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how can you seperate two immiscible liquids ?
is air a mixture or compound? give 3 reasons.
state some examples of diffusion in solid, gases, liquid
what is crystallization?
Is air a colloid or a suspension or a true solution ? For a MCQ , should we consider dust particles ?
(a) How can we separate a mixture of two miscible liquids ?
10 difference between 3 states of matter
what happens when a saturated solution is further heated???????????
what does a solution expressed as 3.5% mass by volume mean????????????
what is the difference between distillation and fractional distillation in tabular form?and dont tell mw that go to this link . give me this answer by typing in tabular form.
a growing tree is chemical or phycal change..??
What is the dispersed phase and the dispersion medium in milk?
Is coal a mixture, element or compound?
why is crystallization technique better than evaporation
why do liquids flow ? Explain .
Is growth ofbody (human) a physical change or a chemical change?
State three reasons why you think air is a mixture and water is a compound.
Differentiate between miscible and immiscible liquids..
difference between aqueous and non aqueous solutions?
define aerosol, emulsion, sol, gel
Explain why water is a compound and not a mixture ?
List out the difference between Solution,Suspension and Colloidal Sollution in all aspects.
Which method is used to separate benzene from water
what is the difference between sol,gel and emulsion?
ink is true solution or colloid or suspension??
some say true solution because its only powder and water.
some say colloid.
is it suspension because we can see so many colors when we do chromatography
melting of wax is a physical change whereas burning of candle is a chemical change why?
what are the uses of sublimation in daily life( any three uses)?
geeta poured 20 g of salt into 200ml of water in a beaker she stirred the water to dissolve the salt completely then she heated the solution until it was reduced to half how many grams of salt can be recovered from the remaining solution
what is the solute and solvent in brass
list some more solid solution with theri solvent & solute
draw a flow chart showing the separation of componets of air. Also, name this process?
pls answer......
explain why sodium chloride solution is regarded as a mixture while sodium chloride itself is a pure substance
is kerosene a pure substance
water is a compound not a mixture .justify it by giving two reasons
Is smoke homogeneous or heterogeneous
WHAT DO U MEAN BY BULK PHENOMENON
what are the similarities and differences between evaporation and boiling ? (please give at least 5 points)
define colloidal solution....???
rate of evaporation of aqueous solution decreases with increases in humidity?why.
what is the difference between true solution,suspension,colloidal sol ? I want detailed information
Solubility of potassium nitrate at 313 K is 62 g. What mass of potassium nitrate would be needed to produce a saturated solution of KNO3 in 50 g of water at 313 K ? What is the effect of change of temperature on the solubility of a salt ?
Q.1. Rohan added iodine solution to four samples of food I,II, III and IV. Which will develop blue black colour?
i) Boiled rice (ii) crushed potato (iii) boiled arhar dal (iv) powdered arhar dal
a) I,II (b) I,II,III (c) I,II,IV (d) I,III,IV
explain why water is compound
write any 2 applications of chromatography
how can we separate- iodine, sand and sodium chloride?
What is the difference in apparatus used for distillation and fractional distillation ?
What are the uses of Centrifugation in daily life? (Pls. mention at least five examples)
What happens when dilute HCl is poured on a mixture of iron and sulphur.
suggest separation technique
1,mercury and water
2.potassium chloride and ammonium chloride
3.common salt,water and sand
4.kerosene oil,water and sand
How can you change a saturated solution to unsaturated without adding any more solvent to it
with the help of labelled diagram describe an activity to separate a mixture containing ammoniun chloride and salt
is 22 carat gold , a mixture or a pure substance?comment.
the rate of diffusion of liquids is higher than that of solids. why?
a 5% sugar solution means?
i) 5g of sugar is dissolved in 95g of water
ii) 5g of sugar dissolved in 100g of water
name the process by which common salt is obtained from sea water.
Which gas forms the liquid first as the air is cooled?
