Chemistry Test 51

Result

Chemistry Test 51

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Weekly Quiz Competition

Question 1
4 / -1

The boiling point of an azeotropic mixture of water-ethanol is less than that of both water and ethanol. Then :-

A
The mixture will show negative deviation from Raoult's law.

B
The mixture will show positive deviation from Raoult's law

C
The mixture will show no deviation from Raoult's law

D
This mixture considered as colloidal solution.
Question 2
4 / -1

If S + O₂ —→ SO₂   ; ΔH = –298.2 kJ mol^–1
SO₂ + ½O₂ —→ SO₃   ; ΔH = –98.7 kJ mol^–1
SO₃ + H₂O —→ H₂SO₄  ; ΔH = –130.2 kJ mol^–1
H₂ + ½O₂ —→ H₂O   ; ΔH = –287.3 kJ mol^–1

Then the enthalpy of formation of H₂SO₄ at 298 K is -

A
–814.4 KJ

B
–650.3 KJ

C
–320.5 KJ

D
–433.5 KJ

Solution

ΔH = ΔH₁ + ΔH₂ + ΔH₃ + ΔH₄
Question 3
4 / -1

Dissolving metallic Zn in excess of NaOH produces :-

A
Na₂ZnO₂

B
Zn(OH)₂

C
ZnO

D
Zn(OH)₂ & Na₂ZnO₂

Solution

NaOH + Zn —→ Na₂ZnO₂ + H₂
Question 4
4 / -1

Teflon is polymer of :-

A
Tetrafluoro ethene

B
Tetrafluoro ethane

C
Acrylonitrile

D
Caprolactum