Brass is an alloy of:
Which gas does yeast produce, when it is activated?
Which gas does yeast produce, when it is activated?
AOxygen
BHydrogen
CNitrogen
DCarbon dioxide
Saturday, January 25, 2020
Sunday, January 19, 2020
The most important ore of aluminum is ________.
The most important ore of aluminum is ________.
ABornite
BBasalt
CBauxite
DPyrolusite
Galvanised iron sheets have a coating of:
Galvanised iron sheets have a coating of:
ANickel
BCopper
CZinc
DChromium
The gases used for welding include:
The gases used for welding include:
AOxygen and Methylene
BOxygen and Acetylene
CArgon and Nitrogen
DOxygen and Benzene
