Chemistry Test

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Chemistry Test - 22

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Weekly Quiz Competition

Question 1
1 / -0

What is the value of 200 ft3/min in mile3/day?

A
0.95×10-6

B
1.95×10-6

C
0.95×106

D
1.95×106

Solution

1 mile = 5280 ft and 1 day = 24*60 minutes.
Question 2
1 / -0

An atom differs from its ion in which among the following ?

A
Mass number

B
Atomic number

C
Neutrons

D
Number of protons

Solution

When an atom loses or gains electrons its forms its corresponding ion, and hence it differs in proton number.
Question 3
1 / -0

Which one is an incorrect conversion

A
1 inch = 2.54 cm

B
1 mile = 5280 ft.

C
1 ft. = 12 inch

D
None of the mentioned

Solution

All above mentioned are correct conversions of length.
Question 4
1 / -0

The energy which must be transferred to any atom to dislodge an electron is called?

A
Free energy

B
Ionization Energy

C
Quantum mechanical energy

D
Dissociation Energy

Solution

Ionizationenergyisenergythatmust be transferred to any atom to dislodge(remove) anelectron.
Question 5
1 / -0

What is the range of tensile strength, exhibited by fibres?

A
300-3,000

B
4,000-15,000

C
20,000-150,000

D
5,000-10,000

Solution

Ans (c) 20,000-150,000

Fibres possess highest tensile strength in comparison to other polymers.
Question 6
1 / -0

What is the product of following polymerization reaction?

A
─[─NH─R─CO─]_n

B
─[─R─NH─CO─]_n

C
─[─NH─R─CO─]_n-1

D
one of the mentioned

Solution

The lactam group polymerizes to give ─[─NH─R─CO─]_n product, consisting of amide group.
Question 7
1 / -0

Which among the following is not an example of hydrogen bond?

A
H₂0

B
Liquid HCl

C
NH₃

D
CHCl₃

Solution

There is no hydrogen bond in liquid HCl since the bond breaks up when dissolved in water.
Question 8
1 / -0

What is the hybridization of sulphur in H₂S?

A
sp

B
sp²

C
sp³

D
sp³d

Solution

S has two pairs of electrons and two atoms bonded to H with a total of 4 electrons and hence it has a hybridization of sp^3.
Question 9
1 / -0

Consider a reaction of polymer formation by condensation polymerization, completed in n-steps, with the liberation of a certain byproduct. How many total molecules of byproduct are released as a result of complete reaction?

A
n+1

B
n

C
n-1

D
n/2

Solution

At each step of a condensation polymerization reaction, one byproduct molecule is released. So a total of n molecules are liberated.
Question 10
1 / -0

3.5 mile is equal to

A
18480 ft.

B
2217600 in.

C
56327 m

D
All of the mentioned

Solution

1 mile = 5280 ft., 1 ft. = 12 in., 1 in. = 2.54 cm.

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Chemistry Test - 22

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Chemistry Test - 22

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Question 1

0.95×10-6

1.95×10-6

0.95×106

1.95×106

Solution

Question 2

Mass number

Atomic number

Neutrons

Number of protons

Solution

Question 3

1 inch = 2.54 cm

1 mile = 5280 ft.

1 ft. = 12 inch

None of the mentioned

Solution

Question 4

Free energy

Ionization Energy

Quantum mechanical energy

Dissociation Energy

Solution

Question 5

300-3,000

4,000-15,000

20,000-150,000

5,000-10,000

Solution

Question 6

─[─NH─R─CO─]n

─[─R─NH─CO─]n

─[─NH─R─CO─]n-1

one of the mentioned

Solution

Question 7

H20

Liquid HCl

NH3

CHCl3

Solution

Question 8

sp

sp2

sp3

sp3d

Solution

Question 9

n+1

n

n-1

n/2

Solution

Question 10

18480 ft.

2217600 in.

56327 m

All of the mentioned

Solution

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─[─NH─R─CO─]_n

─[─R─NH─CO─]_n

─[─NH─R─CO─]_n-1

H₂0

NH₃

CHCl₃

sp²

sp³

sp³d