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Class 11 Exam  >  Class 11 Tests  >  MCQ (Practice) - S Block (Level 2) - Class 11 MCQ

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
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An aqueous solution of an halogen salt of potassium reacts with same halogen X2 to 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 -

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MCQ (Practice) - S Block (Level 2) - Question 2
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The correct order of basic-strength of oxides of alkaline earth metals is -

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from Fajan’s rule
Basic Nature α Ionic character

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MCQ (Practice) - S Block (Level 2) - Question 3
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The order of melting point of chlorides of alkali metals is -?

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

MCQ (Practice) - S Block (Level 2) - Question 4
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  product X is -
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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
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Z (colourless gas)  T(blue colour)

Then, substances Y and T are -?
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Mg + N2 → Mg3N2 ;  Mg3N2 + H2O →Mg(OH)2 + NH3
NH3 + CuSO4 → [Cu(NH)4]SO4

MCQ (Practice) - S Block (Level 2) - Question 6
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Weakest base among KOH, NaOH, Ca(OH)2 and Zn(OH)2 is -
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Zn(OH)2 is  amphoteric

MCQ (Practice) - S Block (Level 2) - Question 7
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Formula of Chile saltpetre is
MCQ (Practice) - S Block (Level 2) - Question 8
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The aqueous solutions of lithium salts are poor conductor of electricity rather than other alkali metals because of - 
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Aq. radius α polarising power

MCQ (Practice) - S Block (Level 2) - Question 9
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Sodium metal is highly reactive and cannot be stored under - 
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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
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Nitrogen dioxide cannot be prepared by heating -
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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
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In LiAlH4, metal Al is present in -?
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MCQ (Practice) - S Block (Level 2) - Question 12
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; the effective ingredient of X is -
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Ca(OCl)2 + CaCl2 → Cl2 + Ca(OH)2

MCQ (Practice) - S Block (Level 2) - Question 13
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Which one of the following fluoride of alkali metals has the highest lattice energy ?
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MCQ (Practice) - S Block (Level 2) - Question 14
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Crown ethers and cryptands form -?
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Crown ether M+  Li+ .....Cs+

MCQ (Practice) - S Block (Level 2) - Question 15
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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 -
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BaSO4 is insoluble in HCl
but BaCO3 & BaCl2 dissoluble in HCl

MCQ (Practice) - S Block (Level 2) - Question 16
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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
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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 -
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MCQ (Practice) - S Block (Level 2) - Question 18
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The correct order of degree of hydration of M+ ions of alkali metals is -?
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Degress of hydration a polarising power of cation

MCQ (Practice) - S Block (Level 2) - Question 19
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BeCl2 + LiAlH4 → X + LiCl + AlCl3
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BeCl2 + LiAlH4 → BeH2 + LiCl + AlCl3

MCQ (Practice) - S Block (Level 2) - Question 20
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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
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A pair of substances which gives the same products on reaction with water is -
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Ca + H2O → Ca(OH)2 + H2O
CaH2 + H2O → Ca(OH)2 + H2
hydroith

MCQ (Practice) - S Block (Level 2) - Question 22
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Which of the following is not a anomalous property of lithium ?
MCQ (Practice) - S Block (Level 2) - Question 23
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The incorrect statement (s) is/are -?
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Chlorophyll, the gren pigment in plant is complex of magnesium.

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