Question # 1

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

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Na

Sr

Cs

Rb

Which is the least reactive of all the alkali metals

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Li

Na

K

Cs

Formula of sodium beryllite is

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Na2B4O7

Na2BeO2

BeONa

Na2B4O7 .10 H2O

What is the formula of silica?

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Si2O3

SiO2

Si3O4

SiO-

What is the formula of cryolite?

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Al2O3.2H2O

Na2B4O7 .10 H2O

Na3AIF6

Ca2B6O11. 5H2O

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

Which one of the following doesn't exhibit allotropy?

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Bi

As

N

P

What is the formula of dolomite?

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CaMg3 (SiO3)4

MgCO3

MgCO3.CaCO3,

MgSO4

Which alkaline earth metal makes peroxide?

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Ba

Be

Mg

Ca

What is the formula of clay?

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Asbestos

Talc

H2Al2(SiO4)2.H2O

Na2SiO3

Which one of the following elements is most electropositive out of group I -A and II-A group?

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K

Mg

Na

Ca

Which of the following does not give flame test?

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Li

Ba

Mg

Sr

Which compound gives carbon when heated with conc. H2SO4.

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Starch

Ethyl alcohol

Oxalic acid

Formic acid

What is the formula of magnesite?

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PbS

MgSO4. 7H2O

MgCO3

CaCO3

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

_{What is name of hydrated variety of quartz?}

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Rose quartz

Smokey quartz

Silica

Opal

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

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

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neutral

amphoteric

acidic

alkaline

Fluorine is largely used in

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rocket fuels

making Teflon

making freon

All

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