JEE Questions for Chemistry Sblock Elements Quiz 8 - MCQExams.com

Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally ?
  • MgCO3
  • CaCO3
  • SrCO3
  • BaCO3
The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Among the fluorides of alkali metals, the lowest solubility of LiF in water is due to...
  • Ionic nature of lithium fluoride
  • High lattice enthalpy
  • High hydration enthalpy for lithium ion.
  • Low ionisation enthalpy of lithium atom.
In the synthesis of sodium carbonate, the recovery of ammonia is done by treating NH4Cl with Ca(OH)2 .The by product obtained in this process is ...
  • NaCl
  • NaOH
  • CaCl2
  • NaHCO3
By adding gypsum to cement...
  • setting time of cement becomes less
  • setting time of cement increases
  • colour of cement becomes light
  • shining surface is obtained
The formula of sodash is ...

  • Chemistry-sBlock Elements-6928.png
  • 2)
    Chemistry-sBlock Elements-6929.png

  • Chemistry-sBlock Elements-6930.png

  • Chemistry-sBlock Elements-6931.png
Which of the following statement is true about Ca(OH)2 ?
  • It is used in the preparation of bleaching powder
  • It is a light blue solid
  • It does not possess disinfectant property
  • It is used in the manufacture of cement
Match the elements given in Column - I with the colour they impart to the flame given in Column - II.
Chemistry-sBlock Elements-6933.png
  • A-P, B-Q, C-S, D-R, E-T
  • A-Q, B-P, C-R, D-S, E-T
  • A-R, B-S, C-T, D-Q, E-P
  • A-S, B-R, C-Q, D-P, E-T
Which of the following alkaline earth metal sulphates is least soluble in water ?
  • MgSO4
  • CaSO4
  • BaSO4
  • SrSO4
A metal M readily forms water soluble sulphate MSO4 , water insoluble hydroxide and oxide MO which becomes inert on heating. The hydroxide is soluble in NaOH. The metal M is...
  • Be
  • Ca
  • Mg
  • Sr
Among the following compounds of cement which is present in the highest amount ?
  • Ca2SiO4
  • Al2O3
  • Ca3SiO5
  • Ca3Al2O6
Which pair of the following chlorides do not impart colour to the flame ?
  • BeCl2 and SrCl2
  • BeCl2 and MgCl2
  • BaCl2 and CaCl2
  • MgCl2 and CaCl2
The order of decreasing polarity in the compounds CaO, CsF, KCl, MgO is ________
  • CaO, CsF, KCl, MgO
  • MgO, KCl, CaO, CsF
  • KCl, CaO, CsF, MgO
  • CsF, KCl, CaO, MgO
A compound (A) on heating gives a colourless gas and a residue that is dissolved in water to obtain (B). Excess of CO2 is bubbled through aqueous solution of B, (C) is formed, which is recovered in the solid form. Solid (C) on gentle heating gives back (A). The compound is ...
  • CaCO3
  • K2CO3
  • Na2CO3
  • CaSO4 ∙ 2H2O
For alkaline metal, which of the following trends is incorrect ?
  • Hydration enthalpy : Be > Mg > Ca > Sr
  • Second Ionization enthalpy: Be > Mg > Ca > Sr
  • Density : Sr > Be > Mg > Ca
  • Atomic size : Sr > Ca > Mg > Be
The basic character of the oxides MgO, SrO, K2O, NiO and Cs2O increases in the order :
  • MgO > SrO > K2O > NiO > Cs2O
  • Cs2O < K2O < MgO < SrO < NiO
  • NiO < MgO < SrO < K2O < Cs2O
  • K2O < NiO < MgO < SrO < Cs2O
Which of the following are arranged in increasing order of solubilities ?
  • CaCO3 < KHCO3 < NaHCO3
  • NaHCO3 < KHCO3 < CaCO3
  • KHCO3 < NaHCO3 < CaCO3
  • CaCO3 < NaHCO3 < KHCO3
The compound insoluble in acetic acid is ...
  • Calcium oxide
  • Calcium carbonate
  • Calcium oxalate
  • Calcium hydroxide
The correct order of decreasing ionic character is ...
  • BeCl2 > MgCl2 > CaCl2 > BaCl2
  • BeCl2 > MgCl2 > BaCl2 > CaCl2
  • BeCl2 > BaCl2 > MgCl2 > CaCl2
  • BaCl2 > CaCl2 > MgCl2 > BeCl2
How many of the following s -block elements do not give characteristic colours in the flame test ?
Li , Be, Ca, Ba, Sr, Mg, Na, K, Ba
  • 3
  • 4
  • 2
  • 5
How many of the following sulphates of metals dissolve in the water ?
SrSO4, K2SO4, BeSO4, Li2SO4, MgSO4, BaSO4, Na2SO4, CaSO4, Rb2SO4
  • 6
  • 4
  • 3
  • 5
How many of the following hydroxides is/are amphoteric in character ?
CsOH, LiOH, Ca(OH)2, Be(OH)2, Mg(OH)2, Sr(OH)2, Ba(OH)2, KOH, NaOH.
  • 1
  • 4
  • 5
  • 3
Which of the following is not correct for work function of Na+ ions in human body ?
  • An important role in nerve signal transmission
  • Control of flow of water between cell membrane
  • For transport of sugar and amino acid in cell
  • They activate the enzyme
Which of the following is not correct ?

  • Chemistry-sBlock Elements-6935.png
  • 2)
    Chemistry-sBlock Elements-6936.png

  • Chemistry-sBlock Elements-6937.png

  • Chemistry-sBlock Elements-6938.png
Which of the following statements is/are correct for “when alkali metals are dissolved in liquid ammonia. We get...”
  • A blue solution in case of dilute alkali metal ammonia solution.
  • If we increase cocentration of metal in ammonia then the blue colour starts changing and finally changes to that of bronze colour.
  • The blue colour of the solution of alkali metal in liquid ammonia is due to excitation of free ammoniated electrons to higher energy levels.
  • All the above are correct.
Fill in the blanks with suitable option.
“The important ingredients of potland cement are dicalcium silicate ‘‘_____ ’’ % , tricalcium silicate ... % and tricalcium aluminate ‘‘_____ ’’ % respectively.”
  • 26% , 51% , 11%
  • 51% , 26% , 11%
  • 11% , 51% , 26%
  • 26% , 11% , 51%
Which of the following is the component of most of the kidney stones ?
  • (COO)2Ca
  • (COONa)2
  • (COO)2Ba
  • (COO)2Mg
The difference of water molecules in gypsum and plaster of paris is ...

  • Chemistry-sBlock Elements-6939.png
  • 2

  • Chemistry-sBlock Elements-6940.png

  • Chemistry-sBlock Elements-6941.png
The formula of carnallite is ...

  • Chemistry-sBlock Elements-6942.png
  • 2)
    Chemistry-sBlock Elements-6943.png

  • Chemistry-sBlock Elements-6944.png

  • Chemistry-sBlock Elements-6945.png
Choose proper option for matching column - I and column - II
Chemistry-sBlock Elements-6946.png
  • A-R, B-S, C-Q, D-P
  • A-P, B-Q, C-R, D-S
  • A-Q, B-P, C-R, D-S
  • A-S, B-Q, C-P, D-R
In the electrolytic separation of Li, KCl is added to LiCl ...
  • To increase the conductivity of LiCl
  • To lower the fusion temperature of the mixure
  • To decrease the conductivity of LiCl
  • Both (and (2)
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