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question_answer1)
Which of following is a pure substance?
A)
Air done
clear
B)
Distilled water done
clear
C)
Steel done
clear
D)
Brass done
clear
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question_answer2)
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. (NCERT Exemplar) |
A)
I and II done
clear
B)
I and III done
clear
C)
III and IV done
clear
D)
II and III done
clear
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question_answer3)
Which of the following is considered to be a pure substance?
A)
Sodium chloride done
clear
B)
Muddy water done
clear
C)
Granite done
clear
D)
Milk of magnesia done
clear
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question_answer4)
Which of the following property does not prove that water is a compound?
A)
Water is made up of two different elements (H and O). Which chemically combined with one another in a fixed proportion done
clear
B)
Water has fixed boiling point (b. p.) done
clear
C)
The constituents of water cannot be separated by simple physical methods done
clear
D)
Distilled water and tap water have same taste and constituents done
clear
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question_answer5)
The element 'X' having atomic number 16 is
A)
a metal done
clear
B)
a metalloid done
clear
C)
a non-metal done
clear
D)
None of these done
clear
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question_answer6)
Which of the following element is a non-metal?
A)
Fe done
clear
B)
Na done
clear
C)
Cu done
clear
D)
CI done
clear
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question_answer7)
Which one of following is a metalloid?
A)
Na done
clear
B)
Fe done
clear
C)
Cu done
clear
D)
As done
clear
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question_answer8)
Two elements X and Y combine to give a product Z. The correct statement about Z is
A)
Z has more mass than that of X done
clear
B)
Z has less mass than that of X done
clear
C)
Z has less mass than that of Y done
clear
D)
Z show same properties as that of X and Y done
clear
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question_answer9)
Two substances, A and B were made to react to form a third substance, \[{{\mathbf{A}}_{\mathbf{2}}}\mathbf{B}\] according to the following reaction \[\mathbf{2A+B}\to {{\mathbf{A}}_{\mathbf{2}}}\mathbf{B}\] |
Which of the following statements concerning this reaction are incorrect? (NCERT Exemplar) |
I. The product \[{{\mathbf{A}}_{\mathbf{2}}}\mathbf{B}\] shows the properties of substances A and B. |
II. The product will always have a fixed composition. |
III. The product so formed cannot be classified as a compound. |
IV. The product so formed is an element. |
A)
I, II and III done
clear
B)
II, III and IV done
clear
C)
I, III and IV done
clear
D)
II, III and IV done
clear
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question_answer10)
Which of the following is not a compound?
A)
Sodium chloride done
clear
B)
Germanium done
clear
C)
Water done
clear
D)
Methane done
clear
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question_answer11)
Two chemical species X and Y combine together to form a product P which contains both X and Y, X + Y \[\to\] P, X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct? (NCERT Exemplar) |
I. P is a compound |
II. X and Y are compounds |
III. X and Y are elements |
IV. P has a fixed composition |
A)
I and III done
clear
B)
I, II and IV done
clear
C)
II, III and IV done
clear
D)
I, III and IV done
clear
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question_answer12)
The metal present in quicklime is lithium.
A)
True done
clear
B)
False done
clear
C)
Can't say done
clear
D)
Partially true/false done
clear
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question_answer13)
Which of the following statements is not true about the compound?
A)
Elements are combined chemically to form a compound done
clear
B)
The constituents lose their properties done
clear
C)
The constituents can be separated by simple physical methods done
clear
D)
A compound is always homogeneous in nature done
clear
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question_answer14)
Which of the following compounds contains only non-metals?
A)
Ammonia done
clear
B)
Rust done
clear
C)
Quicklime done
clear
D)
Sodium chloride done
clear
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question_answer15)
In which of the following the constituents are present in any ratio?
A)
Compound done
clear
B)
Mixture done
clear
C)
Colloid done
clear
D)
Solution done
clear
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question_answer16)
Which of the following are homogeneous in nature? (NCERT Exemplar) |
I. Ice |
II. Wood |
III. Soil |
IV. Air |
A)
I and III done
clear
B)
II and IV done
clear
C)
I and IV done
clear
D)
III and IV done
clear
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question_answer17)
Which of the following is an example of a homogeneous mixture?
A)
Polluted air done
clear
B)
Muddy water done
clear
C)
Salt solution done
clear
D)
None of these done
clear
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question_answer18)
Identify homogeneous mixture from the following
A)
soil done
clear
B)
vinegar done
clear
C)
unfiltered tea done
clear
D)
polluted air done
clear
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question_answer19)
Select the homogenous mixture from the following
A)
carbon dioxide gas dissolved in water done
clear
B)
air containing suspended particles done
clear
C)
soap bubbles formed by blowing air into soap solution done
clear
D)
water in milk done
clear
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question_answer20)
Mixtures are always combination of the same compounds that are in different states.
A)
True done
clear
B)
False done
clear
C)
Can't say done
clear
D)
Partially true/false done
clear
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question_answer21)
....... is a heterogeneous mixture.
