Quiz: Is Matter Around US Pure?
(148).jpg "Quiz: Is Matter Around US Pure?")
Time: 30 Minute
- 1.Which of the following statements are true for pure substances?
- Pure substance contain only one kind of particles
- Pure substance may be compounds or mixtures
- Pure substance have the same composition throughout
- Pure substances can be exemplified by all elements other than nickel
- A.
A) and b)
- B.
A) and c)
- C.
C) and d)
- D.
B) and c)
- 2.Rusting of an article made up of iron is called
- A.
Corrosion and it is a physical as well as chemical change
- B.
Dissolution and it is a physical change
- C.
Corrosion and it is a chemical change
- D.
Dissolution and it is a chemical change
- 3.Which of the following provides an example of a true solution?
- A.
Blood
- B.
Milk
- C.
Starch solution
- D.
Sugar solution
- 4.A solution, which at a given temperature dissolves as much solute as it is capable of dissolving, is said to be a –
- A.
Saturated solution
- B.
Semi saturated solution
- C.
Unsaturated solution
- D.
Super saturated solution
- 5.The concentration of solution is the mass of the solute in grams, which is present in –
- A.
10 gm of solvent
- B.
10 gm of solution
- C.
100 gm of solvent
- D.
100 gm of solution
- 6.Mixture of sand in water is an example of
- A.
True solution
- B.
Colloidal solution
- C.
Suspension
- D.
None of the above
- 7.Which one of the following shows tyndall effect
- A.
Salt solution
- B.
Milk
- C.
Copper sulphate solution
- D.
Starch solution
- 8.Tincture of iodine has antiseptic properties. This solution is made by dissolving
- A.
Iodine in potassium iodide
- B.
Iodine in Vaseline
- C.
Iodine in water
- D.
Iodine in alcohol
- 9.Which of the following is/are physical change?
- Melting of iron metal
- Rusting of iron
- Bending of an iron rod
- Drawing a wire of iron metal
- A.
A) b) c)
- B.
A) b) d)
- C.
A) c) d)
- D.
B) c) d)
- 10.Which of the following is/are chemical change
- decaying of wood
- burning of wood
- sawing of wood
- hammering of a nail in to a piece of wood
- A.
A) b)
- B.
B) c)
- C.
C) d)
- D.
A) d)
- 11.Air is regarded as a –
- A.
Compound
- B.
Mixture
- C.
Element
- D.
Electrolyte
- 12.Which of the following statement is not true about true solution?
- A.
It can pass through filter paper.
- B.
It is homogeneous in nature.
- C.
At constant temperature, particles of solute settle down.
- D.
From a true solution, the solute can easily be recovered by evaporation or crystallization.
- 13.Butter can be separated from curd by
- A.
Centrifugation
- B.
Evaporation
- C.
Crystallization
- D.
Sublimation
- 14.
![Two chemical species X and Y combine together to form a product P which contains both X and Y.X + Y -------------------PX 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 correctP is compoundX and Y are compoundX and Y are elementP has a fixed composition - ProProfs]( "Two chemical species X and Y combine together to form a product P which contains both X and Y.X + Y -------------------PX 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 correctP is compoundX and Y are compoundX and Y are elementP has a fixed composition")
Two chemical species X and Y combine together to form a product P which contains both X and Y.X + Y -------------------PX 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- P is compound
- X and Y are compound
- X and Y are element
- P has a fixed composition
- A.
I, ii and iii
- B.
I, ii and iv
- C.
Ii , iii and iv
- D.
I, iii and iv
- 15.Crystallization method cannot be used to purify those mixture which​
- A.
Contain insoluble and/ or soluble impurities
- B.
Have crystalline nature
- C.
Either decompose or get charred o heating to dryness that is which cannot be separated by evaporation
- D.
Can be separated by filtration as some impurities are soluble
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