WorksheetsMatter in Our Surroundings
Total questions: 21
Worksheet time: 13mins
In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container
(i) and (iii)
(i) and (ii)
(i) and (iv)
(ii) and (iii)
Plasma was first systematically studied by
(a)
Four students took separately the mixture of sand, common salt and ammonium chloride in beakers, added water, stirred the mixture well and then filtered. They reported their observations as shown above.Who reported the observations in the correct order of the components as residue and in the filtrate?
I
IV
III
II
On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be:
33°C, 56°C and 118°C
35°C, 56°C and 119°C
35°C, 56°C and 118°C
56°, 119°C and 35° C
Which of the following phenomena always results in the cooling effect?
Condensation, Evaporation, Sublimation
(a)
On which year the first gaseous condensate was produced
(a)
When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment:
Air is heavier than bromine
Both air and bromine have the same density
Bromine is heavier than air
Bromine cannot be heavier than air because it is going upwards against gravity
In A Quiz Competition, You Are Asked A Question Where You Have To Choose The Statement Which Is/ Are correct?
Ammonia gas can be liquefied by applying high pressure and lowering the temperature.
Solid carbon dioxide is stored under less-high pressure.
The conversion of solid carbon dioxide into carbon dioxide gas is a change of state which is caused by the increase in pressure and decrease atmospheric temperature.
Whatever be the temperature at which evaporation take place, the latent heat of vaporization need not be supplied whenever a liquid change into vapour or gas.
Seema visited a Natural Gas Compressing unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions.
Low temperature, low pressure
High temperature, low pressure
Low temperature, high pressure
High temperature, high pressure
CO2 can be easily liquified and even solidified because
It has weak forces of attraction
It has comparatively more force of attraction than other gases
It has more intermolecular space
It is present in atmosphere
Expand BEC
(a)
which of the following is / are crystalline substances
salt (sodium chloride)
diamond
Glass
sodium nitrate
The colour of vapours formed on sublimation of iodine solid is
Purple (violet)
Colourless
Yellow
Orange
The correct procedure of heating iron-sulphur mixture to prepare iron sulphide is: :
Heat the powder mixture at the base of the test tube using a blue flame throughout
Heat the iron filings and sulphur mixture in the middle of the test tube using yellow flame throughout.
Heat the powder mixture at the top of the test tube using an orange flame throughout.
Heat the iron filings-sulphur mixture at 3/4 quarters of the test tube using a red flame throughout.
Choose the correct option given below which suites the names of A, B, C, D, E and F .
A: Condensation ; B:Solidification ; C:Melting ; D: Sublimation;E and F: Liquefaction
A: Liquefaction ; B: Evaporation ;C:Condensation; D: Solidification; E and F : Sublimation
A: Condensation; B:Sublimation ; C:Solidification; D: Evaporation; E and F: Vaporization
A: Sublimation; B:Fusion ; C:Liquefaction; D: vaporization; E and F: Solidification
What did this person produced?
(a)
What produces more severe burns, boiling water or steam?
(a)
Which of the following are a better conductor of electricity than copper.
Mica
Plasma
Teflon
Brass
Which of the following are Artificial (man-made) uses of plasma
Fluorescent lightbulbs
Neon signs
Television
Computer screens
globes which are a popular room decoration
Artificial plasma produced in air by a
(a)
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