Which of the following allotrope of carbon is a constitue...
Which of the following allotrope of carbon is a constituent of a lead pencil?
Graphite
Diamond
Lampblack
Soot
Correct answer is A
When an element exists in more than one crystalline form, those forms are called allotropes; the two most common allotropes of carbon are diamond and graphite.
Graphite is used in pencils and lubricants. It is a good conductor of heat and electricity. Its high conductivity makes it useful in electronic products such as electrodes, batteries, and solar panels.
Radon is used as a tracer in medical research because it ...
The spontaneity of a chemical reaction is determined by the change in the ...
When dust particles collide randomly in a beam of Sunlight, the phenomenon observed is known as ...
What is the sum of the oxidation numbers in a neutral compound? ...
An example of aromatic compound is? ...
The minimum amount of energy required for a reaction to take place is ...
Cu2S(g) + O2(g) → 2Cu + SO2(g) What is the change in the oxidation number of copper in the rea...
23490Th→23491Pa+X In the nuclear reaction above, X is...
The hydroxyl ion concentrated, (OH-), in a solution of sodium hydroxide of pH 10.0 is?...
Which of the following statements about phosphorus is NOT correct? ...