Chemistry Test 93

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Chemistry Test 93

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Weekly Quiz Competition

Question 1
4 / -1

Incorrect statement about amorphous solids is ?

A
do not have sharp melting point

B
anisotropic in nature

C
are super cooled liquids

D
do not have definite heat of fusion
Question 2
4 / -1

For first order reaction A — → 2B initial concentration of A was 0.8 M and after 1 min. conc. of [B] was 0.8 M. Half-life period for reaction is :

A
60 sec.

B
120 sec.

C
80 sec.

D
30 sec.
Question 3
4 / -1

Which of the following species has most thermal stability ?

A
H–F

B
H–I

C
H–Cl

D
H–Br
Question 4
4 / -1

Select the correct statement :-

A
In a mixture of KMnO₄ & H₂C₂O₄, KMnO₄ decolorises faster at higher temperature than lower temperature

B
A catalyst participate in a chemical reaction by forming temporary bonds with the reactant resulting in an intermediate complex

C
In collision theory only activation energy determine the criteria for effective collision

D
option 1 and option 2 are correct
Question 5
4 / -1

Potassium crystallizes in a body centred cubic lattice with edge length a = 5.0Å. Then choose the correct statements in given option :-

A
The number of nearest neighbour to any K atom is 8

B
The number of next nearest neighbour to any K atom is 6.

C
Distance between nearest neighbours is 4.33 Å

D
All are correct

Solution

Distance between nearest neighbour = √3a/2 ( = 8 in number). Distance between next nearest neighbour = a ( = 6 in number)
Question 6
4 / -1

A homodiatomic molecule 'X₂' have bond order '1', then which of the following prediction(s) will be correct for 'X₂' :-

A
The difference of total number of bonding and antibonding e^– is 2

B
Molecule can not be odd electron molecule

C
Total number of bonding electrons is more than antibonding electrons

D
All are correct
Question 7
4 / -1

Which of the following orders incorrect between PCl₃F₂ and PCl₂F₃:-

A
PCl₃F₂ > PCl₂F₃ (Dipole moment)

B
PCl₃F₂ > PCl₂F₃ (Total number of lone pair)

C
PCl₃F₂ > PCl₂ F₃ (Maximum number of atom in one plane)

D
All are correct

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Chemistry Test 93

Result

Chemistry Test 93

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SHARING IS CARING

Question 1

do not have sharp melting point

anisotropic in nature

are super cooled liquids

do not have definite heat of fusion

Question 2

60 sec.

120 sec.

80 sec.

30 sec.

Question 3

H–F

H–I

H–Cl

H–Br

Question 4

In a mixture of KMnO4 & H2C2O4, KMnO4 decolorises faster at higher temperature than lower temperature

A catalyst participate in a chemical reaction by forming temporary bonds with the reactant resulting in an intermediate complex

In collision theory only activation energy determine the criteria for effective collision

option 1 and option 2 are correct

Question 5

The number of nearest neighbour to any K atom is 8

The number of next nearest neighbour to any K atom is 6.

Distance between nearest neighbours is 4.33 Å

All are correct

Solution

Question 6

The difference of total number of bonding and antibonding e– is 2

Molecule can not be odd electron molecule

Total number of bonding electrons is more than antibonding electrons

All are correct

Question 7

PCl3F2 > PCl2F3 (Dipole moment)

PCl3F2 > PCl2F3 (Total number of lone pair)

PCl3F2 > PCl2 F3 (Maximum number of atom in one plane)

All are correct

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In a mixture of KMnO₄ & H₂C₂O₄, KMnO₄ decolorises faster at higher temperature than lower temperature

The difference of total number of bonding and antibonding e^– is 2

PCl₃F₂ > PCl₂F₃ (Dipole moment)

PCl₃F₂ > PCl₂F₃ (Total number of lone pair)

PCl₃F₂ > PCl₂ F₃ (Maximum number of atom in one plane)