Question # 1

Elements of group ll-A are called

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f-block elements

s-block elements

p-block elements

d-block elements

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

The alkaline earth metals are called so because they

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form alkaline solution and are present in earth crust as minerals

form alkaline solution and are found in nature states

are present in earth crust

are present in earth crust as their minerals

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 of the following elements is most metallic

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Bi

sb

As

P

One of the following does not give the flame test. Which is that

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Sr

Bа

Be

Na

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 belongs to alkaline earth metals

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Cu

Zn

Sn

Mg

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 one of the following doesn't exhibit allotropy?

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Bi

As

N

P

One of the following metals is the most reactive and form super oxide. Indicate that

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Mg

K

Be

Li

Which of the following compounds is not known?

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SbCl

NCl3

Nl3

NCl5

The general electronic configuration of group IV-A elements is

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ns2, np6

ns2, np4

ns2, np3

ns2, np2

Which compound gives carbon when heated with conc. H2SO4.

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Starch

Ethyl alcohol

Oxalic acid

Formic acid

The element which exhibits maximum catenation property is

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C

Pb

Ge

Sn

What is the formula of clay?

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Asbestos

Talc

H2Al2(SiO4)2.H2O

Na2SiO3

Asbestos is commonly used in making

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wall board

black board

soft board

hard board

Beryllium differs from other elements of group Il-A due to

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high charge density

comparatively high nuclear charge

small radius

all above

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

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neutral

amphoteric

acidic

alkaline

What is the formula of dolomite?

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CaMg3 (SiO3)4

MgCO3

MgCO3.CaCO3,

MgSO4

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