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.
The action of zinc on an acid produces ...
Which of the following gives a precipitate when treated with NaOH solution? ...
An element Z, contained 90% of 168Z and 10% of Z1818 its relative atomic mass is?...
Which of the following types of reactions takes place between C2H6 and the halogens? ...
The gas given off when NH4 Cl is heated with an alkali is...
What is the mass number of an element having 20 neutrons, 15 protons and 15 electrons? ...
Chlorine water is used as a bleaching agent because it is ...