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प्रश्न
State five different characteristics of compounds.
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उत्तर
Five characteristics of a compound:
- Components in a compound are in a definite proportion.
- The compound is always homogenous [i.e. identical composition].
- Particles in a compound are of one kind.
- Compounds have a definite set of properties.
- Elements in the compound do not retain their original properties.
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संबंधित प्रश्न
Give two examples for the following: Metals
Fill in the blank
The most abundant element in the earth’s crust is _______.
Indicate whether the following statement is true or false:
All elements are artificially prepared
Tick (√) the correct alternative from the choice given for the following statement
A non-metal which is a good conductor of electricity.
Elements are classified into – Metals – Non-metals – Metalloids – Noble gases. State which of A, B, C, D is a –
1. Metallic element
2. Non-metallic element
3. Metalloid
4. Noble gas.
A: Is non-malleable, non-ductile & a poor conductor of electricity ___________
B: Has lustre, is malleable and ductile & a good conductor of heat ___________
C: Is unreactive and inert and present in traces in the air _________
D: Shows properties of both metals and non-metals ___________
Define the term ‘compound’. In the compound carbon dioxide – the elements carbon & oxygen are combined in a fixed ratio. Explain.
Select the correct answer from the choice given below to complete the sentence :
Compounds are ____________ in nature.
Elements are the______ form of pure substances.
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?