Which of the following is a true solution?Why? (a)copper in gold
(b)sulphur in water
(c)milk
(d)KCl in SO2
Calculate the mass of glucose and water required to make 250g of 25% solution of glucose.
WHY DO OUR PALM FEEL COLD IF WE PUT SOME ACETONE OR PERFUME ON IT.?????
on suffering from fever which will lower down your body temperature more ice or ice cold water ?why?
Classify the following into elements, compound and mixtures:
Marble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, water, chalk.
HOW CAN U OBTAIN PURE COPPER SULPHATE FROM IMPURE SAMPLE?
Difference Between Adsorption Chromatography And Partition Chromatography?
define evaporation
What Is Differential Extraction?
How can we separate a mixture of two miscible liquids? Explain and also write the name of method?
How can we separate a mixture of sulphur+sand+sugar+iron fillings?
What is fractional distillation?pls explain the diagram given in the text book for the purpose of my exam.
how will u separate common salt ,sulphur powder n sand from their mixture
A student took x gram water in a beaker and dipped p gram of raisins in tit. After keeping resins in water fro about 2 hours he measured the mass off soaked raisins as q grams .He also measured the mass of water left in beaker which was y grams . On the basis of his observations write the correct formula to find the percentage of observed by raisins.
EXPLAIN why particles of colloidal solution do not settle down when kept undisturbed whereas particles of suspension do settle down?
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Syllabus
how can you seperate two immiscible liquids ?
is air a mixture or compound? give 3 reasons.
state some examples of diffusion in solid, gases, liquid
a) a true solution of common salt, sugar and alum
b) a suspension of soil, chalk powder and fine sand in water
c) a colloidal solution of starch in water and egg albumin/milk in water and distinguish between
these on the basis of
? transparency
? filtration criterion
? stability
2. Preparation of
a) A mixture
b) A compound
what is crystallization?
Is air a colloid or a suspension or a true solution ? For a MCQ , should we consider dust particles ?
(a) How can we separate a mixture of two miscible liquids ?
10 difference between 3 states of matter
what happens when a saturated solution is further heated???????????
what does a solution expressed as 3.5% mass by volume mean????????????
what is the difference between distillation and fractional distillation in tabular form?and dont tell mw that go to this link . give me this answer by typing in tabular form.
a growing tree is chemical or phycal change..??
What is the dispersed phase and the dispersion medium in milk?
Is coal a mixture, element or compound?
why is crystallization technique better than evaporation
why do liquids flow ? Explain .
Is growth ofbody (human) a physical change or a chemical change?
State three reasons why you think air is a mixture and water is a compound.
a)dilute sulphuric acid is added to a mixture of iron fillings and sulphur powder
b)dilute sulphuric acid is added to a mixture of iron fillings and sulphur powder heated to red hot followed by cooling
Differentiate between miscible and immiscible liquids..
difference between aqueous and non aqueous solutions?
define aerosol, emulsion, sol, gel
Explain why water is a compound and not a mixture ?
List out the difference between Solution,Suspension and Colloidal Sollution in all aspects.
Which method is used to separate benzene from water
what is the difference between sol,gel and emulsion?
ink is true solution or colloid or suspension??
some say true solution because its only powder and water.
some say colloid.
is it suspension because we can see so many colors when we do chromatography
melting of wax is a physical change whereas burning of candle is a chemical change why?
what are the uses of sublimation in daily life( any three uses)?
geeta poured 20 g of salt into 200ml of water in a beaker she stirred the water to dissolve the salt completely then she heated the solution until it was reduced to half how many grams of salt can be recovered from the remaining solution
what is the solute and solvent in brass
list some more solid solution with theri solvent & solute
draw a flow chart showing the separation of componets of air. Also, name this process?
pls answer......
