y; then X and Y respectively -

Detailed Solution for MCQ (Practice) - S Block (Level 2) - Question 25

Be2C + H2O  Be(OH)2 + CH4
(Be2+)2...C4

Blue colour due to commonicated electron.

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