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Entry Test MCQ :: s-BLOCK ELEMENTS


31.  Sodium is not observed in +2 oxidation state because of its
A. high first ionization potential B. high second ioniation potential
C. high ionic radius D. high electronegativity

32.  Carnalite has chemical formula
A. KCI B. KCI.MgCl2.6H2O
C. Na2B4O7.10H2O D. CaCO3.MgCO3

33.  Magnesium metal does not burn in the vessel containing
A. N2 B. O2
C. N2 and O2 D. Ne

34.  Electrolysis of dilute solution of NaCl results at the anode
A. sodium B. hydrogen
C. chlorine D. oxygen

35.  Second ionization potential of alkali metals are very high due to
A. being s-block elements B. inert gas configurations
C. ns1 electronic configuration D. being metals

36.  Which ion will have maximum value of heat of hydration?
A. A1+3 B. Cs+
C. Ba+ D. Mg+2

37.  Which one can form complex?
A. Na B. Cr
C. Li D. K

38.  Which one is natron?
A. Na2CO3 B. Na2CO3.10H2O
C. Na2CO3.H2O D. NaHCO3

39.  Addition of 2% gypsum in cement
A. Triggers hydration B. Triggers hydrolysis
C. Prevents rapid hardening D. all of the above

40.  Which one is least ionic in nature and decompose on heating.
A. LiOH B. NaOH
C. KOH D. CsOH




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