200
Carboxylic acid is an organic ________ containing -COOH.
A _______ made up of ethene molecules.
There's no magic _______ for success.
A reaction in which an ____ or molecule replaces another in a compound.
The _________ on that car is broken.
This truck's engine runs on diesel ____.
_______ cause when rocks and boulders transported by waves bump tino each other and break up into smaller pieces.
It takes the Earth a year to _____ the sun.
Cation is an ion discharged at the cathode during ____________.
Quartz is a hard transparent _______.
We can be environmentally responsible by _________ our waste.
The 'gluing together' of different sediments to make ___________ rock.