Advertisements
Advertisements
Question
Give reason: Graphite is used to make a lead of the pencils.
Advertisements
Solution
Graphite leaves mark on the paper and makes it black.
APPEARS IN
RELATED QUESTIONS
Classify the following substances into compounds and mixtures:
Tick the most appropriate answer.
The constituents of a mixture are present in
- a fixed ratio
- a variable ratio,
- the ratio of 2: 1
- none of these
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
Define: Formula
Find the atomicity of the Following molecule:
Carbon Monoxide
Tick (√) the correct alternative from the choice given for the following statement.
The most abundant elements in the universe are
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
Higher Order Thinking Skills.
In the diagram given below, the circle, square and triangle represent the atoms of different elements.
Identify all combinations that represent
- molecule of a compound
- molecule of an element consisting of two atoms
- molecule of an element consisting of three atoms
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?
Give an account of elements known to us.
