pottasium
barium
zinc
copper
Correct answer is D
No explanation has been provided for this answer.
Sodium hydroxide should be stored in properly closed containers because it?
readily asborbs water vapour to air
is easily oxidize by atmospheric oxygen
turns golden yellow when exposed to light
melts at a low temperature
Correct answer is A
NaOH pellets are deliquescent..so they easily absorb from the atmosphere when exposed
The major component of the slag from the production of iron is?
an alloy of calcium and iron
coke
impure iron
calcium trioxosilicate (IV)
Correct answer is D
Blast furnace slag is a nonmetallic coproduct produced in the process. It consists primarily of silicates, aluminosilicates, and calcium-alumina-silicates
Coal fire should not be used in poorly ventilated rooms because ?
of the accumulation of CO2 which causes dep sleep
it is usually too hot
of the acumulation of CO which causes suffocation
it removes most most of the gases in the rooms
Correct answer is C
No explanation has been provided for this answer.
Which of the following metals will liberate hydrogen from steam or dilute acid?
Copper
Iron
Lead
Mercury
Correct answer is B
No explanation has been provided for this answer.