PrepBharat

1. Which of the followng has lowest melting point?
a) \[SrF_{2}\]
b) \[BeF_{2}\]
c) \[MgF_{2}\]
d) \[CaF_{2}\]

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2. Amongst LiCl, RbCl, \[BeCl_{2}\] and \[MgCl_{2}\]  the compounds with greatest and the least ionic character, respectively, are
a) LiCl and RbCl
b) \[RbCl\]  and \[BeCl_{2}\]
c) \[RbCl\]  and \[MgCl_{2}\]
d) \[MgCl_{2}\]  and \[BeCl_{2}\]

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3. Melting point of calcium halides decreases in the order
a) \[CaF_{2}>CaCl_{2}>CaBr_{2}>CaI_{2}\]
b) \[CaI_{2}>CaBr_{2}>CaCl_{2}>CaF_{2}\]
c) \[CaBr_{2}>CaI_{2}>CaF_{2}>CaCl_{2}\]
d) \[CaCl_{2}>CaBr_{2}>CaI_{2}>CaF_{2}\]

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4. Which liberates ammonia when treated with water?
a) \[Li_{3}N\]
b) \[Mg_{3}N_{2}\]
c) \[CaCN_{2}\]
d) All of these

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5. The value of x is maximum for
a) \[MgSO_{4}.xH_{2}O\]
b) \[CaSO_{4}.xH_{2}O\]
c) \[BaSO_{4}.xH_{2}O\]
d) All have the same value of x.

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6. Which of the following shows high tendency to form a peroxide?
a) Lithium
b) Beryllium
c) Magnesium
d) Radium

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7. Which of the following alkaline earth metal oxides shows a coordination number four?
a) BeO
b) MgO
c) SrO
d) CaO

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8. The basic character of the oxides \[MgO , SrO ,K_{2}O,NiO ,Cs_{2}O\]      increases in the order
a) \[MgO > SrO >K_{2}O>NiO >Cs_{2}O\]
b) \[Cs_{2}O<K_{2}O<MgO< SrO<NiO \]
c) \[NiO < MgO < SrO<K_{2}O<Cs_{2}O\]
d) \[K_{2}O<NiO < MgO < SrO<Cs_{2}O\]

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9. Which of the following has correct increasing basic strength?
a) MgO < BeO < CaO < BaO
b) BeO < MgO < CaO < BaO
c) BaO < CaO < MgO < BeO
d) CaO < BaO < BeO < MgO

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10. Among the following oxides, the one which is most basic is
a) ZnO
b) MgO
c) \[Al_{2}O_{3}\]
d) \[N_{2}O_{5}\]

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