Question # 1

Which of the following element has high m.p and b.p, it acts as a reducing agent, and can react with bases?

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Sr

Ca

Be

Mg

Li resembles with Mg, because

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the ratio of their charge to size is nearly the same

both have nearly same size

both are metallic in nature

both are found together in nature

Formula of sodium beryllite is

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Na2B4O7

Na2BeO2

BeONa

Na2B4O7 .10 H2O

Which of the following elements is most metallic

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Bi

sb

As

P

Which is not mineral of AI?

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Diaspore

Corrundam

Bauxite

Galena

What is the formula of bauxite?

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Al2O3.2H2O

Al2O3

Na2B4O7 .10 H2O

Ca2B6O11. 5H2O

Which one of the following elements is not an alkali metal?

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Na

Sr

Cs

Rb

The reaction between Cu and conc. H2SO4 produces

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Cu+2

SO₂

SO₃

H₂

Which compound gives carbon when heated with conc. H2SO4.

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Starch

Ethyl alcohol

Oxalic acid

Formic acid

Which one of the following doesn't exhibit allotropy?

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Bi

As

N

P

Lithium differs from rest of members of its group due to which of following reasons

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High E.N of Li+1

Small radius

High charge density

All above are correct

Which of the following configurations corresponds to alkaline earth metals?

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[Ar] 3d10, 4s2

[Ne] 3d2, 3p2

[Ar] 4s2

[Ar], 3d10, 4s1

Which of the following does not give flame test?

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Li

Ba

Mg

Sr

The element which exhibits maximum catenation property is

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C

Pb

Ge

Sn

Which one of following property is not true about alkali metals?

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Strongest bases due to their hydrides

Low ionization energy

Oxidation number more than +1

Form acidic oxides

Which of the following are not known to form compounds in more than one oxidation state?

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Transition metals

Halogens

Alkali metals

Noble gases

Which alkaline earth metal makes peroxide?

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Ba

Be

Mg

Ca

How magnesium reacts with water?

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In frozen ice water

With cold water

In with steam

In hot state

Elements of II-A group are called alkaline earth metals due to the reason that

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they occur in earth only

they form divalent cations only

they have ns2 electronic configuration

their oxides and hydroxides are alkaline in nature and metals are present in earth crust

The elements of group I-A react violently with water and make the solution

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neutral

amphoteric

acidic

alkaline

Which of the following belongs to alkaline earth metals

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Cu

Zn

Sn

Mg

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