Matter in Our Surroundings quiz-1

Matter in Our Surroundings

Quiz

 

1. 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
   1.   (i) and (iii)
   2.   (i) and (iv)
   3.   (ii) and (iii)
   4.   (ii) and (iv)
2. 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:
   1.   Air is heavier than bromine
   2.   Both air and bromine have the same density
   3.   Bromine is heavier than air
   4.   Bromine cannot be heavier than air because it is going upwards against gravity
3. A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is
   1.   Krypton
   2.   Kerosene
   3.   Carbon steel
   4.   Carbon dioxide
4. Which one of the following statements is not true?
   1.   The molecules in a solid vibrate about a fixed position
   2.   The molecules in a liquid are arranged in a regular pattern
   3.   The molecules in a gas exert negligibly small forces on each other, except during collisions
   4.   The molecules of a gas occupy all the space available
5. The correct procedure of heating iron-sulphur mixture to prepare iron sulphide is:
   1.   Heat the powder mixture at the base of the test tube using a blue flame throughout.
   2.   Heat the iron filings and sulphur mixture in the middle of the test tube using yellow flame throughout.
   3.   Heat the powder mixture at the top of the test tube using an orange flame throughout.
   4.   Heat the iron filings-sulphur mixture at 3/4 quarters of the test tube using a red flame throughout.
6. When water at 0°C freezes to form ice at the same temperature of 0°C, then it:
   1.   Absorbs some heat
   2.   Releases some heat
   3.   Neither absorbs nor releases heat
   4.   Absorbs exactly 3.34 x 105J/kg of heat
7. When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :
   1.   Rises very slowly
   2.   Rises rapidly until steam is produced
   3.   First rises and then becomes constant
   4.   Does not rise at all
8. Which one of the following set of phenomena would increase on raising the temperature?
   1.   Diffusion, evaporation, compression of gases
   2.   Evaporation, compression of gases, solubility
   3.   Evaporation, diffusion, expansion of gases
   4.   Evaporation, solubility, diffusion, compression of gases
9. On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be:
   1.   33°C, 56°C and 118°C
   2.   35°C, 56°C and 119°C
   3.   35°C, 56°C and 118°C
   4.   56°, 119°C and 35° C
10. Which of the following phenomena always results in the cooling effect?
    1.   Condensation
    2.   Evaporation
    3.   Sublimation
    4.   None of these
11. Which of the following cannot be considered a form of matter?
    1.   Atom
    2.   Water
    3.   Humidity
    4.   Electron
12. Which of the following causes the temperature of a substance to remain constant while it is undergoing a change in its state?
    1.   Latent heat
    2.   Lattice energy
    3.   Loss of heat
    4.   None of these
13. Which of the following statement is correct?
    1.   Materials existing as liquids at room temperature have their melting and boiling points lower than that of room temperature.
    2.   The phenomenon involving the transition of a substance from solid to liquid state is called sublimation.
    3.   To convert a temperature on the Celsius scale to Kelvin scale, subtract 273 from the given temperature
    4.   The density of ice is less than that of water.
14. Which of the following statement is not true regarding the characteristic of matter?
    1.   Particles of a matter are randomly moving in all directions.
    2.   Kinetic energy of the particles increases with a rise in temperature
    3.   Kinetic energy of the particles of all maters remains the same at a particular temperature.
    4.   Particles of matter diffuse into each other on their own.

Matters- As pure and impure

 

Anything that occupies some space, having mass, volume and can be felt by one or more out of five senses is called matter. The purest form of matter is called an element. An element is a substance which cannot be split up into two or more simpler substances by the usual chemical methods of applying heat, light or electric energy.

A pure substance consists of a single type of particles. All the elements and compounds are pure substances because they contain only one kind of particles. eg. Hydrogen, Carbon, Oxygen, Carbon-monoxide,Copper, Gold, Silver.

 

A pure substance has a fixed composition as well as a fixed boiling point and melting point. The presence of impurities generally increases the melting and boiling point of the pure substances

 

Q: 8.1 Which of the statement is true about pure substances

a.     Homogeneous mixtures are pure as they have same composition throughout.

b.     22 carat goldis pure in nature.

c.     Elements are not pure in nature.

d.     Gold and carbon dioxide both are pure in nature.

 

Q: 8.2 The boiling point of pure water is 100^oC. What likely be the effect on the boiling point of water if 150 gm NaCl is added to one litre of water ?

