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WorksheetsIs Matter Around Us Pure?- Ilavantika
Total questions: 20
Worksheet time: 10mins
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
(i) and (ii)
(i) and (iii)
(iii) and (iv)
(ii) and (iii)
Blood and sea water are
both mixtures
blood is a mixture whereas seawater is a compound
both are compounds
blood is a compound and seawater is a mixture
In a water-sugar solution
water is solute and sugar is solvent
none of these
water is solute and water is also solvent
water is solvent and sugar is solute
Cooking of food and digestion of food are examples of (a) change(type the answer in CAPS LOCK )
Mercury and bromine are both
gases at room temperature
solid at room temperature
liquid at room temperature
metals
When the liquid is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay at the top. This principle is used in:
Centrifugation
Fractional distillation
Evaporation
Simple distillation
Heterogeneous mixture in which the solute particles do not dissolve and remain suspended throughout the solvent and the solute particles can be seen with the naked eye is known as:
Colloid
Sublimation
Suspensions
none of the above
Which of the following non-metal is a good conductor of electricity?
Diamond
Silicon
Aluminium
Graphite
According to the definition of pure substance, which of the following is a pure substance?
Ice
Mercury
Gold
Iron
According to the definition of pure substance, which of the following is a pure substance?(type the answer in CAPS)
(a)
Components of a solution are (a) (type the answer in CAPS)
According to the definition of pure substance, which of the following is a pure substance?(type the answer in CAPS)
(a)
(a) of a substance doesn't alter during the physical change .(type the answer in CAPS).
In tincture of iodine, find the solute and solvent?
(a) alcohol is the solute and iodine is the solvent
(b) iodine is the solute and alcohol is the solvent
(c) any component can be considered as solute or solvent
(d) tincture of iodine is not a solution
a
b
c
d
A pure substance that is made up of only one kind of atom and cannot be broken into two or simpler substances by physical or chemical means is referred to as(type the answer in CAPS)
(a)
The amount of solute present per unit volume or per unit mass of the solution/solvent is known as
Composition of solute
The concentration of a solvent
The concentration of a solute
The concentration of a solution
How one can separate ammonium chloride from a mixture containing ammonium chloride and sodium chloride?
(a) Precipitation
(b) Sublimation
(c) Chromatography
(d) Cetrifugation
a
b
c
d
When two liquids don't mix with each other they are known as (a) (type the answer in CAPS)
Rusting of an article made up of iron is called (a) (type the answer in CAPS)
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (iii) and (iv)
a
b
c
b
