opposite
The gas usually causing explosions in coal mines is-
Which of the following is the most reactive element in the Periodic table?
What is the atomic number of silicon, a component of quartz?
Hydrogen exhibits properties similar to which groups in the periodic table?
What type of extrinsic semiconductor has electrons as the majority charge carriers?
The chemical name of the Vitamin B6 is
How many carbon atoms are present in a molecule of propene?
The term Fire Ice is used for ___?
Hydrogen was discovered by?
Quartz is a crystalline form of which substance?
