Chemistry Chapter 11 Entry Test MCQs
76. Magnesia is
a. MgSO4
b. MgCO3
c. MgCl2
d. MgO
77. A metal M reacts with N2 to give a compound ‘A’ (M3N). ‘A’ on heating at high temperature gives back ‘M’ and ‘A’ on reacting with H2O gives a gas ‘B’. A and B can be
a. Na and NH3
b. Al and NH3
c. Mg and NH3
d. Li and NH3
78. The reaction of water with sodium and potassium is
a. Reversible
b. Exothermic
c. Irreversible and endothermic
d. Endothermic
79. Which of the following metal has stable carbonates?
a. Al
b. Na
c. Si
d. Mg
80. Amongst LiCl, RbCl, BeCl2 and MgCl2 the compounds with the greatest and least ionic character respectively are
a. RbCl and BeCl2
b. LiCl and RbCl
c. RbCl and MgCl2
d. MgCl2 and BeCl2
81. Of the metals Be, Mg, Ca and Sr of group II A. In the periodic table the least ionic chloride would be formed by
a. Ca
b. Be
c. Sr
d. Mg
82. The property of hydrogen which distinguishes it from other alkali metals is
a. Its affinity for non-metals
b. Its electropositive character
c. Its non-metallic character
d. Its reducing character
83. As compared to potassium, sodium has
a. Higher ionization potential
b. Lower electronegativity
c. Lower melting point
d. Greater atomic radius
84. Sodium is kept in
a. Kerosene
b. Alcohol
c. Liquid ammonia
d. Water
85. Which of the following statement is correct regarding alkali metals
a. Cation is smaller than the atom
b. Cation is less stable than the atom
c. Cation is greater in size than the atom
d. Size of cation and atom is the same
86. As compared to lithium, sodium reacts quickly with water because
a. It is stronger electronegative
b. Its molecular weight is less
c. It is a metal
d. It is stronger electropositive
87. Correct order of increasing activity is
a. Mg, Na, Cu
b. Cu, Mg, Na
c. Cu, Na, Mg
d. Na, Mg, Cu
88. Which is most basic in character?
a. NaOH
b. RbOH
c. LiOH
d. KOH
89. The alkali metal that reacts with nitrogen directly to form nitride is
a. K
b. Li
c. Rb
d. Na
90. Which is true for an element R present in III group of the periodic table
a. It has oxidation state of +4
b. It is gas at room temperature
c. It forms RX2
d. It forms R2O3