Write a method to separate a mixture of sand and potash alum. - Vidyadip

Question

Write a method to separate a mixture of sand and potash alum.

✓

Answer

Potash alum is soluble in water whereas sand is insoluble in water. The difference in their solubility is used to separate them. The mixture of sand and potash alum is dissolved in water, then it is filtered with the help of filter paper. Sand remains as residue on the filter paper while potash alum solution is obtained as filtrate. The filtrate is then evaporated to get crystals of potash alum.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Que-Ans (Each of 3 Mark )" from Is Matter Around Us Pure→Is Matter Around Us Pure — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Calculate the molecular masses of the following:

Hydrogen, $H_2$
Oxygen, $O_2$
Chlorine, $Cl_2$
Ammonia, $NH_3$
Carbon dioxide, $CO_2$

(Atomic masses:$ H = 1 u; O = 16 u; Cl = 35.5 u; N = 14 u; C = 12 u)$

The mass of sun is $2 \times 10^{30} \mathrm{~kg}$ and the mass of earth is $6 \times 10^{24} \mathrm{~kg}$. If the average distance between the sun and the earth be $1.5 \times 10^8 \mathrm{~km}$, calculate the force of gravitation between them.

A student thought that two bricks tied together would fall faster than a single one under the action of gravity. Do you agree with his hypothesis or not? Comment.

What were the drawbacks of Rutherford’s model of an atom?

Give one example each in which a force does $(a)$ positive work $(b)$ negative work, and $(c)$ zero work.

Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth $=6 \times 10^{24} \mathrm{~kg}$ and of the Sun $=2 \times 10^{30} \mathrm{~kg}$. The average distance between the two is $1.5 \times 10^{11} \mathrm{~m}$.

List any two differences between infectious and noninfectious diseases. Write any one example of each disease.

A object having a mass $2 \ kg$ and moving at $14 m / s$ collides with another object of mass $5 \ kg$ at rest and sticks to it. Find the speed of this combination.

Show by means of calculations that $5$ moles of $\mathrm{CO}_2$ and $5$ moles of $\mathrm{H}_2 \mathrm{O}$ do not have the same mass. How much is the difference in their masses?

You are provided with the seeds of gram, wheat, rice, pumpkin, maize and pea. Classify them whether they are monocot or dicot.