Advertisements
Advertisements
प्रश्न
Indicate whether the following statement is true or false:
All elements are artificially prepared
पर्याय
True
False
उत्तर
False
Correct Statement: All elements are made up of a limited number of basic substances
APPEARS IN
संबंधित प्रश्न
Define: Elements
State four differences between compounds and mixtures.
Give two examples of the following.
Non-metals which are solids
State the number of atoms of C6H12O6
Indicate whether the following statement is true or false:
Noble gases are high reactive
Complete the statement with the correct words.
_______ are chemicals which are hydroxide (or oxides) of ______ eg. sodium hydroxide.
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
