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1. Which of the following is a strong acid?

a) HI

b) HF

c) H3PO4

d) H2CO3

e) HClO2

2. Which of the following is a weak acid?

a) HI

b) HCl

c) H3PO4

d) HNO3

e) HClO4

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?