______________________________________________________________________________________________________________________________.

 

Q: 8.3 Carbonmonoxide gas can be separated into carbon and oxygen gas by ________________.

     a.     Chemical methods

     b.     Applying heat,

     c.     Sunlight or electric energy

     d.     None of the above.

Q: 8.4The melting point of 1 Kg carbon dioxide is –79°C. What will be the melting point of 500gmCarbondioxide?

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Q: 8.5 Why table salt resist free flow and becomes damp during rainy season moisture if exposed to damp air although sodium chloride does not hygroscopic?

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Q: 8.6 Universe is made up of matter justify this statement?

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Answer Key and Credit:

ANSWER 8.1:-

 

Scientific Literacy:

FRAMEWORK	CHARACTERISTICS
Competency	Evaluate and design scientific enquiryExplain the phenomenon scientifically
Knowledge system	Knowledge of science-Physical
Context	Global
Cognitive demand	Low
Item format	Simple Multiple choice question.
Proficiency level	2

 

Credit Pattern:

Full Credit:	2
Partial Credit:	1
Nil Credit:	0

 

Full Credit:	(D)(d) Gold and carbon dioxide both are pure in nature.
Partial Credit:	Only if one factor is mentioned like Gold or Carbonmondioxide
Nil Credit:	Other responses.(A), (B) and (C)

 

ANSWER 8.2:-

Scientific Literacy:

FRAMEWORK	CHARACTERISTICS
Competency	Interpret data and evidencescientificallyEvaluate and design scientific enquiry
Knowledge system	Knowledge of science-Physical
Context	Global
Cognitive demand	Medium
Item format	Closed constructive
Proficiency level	4

Credit Pattern:

Full Credit:	2
Partial Credit:	1
Nil Credit:	0

 

Full Credit:	Boiling point of water will increase.
Partial Credit:	101oC or above
Nil Credit:	Boiling point of water will remains constant or decreasies.

 

ANSWER 8.3:-

Scientific Literacy:

FRAMEWORK	CHARACTERISTICS
Competency	Use scientific evidences to draw conclusion
Knowledge system	Procedural
Context	Global
Cognitive demand	Low
Item format	Simple Multiple choice question.
Proficiency level	2

Credit Pattern:

Full Credit:	2
Partial Credit:	1
Nil Credit:	0

 

 

Full Credit:	(D) None of the above.
Partial Credit:	------
Nil Credit:	Other responses.(A), (B) and (C)

 

ANSWER 8.4:-

Scientific Literacy:

FRAMEWORK	CHARACTERISTICS7
Competency	Interpret Data and Evidence Scientifically
Knowledge system	Physical
Context	Global
Cognitive demand	Low
Item format	Closed constructive
Proficiency level	1

Credit Pattern:

Full Credit:	2
Partial Credit:	1
Nil Credit:	0

 

 

Full Credit:	Same –79°C.
Partial Credit:	------
Nil Credit:	Other responses or missing

 

ANSWER 8.5:-

Scientific Literacy:

FRAMEWORK	CHARACTERISTICS7
Competency	Evaluate and design scientific enquiry
Knowledge system	Earth
Context	Global
Cognitive demand	High
Item format	Closed constructive
Proficiency level	5

Credit Pattern:

Full Credit:	2
Partial Credit:	1
Nil Credit:	0

 

Full Credit:	The presence of CaCl2 and MgCl2 impurities in table salt absorb moisture if exposed to moist air and resist free flow.
Partial Credit:	Due to the presence of impurities.
Nil Credit:	Any other or missing.

ANSWER 8.6:-

Scientific Literacy:

FRAMEWORK	CHARACTERISTICS7
Competency	Evaluate and design scientific enquiry
Knowledge system	Earth
Context	Global
Cognitive demand	High
Item format	Closed constructive
Proficiency level	5

Credit Pattern:

Full Credit:	2
Partial Credit:	1
Nil Credit:	0

 

Full Credit:	Space research have shown that all the star, planet and satellites are very big in size and made up of solid particle and sometimes possess (gaseous) atmosphere. Even our earth planet contains soil, mineral rocks, water and atmosphere therefore according to the definition mentioned anything that occupies some space, having mass, volume and can be felt by one or more out of five senses is called matter.
Partial Credit:	Universe is made up of solid liquid and gases.
Nil Credit:	Any other or missing.