A)
Soda water done
clear
B)
Sodium chloride solution done
clear
C)
Oil in water done
clear
D)
Copper sulphate solution done
clear
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question_answer22)
Which one of the following statements will result in the formation of a mixture? |
I. Crushing marble tile into small particles. |
II. Breaking ice cubes into small pieces. |
III. Adding sodium metal to water. |
IV. Adding milk in water. |
A)
I, II and III done
clear
B)
I, II and IV done
clear
C)
III and IV done
clear
D)
Only IV done
clear
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question_answer23)
Match the Column I with Column II and select the correct option below: |
|
Column I |
|
Column II |
A. |
Substance consists of only a single type of constituent particles |
1. |
Heterogeneous mixtures |
B. |
Visible boundaries of separation between its constituents |
2. |
Compound |
C. |
Constituents lose their properties |
3. |
Mixture |
D. |
Chemical reaction does not take place during its formation Codes |
4. |
Metal |
|
Codes
A)
A-1, B-2, C-3, D-4 done
clear
B)
A-4, B-3, C-1, D-2 done
clear
C)
A-4, B-1, C-2,D-3 done
clear
D)
A-2, B-3,C-1,D-4 done
clear
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question_answer24)
Which of the following statement is correct?
A)
A mixture containing two compounds must be heterogeneous done
clear
B)
A heterogeneous mixture must contain at least three elements done
clear
C)
A homogeneous mixture must be uniform done
clear
D)
A pure substance must contain only one type of atom done
clear
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question_answer25)
When zinc and copper are mixed we get heterogeneous mixture.
A)
True done
clear
B)
False done
clear
C)
Can't say done
clear
D)
Partially true/false done
clear
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question_answer26)
Air is regarded as mixture because
A)
its volume changes under different conditions done
clear
B)
its temperature may change done
clear
C)
its pressure may vary done
clear
D)
its composition may vary done
clear
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question_answer27)
Tincture of iodine has antiseptic properties. This solution is made by dissolving (NCERT Exemplar)
A)
iodine in potassium iodide done
clear
B)
iodine in Vaseline done
clear
C)
iodine in water done
clear
D)
iodine in alcohol done
clear
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question_answer28)
Which of the following is not true regarding properties of a solution?
A)
It is a homogeneous mixture done
clear
B)
The solute particles do not settle down when left undisturbed done
clear
C)
The particles of a solution are smaller than 1 nm in diameter done
clear
D)
The solute particles can be separated from the mixture by the process by filtration done
clear
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question_answer29)
In a sweetened tea, the sugar is called
A)
solvent done
clear
B)
solute done
clear
C)
solution done
clear
D)
None of the above done
clear
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question_answer30)
The concentration of a solution represents
A)
the total quantity of solution done
clear
B)
the quantity of the solvent present in a solution done
clear
C)
the quantity of the solute present in a solution done
clear
D)
the quantity of the impurities present in a solution done
clear
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question_answer31)
The solutions with low amount of solutes are called ........
A)
diluted done
clear
B)
concentrated done
clear
C)
solvents done
clear
D)
None of these done
clear
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question_answer32)
A solution contains 50 g of common salt in 450 g of water. The concentration of the solution is
A)
500% done
clear
B)
50% done
clear
C)
10% done
clear
D)
80% done
clear
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question_answer33)
A solution is heterogeneous mixture, which contains non-uniform composition.
A)
True done
clear
B)
False done
clear
C)
Can't say done
clear
D)
Partially true/false done
clear
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question_answer34)
Which of the following is an example of solution?
A)
Soda water done
clear
B)
Unfiltered tea done
clear
C)
Sand and water done
clear
D)
Milk done
clear
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question_answer35)
The particles of solution can be seen by naked eye.
A)
True done
clear
B)
False done
clear
C)
Can't say done
clear
D)
Partially true/false done
clear
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question_answer36)
A mixture of chalk powder in water is an example of
A)
homogeneous mixture done
clear
B)
compound done
clear
C)
colloidal solution done
clear
D)
suspension done
clear
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question_answer37)
Which of the following will not show Tyndall effect?
A)
Smoke done
clear
B)
Foam done
clear
C)
Jelly done
clear
D)
Salt solution done
clear
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question_answer38)
Suspensions are .........
A)
invisible to naked eye done
clear
B)
visible to naked eye done
clear
C)
visible through microscope done
clear
D)
invisible under electron microscope done
clear
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question_answer39)
A colloid is a .. .X... mixture and its components can be separated by the technique known as ... Y...
A)
X=homogeneous, y=filtration done
clear
B)
X= heterogeneous, V= filtration done
clear
C)
X=heterogeneous. y=centrifugation done
clear
D)
X=homogeneous, y=centrifugation done
clear
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question_answer40)
A liquid is able to scatter a beam of light but it leaves no residue after passing through a filter paper. A liquid can be a
A)
true solution done
clear
B)
suspension done
clear
C)
colloidal sol done
clear
D)
concentrated solution done
clear
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question_answer41)
The fine particles of an insoluble substance uniformly dispersed throughout a gas or liquid is called
A)
precipitate done
clear
B)
suspension done
clear
C)
colloidal solution done
clear
D)
true solution done
clear
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question_answer42)
Gel is which of the following kind of solution?
