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WorksheetsJNV SHEIKHPURA PWT-1 CLASS IX MM-25 TIME 1Hr
Total questions: 25
Worksheet time: 50mins
Air is regarded as mixture because?
It's pressure may vary.
It's temperature may vary.
Volume changes under different compositions.
It's compositions may vary.
A sample contains two substances and has uniform properties. The sample is ________?
A compound.
A heterogeneous mixture.
An element.
A homogeneous mixture.
The amount of solute present per unit volume or per unit mass of the solution/solvent is known as
(a) Composition of solute
(b) Concentration of a solvent
(c) Concentration of a solute
(d) Concentration of a solution
Two chemical species X and Y combine together to form a product P which contains both X and Y
X + Y → 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?
(i) P is a compound
(ii) X and Y are compound
(iii) X and Y are elements
(iv) 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)
as the temperature rises, particles of matter move
fast
slow
not effected
none of them
intermixing of two different types of matter on their own is called:
fusion
diffusion
vaporisation
condensation
The S.I unit of temperature is:
Celsius
Fahrenheit
Kelvin
None
On which factors evaporation does not depend
Humidity
Temperature
Surface area
Quality of matter
Which is known as dry ice.
SOLID C O2
H2O
Fruit ice
Both a &b
The amount of heat which is used to change the state of matter not for increase the temperature is called
Latent heat
Specific heat
Heat capacity
None of the above.
In which state of matter , process of diffusion is fastest?
Liquids
Gases
Solids
Semi - solids
During summer, water kept in an earthen pot becomes cool because of the phenomenon of:
diffusion
transpiration
osmosis
evaporation
Seema took a 100 ml beaker and filled half the beaker with water and marked the level of water. She dissolved some salt with the help of a glass rod and recorded water level again.
The water level increases appreciably
The water level decreases
The water level remains the same
There is little increase in water level.
Which of the following is correct order of forces of attraction?
Water > Air > Sand
Air > Sugar > Oil
Air < Water < Sugar
Salt > Air > Juice
Which of the following will produce severe burns ?
Cold water
Hot water
Boiling water
Steam
Latent heat of fusion is amount of
heat energy required to change 1 kg solid into liquid completely at its melting point.
heat energy required to convert 1 kg solid into liquid at room temperature
heat energy required to change 1 g of solid into liquid completely
heat energy required to change 1 kg of solid into liquid at any temperature.
Kinetic energy of molecules is directly proportional to
(a) temperature
(b) pressure
(c) both (a) and (b)
(d) atmospheric pressure
A gas can be best liquefied
(a) by increasing the temperature
(b) by lowering the pressure
(c) by increasing the pressure and reducing the
temperature
(d) none of these
The property to flow is unique to fluids. Which one of the following statements is correct?
Only gases behave like fluids
Gases and solids behave like fluids
Gases and liquids behave like fluids
Only liquids are fluids
What is the full form of CNG?
Cairo Nitro Gasoline
Car Need Gas
Compressed Natural Gas
Congress Natural Gas
Which of the following are also considered to be states of matter?
Plasma
Platelets
BEC (Bose Einstein Condensate)
BHC
A solution contains 50 g common salt in 200g of water. Calculate the concentration of the solution.
14.5%
16.6%
20%
25%
The size of the particle of solute is ............ for colloidal Solution
<1nm
>1nm
Between 1nm and 100nm
Above 100 nm
Tyndall effect means
Rays scattered by dust particles
Rays travelling from one medium to other
Rays undergoing Refraction
Rays undergoing totally reflected
