Question # 1

Stainless steel contains.

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Fe + Cr+ Ni

Fe + Ni + Cu

Fe + Cr+ Cu

Cu + C + Ni

The three isotopes of hydrogen differ from one another in

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Atomic number

Number of protons

Nuclear charge

Nuclear mass

The correct order of second ionization potential of carbon , nitrogen, oxygen and fluorine is.

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C > N > O > F

O > N > F > C

O > F > N > C

F > O > N > C

Metals are

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Transparent

Tranalucant

Opaque

None of above

Finely divided iron combines with CO to give.

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Fe(CO)5

Fe2(CO)9

Fe(CO)12

Fe(CO)6

Metallic magnesium is obtained by

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Reduction of MgO with Coke

Electrolysis of an aqueous solution of MgCl2

Electrolysis of molten MgCl2

Displacement of magnesium by iron form MgCl2 solution.

The pH of the tears is

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7.0

7.4

7.8

8.2

Which one of the following statement is incorrect in relation to ionization enthalpy.

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Ionization enthalpy increase for each successive electron

The greatest increase in ionization enthaly is experienced on removal of electron from core noble gas configuration

End of the valence electron is marked by a big jump in ionization enthalpy

Removal of electron from orbitals bearing lower value to easier than from orbital having highest n value.

Cryolite is used in the electrolytic extraction of aluminium to.

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Obtain more aluminium

Reduce alumina

Protective electrodes

Dissolve bauxite and increase the electrical conductivity

An electron has types of motion

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Spin motion

Orbital motion

Both A and B

None of above

Consider the coordination compound Na2[Pt(CN)4] the Lewis and is

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[Pr(CN)4]2

Na+

Pt

Pt2+

White Phosphorus is kept under

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Cold water

Ammonia liquor

Ethanol

Kerosene

Copper occurs in nature as.

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Native

Combined

Both native and combined

None of the above

The state of hybridization of carbon in CO2 is

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sp2

sp

sp3

dsp2

Lithium shows diagonal relationship with

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Beryllium

Sodium

Magnesium

Calcium

A stable molecule is a group of atoms held together by

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Chemical forces

Physical forces

Valence force

None of above

Which of the following elements has the highest density.

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Mg

Na

K

Rb

Which of the following molecule contains two dative bonds according to Lewis structure.

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NH3

SO3

PCl5

BF3

Lithum silicide reacts with concentrated hydrochlric acid to give lithium chlride along with.

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H2 and SI

Si H 4 gas

Disilane gas

Si3H8

Main constituent of all inorganic matter

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Carbon

Silicon

Tin

Lead

One of the best fluorinating agent is

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XeF2

XeF4

XeF6

None of above

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