JEE Questions for Chemistry Sblock Elements Quiz 9 - MCQExams.com

Molecular formula of Glauber’s salt is ...

  • Chemistry-sBlock Elements-6947.png
  • 2)
    Chemistry-sBlock Elements-6948.png

  • Chemistry-sBlock Elements-6949.png

  • Chemistry-sBlock Elements-6950.png
30 gm of Mg and 30 gm of O2 are reacted and the residual mixture contains ...
  • 60 gm of MgO only
  • 40 gm of MgO and 20 gm of O2
  • 45 gm of MgO and 15 gm of O2
  • 50 gm of MgO and 10 gm of O2
The number and type of bonds between two carbon atoms in calcium carbides are ...
  • one sigma, one pi.
  • one sigma, two pi.
  • two sigma, one pi.
  • two sigma, two pi
Which are correct statements for Be and Al ?
  • Both are rendered passive by con.HNO3
  • Both have sp - hybridization in their compounds.
  • Both form acidic oxides
  • Both form hydrides
Identify the correct statement ?
  • Gypsum contains a lower percentage of calcium than plaster of paris
  • Gypsum is obtained by heating plaster of paris
  • Plaster of paris can be obtained by hydration of gypsum
  • Plaster of paris is obtained by partial oxidation of gypsum.
Statement-1 : Alkali metals dissolve in ammonia to give blue solutions.
Statement-2 : Alkali metals in liquid ammonia give solvated species of the type [M(NH3)x]+
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true.
Statement-1 Sodium metal is softer than potassium metal
Statement-2 Metalic bonding in Potassium is weaker than in Sodium.
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true.
Statement-1 Be(OH)2 is soluble in HCl and NaOH
Statement-2 Be(OH)2 is amphoteric in nature
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true.
Statement-1 : Be Forms [BeF4]2- but Al forms [AlF6]3-
Statement-2 Be does not have d–orbitals in the Valence shell but Al has.
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true.
Statement -1 Li2CO3 and Na2CO3 are thermally unstable.
Statement - 2 Both the carbonates are salts of large cations and large anions.
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true.
Statement - 1 Metallic character of alkali metals increases on going down a group from top to bottom.
Statement - 2 Ionisation enthalpy of alkali metals increases on going down from top to bottom.
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true.
Statement - 1 Superoxides of alkali metals are diamagnetic.
Statement - 2 Superoxides contain the ion O2– which has one unpaired electron.
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true
Statement - 1 Alkali metals do not impart colour to the flame. Statement - 2 Their ionization enthalpies are very low.
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true.
Statement - 1 Sodium cannot be obtained by chemical reduction of its ore.
Statement - 2 Sodium is one of the strongest reducing agent.
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true.
Statement - 1 Beryllium hydroxide becomes soluble in excess alkali forming beryllate ion [Be(OH)4]2-
Statement - 2 Beryllium ion has greater tendency to form complexes.
  • Statement -1 is true, statement - 2 is true Statement – 2 is a correct explanation for statement - 1
  • Statement – 1 is true, statement - 2 is true;Statement – 2 is not a correct explanation for statement - 1
  • Statement - 1 is true, statement - 2 is false
  • Statement - 1 is false, statement - 2 is true
Which pump is important in biological reaction in human body ?
  • Ca-Mg Pump
  • K-Fe Pump
  • Na-K Pump
  • Fe-Ca Pump
Which of the following reaction does not occur in solvay ammonia soda process ?

  • Chemistry-sBlock Elements-6955.png
  • 2)
    Chemistry-sBlock Elements-6956.png

  • Chemistry-sBlock Elements-6957.png

  • Chemistry-sBlock Elements-6958.png
Which sequence of reactions shows correct chemical relation between sodium and its compounds?

  • Chemistry-sBlock Elements-6959.png
  • 2)
    Chemistry-sBlock Elements-6960.png

  • Chemistry-sBlock Elements-6961.png

  • Chemistry-sBlock Elements-6962.png
The ionic conductance of following cation in a given concentration are in the order
  • L i+ < Na + < K + < Rb +
  • L i+ > Na + > K + > Rb +
  • L i+ < Na + > K + > Rb +
  • L i+ = Na + < K + < Rb +
Which of the following is known as Glauber's salt?
  • Na2 S2 O3 ∙ 5H2 O
  • Na2 SO4 ∙ 10H2 O
  • Na2 CO3 ∙ 10H2 O
  • Na(NHHPO4
The products obtained on heating LiNO3 will be
  • LiNO2 + O2
  • Li2O + NO2 + O2
  • Li3 N + O2
  • Li2O + OH + O2
Sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of
  • H2 O2
  • Na2O
  • Na2O and O3
  • NaOH and Na2 CO3
  • NaOH and H2O2
Microcosmic salt is
  • Na4 P2 O7
  • Na (NHHPO4
  • Na (NHHPO4 ∙ 4H2O
  • MgNH4 PO4
For which one of the following minerals, the composition given is incorrect ?
  • Glauber's salt — Na 2 SO4 ∙ 10H2O
  • Borax — Na 2B4 O7 ∙ 7H2 O
  • Carnallite — KCl ∙ MgCl2 ∙ 6H2O
  • Soda ash— Na 2 CO3
The carbonate that will not decompose on heating is
  • Na2CO3
  • CaCO3
  • BaCO3
  • SrCO3
  • Li2 CO3
The solubility of alkali metal hydroxide is
  • LiOH < KOH < NaOH < RbOH < CsOH
  • LiOH < NaOH < KOH < RbOH < CsOH
  • CsOH < RbOH < KOH < NaOH < LiOH
  • None of the above
The formula of the product formed, when sodium thiosulphate solution is added to silver bromide is
  • Ag2 S2 O3
  • Ag2 S
  • Na3[Ag(S2 O3)2]
  • Ag3[Na(S2 O3)2]
The chemical formula of feldspar is
  • KAlSi3 O8
  • Na3 AlF6
  • NaAlO2
  • K2SO4 ∙ Al2(SO4)3 ∙ 4Al(OH)3
KI and CuSO4 solution when mixed, give
  • CuI2 + K2 SO4
  • Cu2 I2 + K2 SO4
  • K2 SO4 + Cu2 I2 + I2
  • K2 SO4 + CuI2 + I2
Which of the following reactions does not liberate gaseous product?
  • AlCl3 + NaOH →
  • NaOH + P (white) + H2 O →

  • Chemistry-sBlock Elements-6965.png

  • Chemistry-sBlock Elements-6966.png
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Chemistry Quiz Questions and Answers