States of Matter Test

Result

States of Matter Test - 5

Score
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Rank
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Weekly Quiz Competition

Question 1
1 / -0

A student forgot to add the reaction mixture to the round bottomed flask at 27 ^∘C , but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake, and using a pyrometer he found the temperature of the flask was 477 ^∘C. What fraction of air would have been expelled out?

A
0.6

B
0.42

C
0.5

D
0.67

Solution

Using ideal gas equation PV=nRT, at constant pressure and volume(here volume of container remains constant as it is open to atmosphere)
n₁T₁ = n₂T₂

n_2/n₁= 300/750 = 0.4

This is the fraction of air remaining in flask, so fraction of air expelled out =1- 0.4=0.6.
Question 2
1 / -0

Bose-Einstein Condensate have

A
High kinetic energy

B
Highest kinetic energy.

C
Low kinetic energy

D
Very low kinetic energy

Solution

Very low kinetic energy
Question 3
1 / -0

The colour of vapours formed on sublimation of iodine solid is

A
Purple (violet)

B
Colourless

C
Yellow

D
Orange

Solution

Purple (violet)