Chemistry Test 55

Result

Chemistry Test 55

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The difference between n^th and (n + 1)^th Bohr's radius of H atom is equal to its (n – 1)^th Bohr's radius. The value of n is :-

A
1

B
2

C
3

D
4
Question 2
4 / -1

Approximate atomic weight of an element is 26.89. If its equivalent weight is 8.9, the exact atomic weight of element would be :-

A
26.89

B
8.9

C
17.8

D
26.7
Question 3
4 / -1

pH of water is 7.0 at 25°C. If water is heated to 70°C, the:-

A
pH will decrease and solution becomes acidic

B
pH will increase

C
pH will remain constant as 7

D
pH will decrease but solution will be neutral

Solution

On heating water K_w increases and thus pH, scale for neutrality changes from 7 to some lower values i.e. 6.8 or 6.9 depending upon K_w values.
Question 4
4 / -1

Which relationship is incorrect ?

A
∆H = ∆U + ∆n_gRT (for reaction)

B
∆G = – T∆S

C
∆G° = –2.303 RT log K

D
W = + 2.303 nRT log V₁/ V₂ (for reversible isothermal process)

Solution

ΔG = –TΔS_Total
Question 5
4 / -1

The bond dissociation energies of CH₄ and C₂H₆ respectively are 360 and 620 kcal mol^–1. The C–C bond energy would be :-

A
260 kcal mol^–1

B
180 kcal mol^–1

C
130 kcal mol^–1

D
80 kcal mol^–1
Question 6
4 / -1

When 1 mole of KMnO₄ reacts with H₂C₂O₄ in acidic medium number of moles of H₂C₂O₄ are :-

A
5

B
2

C
2 / 5

D
5 / 2
Question 7
4 / -1

Which is correct about real gas :

A
Pressure of real gas is higher than ideal gas

B
volume of real gas is lower than ideal gas

C
Real gas follows ideal gas equation at very low pressure and high temperature.

D
Real gas behaves as ideal gas at high pressure and low temperature
Question 8
4 / -1

Each unit cell of NaCl consists of 14 Cl^– ions and

A
13 Na⁺

B
14 Na⁺

C
6 Na⁺

D
All are wrong
Question 9
4 / -1

Emulsion can be broken into liquid constituents by all except.

A
Heating

B
Freezing

C
Centrifuging

D
Emulsifier

Solution

Emulsibier stabilizes emulsion.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Chemistry Test 55

Result

Chemistry Test 55

Score

-

Rank

-

SHARING IS CARING

Question 1

1

2

3

4

Question 2

26.89

8.9

17.8

26.7

Question 3

pH will decrease and solution becomes acidic

pH will increase

pH will remain constant as 7

pH will decrease but solution will be neutral

Solution

Question 4

∆H = ∆U + ∆ngRT (for reaction)

∆G = – T∆S

∆G° = –2.303 RT log K

W = + 2.303 nRT log V1 / V2 (for reversible isothermal process)

Solution

Question 5

260 kcal mol–1

180 kcal mol–1

130 kcal mol–1

80 kcal mol–1

Question 6

5

2

2 / 5

5 / 2

Question 7

Pressure of real gas is higher than ideal gas

volume of real gas is lower than ideal gas

Real gas follows ideal gas equation at very low pressure and high temperature.

Real gas behaves as ideal gas at high pressure and low temperature

Question 8

13 Na+

14 Na+

6 Na+

All are wrong

Question 9

Heating

Freezing

Centrifuging

Emulsifier

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

∆H = ∆U + ∆n_gRT (for reaction)

W = + 2.303 nRT log V₁/ V₂ (for reversible isothermal process)

260 kcal mol^–1

180 kcal mol^–1

130 kcal mol^–1

80 kcal mol^–1

13 Na⁺

14 Na⁺

6 Na⁺