the blanks with appropriate technique of separation---
The method of separating seeds of paddy from its stalks is called -----------
When milk, cooled after boiling, is poured onto a piece of cloth the cream (malai) is left behind on it. This process of separating cream from milk is an example of--------------
Salt is obtained from seawater by the process of ----------
Impurities settled at the bottom when muddy water was kept overnight in a bucket The clear water was then poured off from the top. The process of separation used in this example is called------
True or false?
A mixture of milk and water can be separated by filtration
A mixture of powdered salt and sugar can be separated by the process of winnowing.
Separation of sugar from tea can be done with filtration.
Grain and husk can be separated with the process of decantation.
Element are classified into- Metals- Metalloids—Noble gases. State which of A,B,C and D is a –
A: Non malleable ,Non ductile and a poor conductor of electricity------
B:Has luster ,is malleable and ductile and a good conductor of heat----
C: Is unreactive and inert and present in traces in air------
D:Shows the properties of both the metals and non metals—
Fill in the blanks-
Match the Column A with Coloumn B
Column A
Column B
1) Nitrogen
a)A thin layer of air
2) Oxygen
b) Used by plants for making food
3) Air
c) Major part of air
4)Atmosphere
d) By burning fuels
5)Carbon dioxide
e) Mixture of gases
6) Dust and smoke
f) Needed for respiration and burning
Fill in the blanks-
a. On heating, solids first change to ______________ state and then to __________ state.
b. The liquids take the shape of containing _____________, because the molecules are ___________ to move.
c. The process of conversion of a gas into a liquid is called_______.
d. The state of matter which has definite shape and definite _____________are called solids
e. The gaseous state directly formed from a solid on heating is called ______________
f. The force of attraction between the similar kind of molecules is called _____________
g. ___________ state of matter consists of electrically charged particles of gaseous matter.
h. The particles of matter are in continuous motion and such have ____________energy.
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Answers
Answer:
- threshing
- filtration
- evaporation
- sedimentation
True or false..
- False
- False
- False
- False
1 fill in the blank
a threshing
b filtration
c evaporation
d ) Impurities settled
2 true or false
a false
b Since salt and powdered sugar are of same size and weight they cannot be separated by winnowing. Since sugar is soluble in tea, it cannot be separated by filtration. Grain and husk can be separated by winnowing, not by decantation.
c Since sugar is soluble in tea, it cannot be separated by filtration. Grain and husk can be separated by winnowing, not by decantation.
d false
Non-metals - Metalloids - Noble gases. State which of A, B, C, D is a -
1. Metallic element
2. Non-metallic element
3. Metalloid
4. Noble gas.
A : Is non-malleable, non-ductile & a poor conductor of electricity
B : Has lustre, is malleable and ductile & a good conductor of heat
C : Is unreactive and inert and present In traces in air
D : Shows properties of both metals and non-metals.
b Metals are lustrous, malleable, ductile and good conductors of heat and electricity. Complete step by step answer: A metal is defined as a material when it is specially prepared it shows a lustrous and shiny appearance. There are many physical properties of metals.
c
Solution. C : Is unreactive and inert and present in traces in air Noble gas.
https://www.shaalaa.com › elements-...
Elements Are Classified into –
d Metalloids show properties of both metals and non-metals.
e