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Recent questions tagged matter around us pure
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What are the homogeneous and heterogeneous catalysts ? Explain with examples.
asked
Mar 26, 2019
in
Chemistry
by
kratos
separation of mixtures
mixtures
pure substances
cbse
matter around us pure
surface chemistry
class-11
class-6
icse
class-12
+2
votes
1
answer
To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.
asked
Mar 24, 2019
in
Class 9
by
kratos
matter around us pure
class-9
cbse
is matter around us pure
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vote
1
answer
Which of the following are physical changes? (i) Melting of iron metal (ii) Rusting of iron (iii) Bending of an iron rod
asked
Mar 22, 2019
in
Class 10
by
kratos
changes around us
class-8
cbse
matter around us pure
chemical reactions
class-7
class-10
chemical reactions and equations
+3
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1
answer
Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less.
asked
Mar 20, 2019
in
Chemistry
by
kratos
organic chemistry
cbse
class-8
matter around us pure
class-11
chemical reactions
some basic principles and techniques
icse
+3
votes
1
answer
. Concentrated sugar syrup made by dissolving sugar in hot water is allowed to cool what do you observe what type of change is it
asked
Mar 18, 2019
in
Class 12
by
kratos
neet
solutions
cbse
thermal properties of matter
matter around us pure
class-11
aiims
thermodynamics
class-7
physical and chemical changes
+1
vote
1
answer
How are sol, solution and suspension different from each other?
asked
Mar 14, 2019
in
Mathematics
by
kratos
matter around us pure
cbse
+3
votes
1
answer
Which of the following are homogeneous in nature? (i) ice (ii) wood (iii) soil (iv) air (a) (i) and (iii) (b) (ii) and (iv)
asked
Mar 14, 2019
in
Class 9
by
kratos
matter around us pure
is matter around us pure
class-9
cbse
+1
vote
1
answer
You are provided with a mixture containing sand, iron filings, ammonium chloride and sodium chloride.
asked
Mar 13, 2019
in
Mathematics
by
kratos
matter around us pure
cbse
+1
vote
1
answer
Write the steps you would use for making tea. Use the words - solution, solvent, solute, dissolve, soluble, insoluble, filtrate and residue.
asked
Mar 13, 2019
in
Class 9
by
kratos
cbse
matter around us pure
class-6
class-9
matter around us
is matter around us pure
+3
votes
1
answer
A sample of water under study was found to boil at 102°C at normal temperature and pressure. Is the water pure?
asked
Mar 11, 2019
in
Class 9
by
kratos
matter around us pure
class-9
matter in our surroundings
cbse
+1
vote
1
answer
Classify the’following into chemical and physical changes. 1. Rusting of iron 2. Ripening of fruits 3. Magnetizing a steel plate
asked
Mar 3, 2019
by
kratos
changes around us
class-8
cbse
matter around us pure
chemical reactions
class-6
+2
votes
1
answer
Write the principle of chromatography technique to separate mixtures in their components.
asked
Mar 2, 2019
in
JEE
by
kratos
compounds
mixtures
separation of substances
cbse
class-8
organic compounds
matter around us pure
jee
elements
class-9
icse
matter around us
jee mains
class-7
+3
votes
1
answer
Which of the following are physical changes? (i) Melting of iron metal (ii) Rusting of iron
asked
Feb 26, 2019
in
Class 9
by
kratos
matter around us pure
class-9
cbse
+3
votes
1
answer
What is corrosion of iron called?
asked
Feb 24, 2019
in
Class 12
by
kratos
metals and nonmetals
neet
cbse
matter around us pure
aiims
class-9
class-10
is matter around us pure
chemical reactions and equations
+3
votes
1
answer
Give an example each for the mixture having the following characteristics. Suggest a suitable method to separate the
asked
Feb 22, 2019
in
Mathematics
by
kratos
matter around us pure
cbse
+3
votes
1
answer
Differentiate between: Suspension and colloid
asked
Feb 18, 2019
in
Chemistry
by
kratos
cbse
class-8
matter around us pure
surface chemistry
electrolyte
icse
class-12
water
+2
votes
1
answer
Rusting of an article made up of iron is called (a) corrosion and it is a physical as well as chemical change
asked
Feb 15, 2019
in
Class 9
by
kratos
matter around us pure
class-9
cbse
is matter around us pure
+2
votes
1
answer
If a piece of metal is heated to temperature θ and then allowed to cool in a room which is at temperature θ0,
asked
Feb 11, 2019
in
JEE
by
kratos
cbse
matter around us pure
class-11
jee
thermodynamics
properties of solids and liquids
jee mains
heat
+1
vote
1
answer
Which of the following statements are true for pure substances? (i) Pure substances contain only one kind of particles
asked
Feb 5, 2019
in
Class 9
by
kratos
matter around us pure
is matter around us pure
class-9
cbse
+3
votes
1
answer
Explain why particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do.
asked
Feb 2, 2019
in
Chemistry
by
kratos
class-12
matter around us pure
surface chemistry
cbse
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