Question # 1

What is bond order.

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Number of unpaired electrons

Number of paired electrons

Number of electrons present in antibonding molecular orbital

Number of bond formed between two atoms after overlap

The carbon atom is C2H4 is.

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sp3 hybridized

sG2 hybridized

Sp hybridized

dsG2 bybridized

Which one of the following molecules is paramagnetic.

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H2

He

N2

O2

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

The bond order of N2 molecule is.

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1

2

3

4

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 compound does not obey the octet rule.

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NH3

BCl3

H2O

CH4

Which of the following is a polar molecule

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CCl4

HCl

BF3

CO2

The molecule having zero dipole moment is.

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NH3

CHCl3

H2O

BF3

Which of the following has linear structure.

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CO2

NH3

CH4

H2O

The number of bonds in nitrogen molecules is.

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One pi and one sigma

One pi and two sigma

Thre sigma only

Two pi and one sigma

In a group of periodic table, ionization energy.

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Decreases

Increases

Remains same

First increases than increases

If we want to change O₂to O₂^-1The electron is to be placed in

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Those elements whose electronegativities are 1.2 and 3.2, react to form

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Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

Suppose a new element 'J' has discovered and has seven electron in the valence shell. Which statement about this element would be correct.

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It is monatomic

It form covalent bond with hydrogen

It forms stable positive ion

It forms covalent bond with group IA element

Fluorine molecule (F₂) is formed by the overlap of

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s - s orbital

s - p orbital

p - p head on overlapping of orbitals

p - p parallel overlapping of orbitals

The shielding effect of the inner electrons is responsible for

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Increasing ionization energy values

Decreasing ionization energy values

Increasing electron affinity

Increasing electonegativity

Which of the following has coordinate covalent bond.

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NH4

NaCl

HCl

AlCl3

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

Which statement is true about Na and Na+

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size of Na is greater than Na+

Size of Na is smaller than Na+

Both have equal size

Both have same properties

The number of bonds in nitrogen molecule is

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One o and oneπ

One o and twoπ

Three sigma only

Two o and twoπ

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Chemistry Fsc Part 1 Chapter 6 Online Test MCQs With Answers

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