Advertisements
Advertisements
प्रश्न
Name the process which can be used to recover salt from an aqueous salt solution.
उत्तर
Evaporation can be used to obtain salt from an aqueous salt solution.
APPEARS IN
संबंधित प्रश्न
Name the terms for the change of a solid into liquid.
Explain why steel is used to make railway lines.
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
Name one element, one compound and one mixture.
There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.
- What could the group of materials P be ?
- Name the substances Q. Give two examples of such substances.
- Name the substances R. Write two examples of such substances.
- Name the substances S. Give two examples of such substances.
- Out of Q, R and S, which substances are malleable and ductile ?
Choose the correct answer.
A 5 per cent sugar solution means that :
What will happen if a saturated solution is :
- heated
- cooled
Which of the following is not an emulsion ?
Describe a method to separate a mixture of camphor and sand.
You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
All the matter made of ______.
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Examples of foam are ______.
Evaporation is always accompanied by ______ in temperature.
Define the term matter.
