Question # 1

In which one of the following pairs do the molecule have similar shape.

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BF3 and AlCl3

CO2 and H2O

CH4 and PH3

NH3 and BCl3

Which pair are iso electronic.

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Na+ and Cl-

Na+ and Mg+2

N-3 and P-3

H+ and H-

Which of the hydrogen halides has the highest percentage of ionic character

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HF

HBr

HCI

HI

The H - H Bond energy in KJ mole -1 is.

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346

436

463

336

Which of the following molecules have unpaired electrons is the bonding molecular orbitals.

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N2

O2

B2

F2

Carbon atom in methane in hybridized.

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sp3

Sp2

Sp

dsp3

As compared to pure atomic orbitals the hybrid orbitals have.

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Low energy

High energy

Same energy

None of these

Percentage ionic character of HF is.

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100%

80%

43%

57%

Which of the following is true for ionic compounds

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They are non-electrolytes in the molten state

They have bonds which are directional

They conduct electricity in solid state

They are generally more soluble in polar solvents than in non-polar solvents

Which of the following has coordinate covalent bond.

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NH4

NaCl

HCl

AlCl3

The tendency of an tom to attract shared pair of electron towards itself is called its.

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Ionization energy

Electronegativity

Electron affinity

dipole moment

In which of the following Paris, do the elements form a compound by sharing electrons.

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carbon and chlorine

Lithium and iodine

Neon and oxygen

Potassium ad bromine

Which has zero potential energy.

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When H atom is independent

When two H atoms combine to form H2 molecule

When two H atoms super impose to each other

When two H atoms have weak attraction between them

Which one of the following correctly describe the shape of NH3 molecules.

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tetrahedral

Pyramidal

Angular

Square planar

The number of bonds in oxygen molecules.

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One sigma and One pi

One sigma and two Pi

Three sigma only

Two sig and two pi

The carbon atom is C2H4 is.

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sp3 hybridized

sG2 hybridized

Sp hybridized

dsG2 bybridized

In a group of periodic table, ionization energy.

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Decreases

Increases

Remains same

First increases than increases

Dipole Moment of H2O is.

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1.61 D

1.85 D

0.95 D

1.49 D

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Chemistry Fsc Part 1 Chapter 6 Online Test MCQs With Answers

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