Question # 1

Which alkaline earth metal makes peroxide?

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Ba

Be

Mg

Ca

The element which exhibits maximum catenation property is

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C

Pb

Ge

Sn

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

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Na

Sr

Cs

Rb

Compared with alkaline earth metals, the alkali metals exhibit.

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lower ionization energies

greater hardness

high boiling point

smaller ionic radii

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

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Rose quartz

Smokey quartz

Silica

Opal

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 compound gives carbon when heated with conc. H2SO4.

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Starch

Ethyl alcohol

Oxalic acid

Formic acid

Which of the following does not give flame test?

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Li

Ba

Mg

Sr

Which of the following elements is most metallic

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Bi

sb

As

P

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

What is the formula of clay?

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Asbestos

Talc

H2Al2(SiO4)2.H2O

Na2SiO3

The reaction between Cu and conc. H2SO4 produces

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Cu+2

SO₂

SO₃

H₂

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

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Mg

K

Be

Li

Asbestos is commonly used in making

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wall board

black board

soft board

hard board

Which pair of following pair is metalloid?

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Antimony and bismuth

Phosphorous and arsenic

Nitrogen and phosphorous

Arsenic and antimony

What is the formula of talc or soapstone?

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Na2B4O7.10H2O

H2Mg3(SiO3)4

Cu2S

NaNO3

Elements of group IV-A are

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neither strongly electropositive nor strongly electronegative

strongly electropositive

strongly electronegative

none of these

Plaster of Paris is obtained from

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marble

bauxite

gypsum

limestone

Which element of group V-A and VII-A does not use d-orbital?

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Nitrogen

Sulphur

Arsenic

Chlorine

About 25% of earth crust mass is made up of element

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Oxygen

Silicon

Aluminium

Aluminates

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

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