What makes the earth’s atmosphere a heterogeneous mixture?
Earth’s atmosphere is a mixture of different gases, it consists of 21% oxygen, 78% nitrogen, 0.93% argon and 0.03% CO2 along with other gases making up the remaining percentage. The composition varies at different places and times thus the Earth’s atmosphere is a heterogeneous mixture.
To show that zinc is a more active metal than copper, the correct procedure is to:
Add dilute nitric acid on strips of both the metals.
Observe transmission of heat through strips of zinc and copper.
Prepare a solution of zinc sulphate and hang a strip of copper into it.
Prepare a solution of zinc sulphate and hang a strip of copper into it.
A yeast cell in which budding occurs was seen to have:
one bud cell
two bud cell
three bud cell
three bud cell
On adding NaHCO3 to acetic acid, a gas is evolved which turns lime water milky due to the formation of:
Calcium bicarbonate
Calcium hydroxide
Calcium carbonate
Calcium carbonate
Acetic acid solution turns:
blue litmus red
red litmus blue
blue litmus colourless
blue litmus colourless
The color of an aqueous solution of zinc sulphate as observed in the laboratory is:
Green
Yellow
Blue
Blue
