chem tutor

The presence of ____metal produce hard water?
a) calcium b) sodium
c)hydrogen

___is a crystalline from of carbon?
a) graphite b) coke c)tar

____is a product from amorphous carbon
a) coal tar b) charcoal c) coal

___is used for cutting metals?
a) graphite. b)iron c) diamond

1)___is used for domestic heating?
a)coal. b)tar c) graphite

___ is a quicklime?
a)cak
b)cacl
c)cao
give your answer in the comments section

Limestone is a_?
a)cacl
b)caco2
c)caco3
give your answer in the comments section

Chlorine has _ colour?
a) yellow
b) green
c) blue
give your answer in the comments section