Question # 1

Which of the following is the second anciently known metal.

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Nickel

Copper

Gold

Silver

All halogens exist as covalent molecules.

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Monoatomic

Daitomic

Triatonic

Tetra atomic

Which of the following hydroxides is most stable.

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Mg (OH)2

Ca(OH)2

Sr (OH)2

Ba (OH)2

Sodium react more vigorously than lithium because.

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It is a metal

It has higher atomic mass

It is more electronegative

It is more electropositive

The acetylene molecule contain a

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Single bond

Double bond

Triple bond

Co ordinate bond

Example of inter molecular H-bonding is

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NH3 and H2O

HF

CH3COOH

All of abvoe

Which of the following is strongest reducing agent.

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Be

Mg

Ca

Sr

How pig iron is usually obtained from

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iron pyrite

Limonite

Hematite

Siderite

Finely divided iorn combines with CO to give

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Fe(CO)3

Fe2 (CO)9

F33(CO)12

Fe(CO)6

Xe reacts directly with

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O2

Cl2

F2

Br2

The structure of SO2

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Linear

Angular

V-shaped

Planner

In group 17, the element with highest first ionization enthalpy belongs to.

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Period 1

Period 2

Period 7

Period 6

If steel is heated to a temperature well below red heated and is then cooled slowly the process is called.

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Annealing

Quenching

Tempering

Nitriding

How many unpaired electron are there in a strong field iron (II) octahederal compled.

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0

1

2

4

Inert pair effect is that

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When an element shows incertness in chemical combination

When higher oxidation state is more stable than lower oxidation state

When an elecrron pair is present on the atom of an element

When two s -electrons or outermost shell remain paired and do not participate in bonding.

Which of the following is an example of super octet molecules.

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C1F3

IF7

PCl5

All the three

Which one of the following does not exhibit paramegnetion.

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NO

NO2

CiO2

CIO-2

Compounds formed when noble gasses get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called.

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Interstitial compounds

Hydrates

Clathrates

Picrates

Coordination compound show

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Structural isomerism

Stereo isomerism

Both A and B

None of above

Xenan hexaflouride at 47.7 ^oC is

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Colorless solid

yellow solid

Yellow liquid

Colorless liquid

Acid rain effects

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Human being

Crops

Aquatic life

All above

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