Answer in both cases
(It is practical based question)
explain why sodium chloride solution is regarded as a mixture while sodium chloride itself is a pure substance
is kerosene a pure substance
water is a compound not a mixture .justify it by giving two reasons
Is smoke homogeneous or heterogeneous
WHAT DO U MEAN BY BULK PHENOMENON
(i)souring of milk is a chemical change
(ii)mixing of iron and sulphur is a physical change but heating this mixture is a chemical change
what are the similarities and differences between evaporation and boiling ? (please give at least 5 points)
define colloidal solution....???
rate of evaporation of aqueous solution decreases with increases in humidity?why.
what is the difference between true solution,suspension,colloidal sol ? I want detailed information
Solubility of potassium nitrate at 313 K is 62 g. What mass of potassium nitrate would be needed to produce a saturated solution of KNO3 in 50 g of water at 313 K ? What is the effect of change of temperature on the solubility of a salt ?
Q.1. Rohan added iodine solution to four samples of food I,II, III and IV. Which will develop blue black colour?
i) Boiled rice (ii) crushed potato (iii) boiled arhar dal (iv) powdered arhar dal
a) I,II (b) I,II,III (c) I,II,IV (d) I,III,IV
explain why water is compound
2. Name some homogenous as well as heterogeneous mixtures
3. What are the differences between a physical change and a chemical change?
4. How is fog different from smoke?
5. Is water a compound? Prove your answer.
6. Calculate the concentration of 45 g salt present in 500 g of solution.
write any 2 applications of chromatography
how can we separate- iodine, sand and sodium chloride?
What is the difference in apparatus used for distillation and fractional distillation ?
What are the uses of Centrifugation in daily life? (Pls. mention at least five examples)
1) Which of the following is the colloidal solution among them?
A)C.
B) D
C)B
D) A
2) Which of the these will form a clear and transparent solution?
1) A
2) B
3) A and B
4) B and D
3) Which of the these will exhibit the Tyndall effect ?
1) A and D
2) A and B
3) B and C
4) D
What happens when dilute HCl is poured on a mixture of iron and sulphur.
a. CuO b.Cu2O
c. Cu c. CuS
suggest separation technique
1,mercury and water
2.potassium chloride and ammonium chloride
3.common salt,water and sand
4.kerosene oil,water and sand
How can you change a saturated solution to unsaturated without adding any more solvent to it
with the help of labelled diagram describe an activity to separate a mixture containing ammoniun chloride and salt
is 22 carat gold , a mixture or a pure substance?comment.
the rate of diffusion of liquids is higher than that of solids. why?
a 5% sugar solution means?
i) 5g of sugar is dissolved in 95g of water
ii) 5g of sugar dissolved in 100g of water
name the process by which common salt is obtained from sea water.
Which gas forms the liquid first as the air is cooled?
Which of the following is a true solution?Why?
(a)copper in gold
(b)sulphur in water
(c)milk
(d)KCl in SO2
Calculate the mass of glucose and water required to make 250g of 25% solution of glucose.
WHY DO OUR PALM FEEL COLD IF WE PUT SOME ACETONE OR PERFUME ON IT.?????
on suffering from fever which will lower down your body temperature more ice or ice cold water ?why?
Classify the following into elements, compound and mixtures:
Marble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, water, chalk.
HOW CAN U OBTAIN PURE COPPER SULPHATE FROM IMPURE SAMPLE?
Difference Between Adsorption Chromatography And Partition Chromatography?
define evaporation
What Is Differential Extraction?
How can we separate a mixture of two miscible liquids? Explain and also write the name of method?
How can we separate a mixture of sulphur+sand+sugar+iron fillings?
What is fractional distillation?pls explain the diagram given in the text book for the purpose of my exam.
how will u separate common salt ,sulphur powder n sand from their mixture
A student took x gram water in a beaker and dipped p gram of raisins in tit. After keeping resins in water fro about 2 hours he measured the mass off soaked raisins as q grams .He also measured the mass of water left in beaker which was y grams . On the basis of his observations write the correct formula to find the percentage of observed by raisins.
EXPLAIN why particles of colloidal solution do not settle down when kept undisturbed whereas particles of suspension do settle down?