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प्रश्न
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
पर्याय
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Chalk
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संबंधित प्रश्न
Define: Compounds
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
State four differences between compounds and mixtures.
Define: Molecule
Name: Three different forms of carbon
Name A substance used as an insulator.
Give one use of the following substance:
Iron
Find the atomicity of the Following molecule:
Calcium Chloride
Fill in the blank
A diatomic gaseous element is _______.
Indicate whether the following statement is true or false:
Metals reflect light and are good conductors of electricity
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Complete the statement given below by filling in the blank with the correct word.
The basic unit of an element is an __________.
Select the correct answer from the choice given below.
The unreactive non-metallic element
Select the correct answer to the statement given below:
A non-metal which exists in the liquid state.
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
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 two example of elements.
______ is a mixture of gases.
