Chemistry Test 43

Result

Chemistry Test 43

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Weekly Quiz Competition

Question 1
4 / -1

The quantum number not obtained from the Schrodinger’s wave equation is -

A
n

B
l

C
m

D
s

Solution

Schrodinger's wave equation not related to the direction of e^– so fourth quantum no. s not obtained.
Question 2
4 / -1

The set of quantum numbers not applicable for an electron in an atom is -

A
n = 1, l = 1, m = 1, s = + 1/2

B
n = 1, l = 0, m = 0, s = + 1/2

C
n = 1, l = 0, m = 0, s = – 1/2

D
n = 2, l = 0, m = 0, s = + 1/2

Solution

Because n ≠ l
n = 1, l = 1, m = 1, s = + ½ is not possible
Question 3
4 / -1

NH₃ and BF₃ combine readily because of the formation of -

A
a covalent bond

B
a hydrogen bond

C
a co-ordinate bond

D
an ionic bond

Solution

BF₃ is electron deficient (6e^–) compound so it accept 2e^– to attain stable configuration.
H₃N : → BF₃ (co-ordinate bond)
Question 4
4 / -1

The maximum covalency for p-block elements is equal to -

A
The number of unpaired p-electrons

B
The number of paired d-electrons

C
The number of unpaired s-and p-electrons

D
The actual number of s-and p-electrons in the outermost shell

Solution

Maximum covalency = s-&.p electrons in the outermost shell
Question 5
4 / -1

Water and ethanol form non-ideal solution with positive deviation from Raoult's law. This solution will have vapour pressure –

A
equal to vapour pressure of pure water

B
less than vapour pressure of pure water

C
more than vapour pressure of pure water

D
less than vapour pressure of pure ethanol

Solution

Due to positive deviation from Raoult's law. So ethanol and water escape easily showing higher vapour pressure than expected value.