A)
Mixture done
clear
B)
True solution done
clear
C)
Suspension done
clear
D)
Colloid done
clear
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question_answer43)
Which of the following is an example of emulsion?
A)
Mist done
clear
B)
Milk done
clear
C)
Face cream done
clear
D)
Both [b] and [c] done
clear
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question_answer44)
A mixture of sulphur and carbon disulphide is (NCERT Exemplar)
A)
heterogeneous and shows Tyndall effect done
clear
B)
homogeneous and shows Tyndall effect done
clear
C)
heterogeneous and does not show Tyndall effect done
clear
D)
homogeneous and does not show Tyndall Effect done
clear
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question_answer45)
Which of the following is not an example of colloid?
A)
Sugar syrup done
clear
B)
Milk done
clear
C)
Fog done
clear
D)
Butter done
clear
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question_answer46)
Which of the following will not form a true solution upon shaking?
A)
Alum done
clear
B)
Starch solution done
clear
C)
Sucrose done
clear
D)
Common salt done
clear
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question_answer47)
Select the false statement about colloids form the following.
A)
Colloids are homogeneous done
clear
B)
Colloids can scatter a beam of light passing through it done
clear
C)
Colloids show Tyndall effect done
clear
D)
Colloids are quite stable done
clear
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question_answer48)
Butter is a colloid which formed when
A)
water is dispersed in fat done
clear
B)
fat is dispersed in milk done
clear
C)
water is dispersed in milk done
clear
D)
fat is dispersed in water done
clear
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question_answer49)
The number of phases in colloidal system are
A)
one done
clear
B)
two done
clear
C)
three done
clear
D)
is depends on substances done
clear
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question_answer50)
Match the Column I with Column II and select the correct option below : |
|
Column I |
|
Column II |
A. |
Blood |
1. |
Colloid |
B. |
Milk |
2. |
Suspension |
C. |
Sugar solution |
3. |
Emulsion |
D. |
Chalk water |
4. |
True solution |
|
Codes
A)
A-1, B-2, C-3, D-4 done
clear
B)
A-4, B-2, C-3, D-1 done
clear
C)
A-1, B-3, C-4, D-2 done
clear
D)
A-3, B-4, C-1, D-2 done
clear
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question_answer51)
Smoke and fog differ from each other because
A)
they have different dispersion medium done
clear
B)
they have different dispersed phase done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
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question_answer52)
Miscible liquids are separated by ........
A)
centrifugation done
clear
B)
fractional distillation done
clear
C)
filtration done
clear
D)
sublimation done
clear
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question_answer53)
The method used to separate a dye from blue ink is
A)
evaporation done
clear
B)
sedimentation done
clear
C)
crystallisation done
clear
D)
filtration done
clear
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question_answer54)
The most suitable technique used to separate mixture of different gases from bulk of air, can be
A)
chromatography done
clear
B)
sublimation done
clear
C)
fractional distillation done
clear
D)
centrifugation done
clear
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question_answer55)
........ is used when a mixture contains two components, out of which one is soluble.
A)
Evaporation done
clear
B)
Sublimation done
clear
C)
Chromatography done
clear
D)
Filtration done
clear
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question_answer56)
Match the Column I with Column II and select the correct option below : |
|
Column I |
|
Column II |
A. |
Miscible liquids |
1. |
Distillation |
B. |
Immiscible liquids |
2. |
Crystallisation |
C. |
Pure copper sulphate from an impure sample |
3. |
Sublimation |
D. |
Salt and ammonium chloride |
4. |
Separating funnel |
|
Codes
A)
A-1, B-2, C-3, D-4 done
clear
B)
A-4, B-2, C-3, D-1 done
clear
C)
A-1, B-3, C-4, D-2 done
clear
D)
A-3, B-4, C-1, D-2 done
clear
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question_answer57)
A mixture contains four solid compounds P, Q, R and S. On heating, R changes to vapour state. It can be separated from rest of the solids by
A)
sublimation done
clear
B)
filtration done
clear
C)
crystallisation done
clear
D)
distillation done
clear
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question_answer58)
Which of the following are physical changes? (NCERT Exemplar) |
I. Melting of iron metal |
II. Rusting of iron |
III. Bending of an iron rod |
IV. Drawing a wire of iron metal |
A)
I, II and III done
clear
B)
I, II and IV done
clear
C)
I, III and IV done
clear
D)
II, III and IV done
clear
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question_answer59)
During burning of candle, both physical and chemical takes place.
A)
True done
clear
B)
False done
clear
C)
Can't say done
clear
D)
Partially true/false done
clear
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question_answer60)
Which of the following are chemical changes? (NCERT Exemplar) |
I. Decaying of wood |
II. Burning of wood |
III. Sawing of wood |
IV. Hammering of a nail into a piece of wood |
A)
I and II done
clear
B)
II and III done
clear
C)
III and IV done
clear
D)
I and IV done
clear
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