Advertisements
Advertisements
प्रश्न
Indicate whether the following statement is true or false:
Ozone is a triatomic molecule
विकल्प
True
False
उत्तर
True
APPEARS IN
संबंधित प्रश्न
Define a pure substance. How many types of pure substances do you know?
Select the correct answer from the choice given below.
An element which is a poor conductor of heat
Write the names of elements from the following symbol:
Si
Write an answer to the following question in your own words.
Which elements (metals and non-metals), compounds and mixtures do we use in our day-to-day life?
Define the term ‘compound’. In the compound carbon dioxide – the elements carbon & oxygen are combined in a fixed ratio. Explain.
State why brass is considered as a homogenous mixture while a mixture of iron & sulphur – heterogenous.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
Differentiate metals and non-metals.
Match the following:
| 1. | Co2 | a. | Robert Boyle |
| 2. | Sulfur | b. | Making mobile phones |
| 3. | Element | c. | triatomic molecule |
| 4. | Gallium | d. | Polyatomic molecule |
Complete the table:
| Element | Latin Name | Symbol |
| Mercury | ______ | Hg |
| Lead | Plumbum | ______ |
| Iron | ______ | Fe |
| Potassium | Kalium | ______ |
