JEE Questions for Chemistry Sblock Elements Quiz 10 - MCQExams.com


Chemistry-sBlock Elements-6967.png
  • X > Y > Z
  • Z > Y > X
  • X = Y = Z
  • Z > X > Y

Chemistry-sBlock Elements-6968.png

  • Chemistry-sBlock Elements-6969.png
  • 2)
    Chemistry-sBlock Elements-6970.png

  • Chemistry-sBlock Elements-6971.png

  • Chemistry-sBlock Elements-6972.png
Sodium is heated in air at 300°C to form X. X absorbs CO2 and forms Na2 CO3 and Y? Which of the following is Y?
  • H2
  • O2
  • H2O2
  • O3
Which of the following on thermal decomposition yields basic as well as acidic oxide?
  • NaNO3
  • KClO3
  • CaCO3
  • NH4NO3
Which of the following represents the composition of carnallite mineral?
  • K2O ∙ Al2 O3 ∙ 6SiO2
  • KNO3
  • K2SO4 ∙ MgSO4 ∙ MgCl2 ∙ 6H2O
  • KCl ∙ MgCl2 ∙ 6H2O
Which one of the following orders of stability is correct?
  • MgCO3 > CaCO3 > SrCO3 > BaCO3
  • BaCO3 > SrCO3 > CaCO3 > MgCO3
  • MgCO3 > BaCO3 > SrCO3 > CaCO3
  • CaCO3 > BaCO3 > MgCO3 > SrCO3
Plaster of Paris on making paste with little water sets to hard mass due to formation of
  • CaSO4
  • CaSO4 ∙ 1/2 H2O
  • CaSO4 ∙ H2O
  • CaSO4 ∙ 2 H2O
Phosphine, acetylene and ammonia can be formed by treating water with

  • Chemistry-sBlock Elements-6974.png
  • 2)
    Chemistry-sBlock Elements-6975.png

  • Chemistry-sBlock Elements-6976.png

  • Chemistry-sBlock Elements-6977.png
Thomas slag is
  • Ca3 (PO4)2 ∙ 2H2O
  • Ca3 (PO4)2 ∙ CaSiO3
  • MgSiO3
  • CaSiO3
Which of the following hydroxides is amphoteric in nature?
  • Be(OH)2
  • Mg(OH)2
  • Ca(OH)2
  • Ba(OH)2
In which of the following reaction, MgO is not formed?
  • Mg + CO2 →
  • Mg + dil. HNO3 →

  • Chemistry-sBlock Elements-6978.png
  • Mg + B2 O3 →
Fire extinguishers contain H2SO4 and
  • NaHCO3 and Na2CO3
  • NaHCO3 solution
  • Na2CO3
  • CaCO3
The pair of compounds which cannot exist together in solution is
  • NaHCO3 and NaOH
  • NaHCO3 and H2O
  • NaHCO3 and Na2CO3
  • Na2CO3 and NaOH
An aqueous solution of sodium sulphate is electrolysed using inert electrodes. The products at the cathode and anode are respectively
  • H2, O2
  • O2, H2
  • O2, Na
  • O2, SO2
The standard reduction potentials at 25oC of Li+/Li, Ba2+/ Ba, Na+/ Na and Mg2+/Mg are –3.05, –2.73, –2.71 and –2.37 volt respectively. Which one of the following is the strongest oxidising agent?
  • Na+
  • Li+
  • Ba2+
  • Mg2+

Chemistry-sBlock Elements-6981.png

  • Chemistry-sBlock Elements-6982.png
  • 2)
    Chemistry-sBlock Elements-6983.png
  • KO2 only
  • BaO2 only
A deliquescent white crystalline hydroxide X reacts with a nitrate Y to form another hydroxide which decomposes to give a insoluble brown layer of its oxide. X is a powerful cautery and breaks down the proteins of skin flesh to a pasty mass. X and Y are
  • NaOH, AgNO3
  • NaOH, Zn(NO3)2
  • NaOH, Al(NO3)3
  • Ca(OH) 2.HgNO3
Solution of sodium metal in liquid ammonia is strongly reducing due to the presence in solution of the following
  • Sodium hydride
  • Sodium amide
  • Sodium atoms
  • Solvated electrons
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