Chemistry Test 91

Result

Chemistry Test 91

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Weekly Quiz Competition

Question 1
4 / -1

P_A and P_B are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If X_A  represents the mole fraction of component A, the total pressure of the solution will be.

A
P_B + X_A (P_B – P_A)

B
P_B + X_A (P_A – P_B)

C
P_A + X_A (P_B – P_A)

D
P_A + X_A (P_A – P_B)

Solution

P_T = P_AX_A + P_BX_B
       = P_AX_A + P_B(1 – X_A)
       = P_AX_A + P_B – P_BX_A
P_T = P_B + X_A (P_A – P_B)
Question 2
4 / -1

Water should boil at 90°C at pressure :-

A
= 1atm

B
> 1 atm

C
< 1 atm

D
any of these
Question 3
4 / -1

Which is most soluble gas in liquid?

A
H₂

B
He

C
N₂

D
CO₂
Question 4
4 / -1

Which is not anomalous pair of element in the Mendeleev's periodic table ?

A
Ar, K

B
Co, Ni

C
Te, I

D
Al, Si
Question 5
4 / -1

Which electronic configuration belong to p-block :-

A
[Xe]4f¹⁴5d¹⁰6s²6p⁴

B
[Xe]4f¹⁴5d¹6s²

C
[Xe]4f¹⁴5d¹⁰6s²

D
[Xe]4f¹⁴5d⁷6s²
Question 6
4 / -1

The correct option regarding the following electronic configuration : –

A
[Rn] 7s² 6d² – d block

B
[Xe] 6s² 4f¹⁴ 5d¹ – f block

C
[Xe] 6s² 4f¹⁴ 5d¹⁰ 6p¹ – d block

D
[Xe] 6s² 4f¹ 5d¹ – d block

Solution

[Rn] 7s² 6d² – f-block
[Xe] 6s² 4f¹⁴ 5d¹ – f-block
[Xe] 6s² 4f¹⁴ 5d¹⁰ 6p¹ – p-block
[Xe] 6s² 4f¹ 5d¹ – f block
Question 7
4 / -1

Which of the following radius order is not present due to lanthanoid contraction?

A

B

C

D

Solution

Transitional contraction.
Question 8
4 / -1

Which of the following species are isoelectronic but the first one is large in size :-

A
S^–2, O^–2

B
Cl^–, S^–2

C
N^–3, P^–3

D
Cl^–, K⁺

Solution
Question 9
4 / -1

Correct order of atomic radius on given species if :-

A
F > C > Br > Ge

B
Br > Ge > C > F

C
Ge > Br > C > F

D
Br > C > Ge > F

Solution
Question 10
4 / -1

If the Z_eff of Na is x then Ca will be :-

A
x

B
x + 0.35

C
x + 0.65

D
x + 1.05

Solution

Z_effof Na = x