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प्रश्न
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
उत्तर
Calcium carbonate – CaCO3
These droplets were present in the air as moisture which got condensed on the cooler walls of a glass tumbler. This shows the presence of water vapours in air.
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संबंधित प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
The capacity of air to hold moisture depends upon the ______ of the air.
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
Name a device which uses wind energy to generate electricity.
What should be done if the clothes of a person catch fire accidentally? Why?
What is global warming?
In the boxes of Column, I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II
| Column I | Column II | ||
| (a) | DILLMWIN | (a) | |
| (b) | YNOGXE | (b) | |
| (c) | MESKO | (c) | |
| (d) | TUDS | (d) | |
Match the items of Column I with the items of Column II
| Column-I | Column-ll | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of airflow |
| (e) | Wind | (v) | Prevent dust particles |
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
