Advertisements
Advertisements
प्रश्न
Indicate whether the following statement is true or false:
Molecules combine to form atoms
पर्याय
True
False
Advertisements
उत्तर
False
Correct Statement: Atoms combine to form a molecule.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
Differentiate between the following.
Filter Paper and Alum
Give one use of the following substance:
Brass
Answer the following question:
Why are copper and aluminium used to make electric wires?
Differentiate between the terms –
elements, compounds & mixtures.
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 ___________
Give an example of two liquids that form heterogeneous mixtures.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
There are ______ number of known elements.
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.
