Advertisements
Advertisements
प्रश्न
What is the general name of the process by which tea-leaves are separated from prepared tea ?
Advertisements
उत्तर
Filtration is the process by which tea-leaves are separated from prepared tea.
APPEARS IN
संबंधित प्रश्न
Name the processes involved in two cases.
What are the two conditions for the interconversion of states of matter ?
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
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 ?
Out of a colloid, solution and a suspension :
which one has the largest particles ?
What happens when the temperature of a saturated sugar solution is increased ?
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
How will you separate camphor, common salt and iron nails from their mixture ?
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
From what substance has the potter made all the things?
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
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
Liquids have ______.
A teabag placed in a cup of hot water will diffuse into the water.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
Define the term matter.
