Question # 1

Among the alkaline earth metals the element forming predominantly covalent compounds is

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Be

Mg

Sr

Calcium

Wt. of 112 ml of oxygen at NTP on liquification would be

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0.32 g

0.64 g

0.16 g

0.96 g

Which of the following statements is most appropriate about effective nuclear charge? It depends upon

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The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding

Sea weeds are important source of

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Iron

Chlorine

Iodine

Bromine

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

For the carbylamine reaction we need hot alc. KOH and

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Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

Aluminothermy used for on the spot welding of large iron structure is based upon the fact that

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As compared to iron, aluminium has greater affinity for oxygen

As compared to aluminium, iron has greater affinity for oxygen

Refraction between aluminium and oxygen is endothermic

Reaction between iron and oxygen is endothermic.

In crystal structure of sodium chloride, the arrangement of CI^-ions is

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Fcc

Both Fcc and bcc

Bcc

None of these

Al is more reactive than Fe but Al is less easily corroded than Fe because

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It is a noble metal

oxygen forms a protective reaction easily with water

Iron undergoes reaction easily with water

Fe form mono and divalent ions.

Which of the following units represents largest amount of energy?

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Calorie

Joule

Erg

Electron vol.

White lead is

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Basic lead acetate

Acidic lead carbonate

Basic lead carbonate

Basic lead hydroxide

Inter molecular forces in solid hydrogen are

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Covalent forces

Van der Waal forces or London dispersion forces

Hydrogen bonds

All of these.

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

An electrolyte

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Forms complex ions in solution

Gives ions only when electricity is passed

Possesses ions even in solid state

Gives ions only when dissolved in water

The last orbit of argon would have electrons

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8

18

2

6

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