Download App

Air and Atmosphere — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAir and Atmosphere2 Marks
Question
Why is oxygen collected by downward displacement of water?
✓

Answer

Since the water is displaced downward by the gas collecting in the jar, the process is called downward displacement of water. The reasons are :
  1. Oxygen is only slightly soluble in water. Therefore, it can be collected over water without fear of excessive dilution.
  2. Oxygen is slightly heavier than air, so it cannot be collected over air.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[2 Mark Question Answer]" from Air and Atmosphere→Air and Atmosphere — all question types→CHEMISTRY STD 7 question papers→ICSE Board STD 7 question papers→ICSE Board question paper generator→

Similar questions

What is a chemical equation ?
→
Define the terms : Alkali
→
The formula of the nitride of a metal $X$ is $XN.$ State the formula of its $a.$ Chloride $b.$ Carbonate.
→
Define the following :Matter
→
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
→
complete chemical equation balance them : $\text{Mg} + \text{O}_2 \rightarrow $ __________
→
Write one of the reaction for each of the following characteristics :Change of smell
→
Name the different types of chromatographic techniques.
→
Name the main components of air.
→
State three uses of water vapour in the air.
→