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.
Which of the following is NOT correct test for the named organic compound in each case? ...
2SO2(g) + O2(g) \( \iff \)2SO3(g) \( \bigtriangleup H = -395.7kJmol^{-1} \) In the reaction ab...
In the diagram, the function of the concentrated H2SO4 is to?...
Consider the following elements and their electronic configurations W: 1s22s2 X: 1s 22s22p6 Y: 1s...
What is the chemical symbol for Vanadium? ...
The most efficient absorber of ultraviolet radiation in the atmosphere is ...