6th Class Science Changes Around us Question Bank

done Changes Around Us Total Questions - 40

• question_answer1)
  Which of the following' is incorrect about physical changes?
  A)
  No new substance is formed. done clear
  B)
  Are reversible changes. done clear
  C)
  Change in size is a physical change. done clear
  D)
  Are irreversible changes. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer2)
  Rusting of iron is an example of:
  A)
  Reversible change            done clear
  B)
  Irreversible change done clear
  C)
  Physical change  done clear
  D)
         No change done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer3)
  Raghu in his craft class is making beads by using POP (plaster of paris). The setting of beads by using water is a/an:
  A)
  Physical change              done clear
  B)
  Reversible change done clear
  C)
  Irreversible change           done clear
  D)
  No change done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer4)
  The energy required to start a chemical reaction is known as:
  A)
  Kinetic energy                 done clear
  B)
  Activation energy done clear
  C)
  Potential energy  done clear
  D)
         Magnetic energy done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer5)
  Which among the following is not an example of a reversible change?
  A)
  Dissolving sugar in water. done clear
  B)
  Changing of wheat to flour. done clear
  C)
  Folding up of a paper. done clear
  D)
  Melting of coaltar. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer6)
  Name the gas which is produced when washing soda reacts with lemon juice.
  A)
  Oxygen                         done clear
  B)
  Nitrogen done clear
  C)
  Argon                         done clear
  D)
  Carbon dioxide done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer7)
  The brown coloured deposition on an iron box when kept in humid air for some days is called:
  A)
  Dust                  done clear
  B)
  Rust done clear
  C)
  Argon                         done clear
  D)
  All the above done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer8)
  Softening of iron on heating is:

  i.   Reversible change

  ii. Chemical change

  iii. Physical change

  iv. Irreversible change

  Which of the following is correct for the above statement?
  A)
  i and iii       done clear
  B)
  ii and iii done clear
  C)
  i and iv               done clear
  D)
             iii and iv done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer9)
  Which of the following is an example of periodic change?
  A)
  Occurrence of earthquake  done clear
  B)
  Heartbeat done clear
  C)
  A car accident done clear
  D)
  Landslide done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer10)
  Which among the following is an irreversible change?
  A)
  Melting of ice. done clear
  B)
  Formation of flower from bud. done clear
  C)
  Heating of milk. done clear
  D)
  Kicking a football. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer11)
  Which change among the following changes is not included in a reversible change?
  A)
  Change it state. done clear
  B)
  Change of position. done clear
  C)
  Change in internal structure.     done clear
  D)
  Change of colour. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer12)
  A substance present in plants which itself does not undergo any change but helps in changing water and carbon dioxide into food.
  A)
  Flower               done clear
  B)
  Bud done clear
  C)
  Leaf      done clear
  D)
         Chlorophyll done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer13)
  While making chapati, Radhika observed the following changes, which among the following is a reversible change?
  A)
  Changing of flour into dough.    done clear
  B)
  Rolling of chapati. done clear
  C)
  Baking of chapati. done clear
  D)
  Eating a chapati. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer14)
  Name the substance which initiates a chemical reaction.
  A)
  Products                                    done clear
  B)
  Reactants done clear
  C)
  Inhibitors        done clear
  D)
         Catalysts done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer15)
  Match the following on the basis of given chemical reaction: \[6C{{O}_{2}}+6{{H}_{2}}O\xrightarrow[Chlorophyll]{Sunlight}{{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{O}_{2}}\]

  Column A		Column B
  (i)	\[C{{O}_{2}}\]	[A]	Product
  (ii)	Chlorophyll	[B]	Photosynthesis
  (iii)	\[{{O}_{2}}\]	[C]	Reactant
  (iv)	Process	[D]	Catalyst

  A)
  (i-D), (ii-C), (iii-A), (iv-B) done clear
  B)
  (i-B), (ii-D), (iii-C), (iv-A) done clear
  C)
  (i-C), (ii-D), (iii-A), (iv-B) done clear
  D)
  (i-C), (ii-B), (iii-D), (iv-A) done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer16)
  Iron blade of spade is made slightly smaller than the wooden handle because:
  A)
  Iron ring contracts on heating. done clear
  B)
  Iron ring expands on heating. done clear
  C)
  Iron ring remains the same on heating. done clear
  D)
  Wooden handle expands on heating. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer17)
  Which among the following is an irreversible change?
  A)
  Ageing of man. done clear
  B)
  Making cheese from milk. done clear
  C)
  Burning of incense stick. done clear
  D)
  All the above done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer18)
  Which pair among the following are the reversible change?
  A)
  Melting of wax and burning of wax. done clear
  B)
  Melting of ice and freezing of ice. done clear
  C)
  Rolling a roti and baking a roti. done clear
  D)
  Folding of paper and burning of paper. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer19)
  Which of the following cannot be reversed?
  A)
  Boiling of an egg.            done clear
  B)
  Folding of paper. done clear
  C)
  Knitting of sweater.          done clear
  D)
  Melting of wax. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer20)
  The change which can be reversed.
  A)
  Chemical change            done clear
  B)
  Physical change done clear
  C)
  Both [a] and [b]  done clear
  D)
        Either [a] or [b] done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer21)
  Which among the following is a characteristic of physical change?
  A)
  Involvement of great amount of heat energy. done clear
  B)
  Change in states. done clear
  C)
  Change in chemical composition. done clear
  D)
  Formation of a new substance done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer22)
  The process in which iron is covered with a brown layer due to moisture and oxygen is called
  A)
  Evaporation       done clear
  B)
  Condensation done clear
  C)
  Rusting      done clear
  D)
         Burning done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer23)
  When water freezes to ice:
  A)
  Heat energy is absorbed. done clear
  B)
  Heat energy is given out. done clear
  C)
  Both [a] and [b] done clear
  D)
  Either [a] or [b] done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer24)
  Making of curd from milk is which kind of change?
  A)
  Unwanted change           done clear
  B)
  Reversible change done clear
  C)
  Irreversible change           done clear
  D)
  No change done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer25)
  ______ is a substance in a chemical reaction which does not undergo any change but helps in increasing the rate of chemical reaction.
  A)
  Reactant                        done clear
  B)
  Product done clear
  C)
  Inhibitor             done clear
  D)
         Catalyst done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer26)
  When cold water is poured over the hot iron rim in a wooden wheel:
  A)
  It expands.                     done clear
  B)
  It contracts. done clear
  C)
  It remains same.  done clear
  D)
         All the above done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer27)
  In general, metals:
  A)
  Expand on heating      done clear
  B)
  Contract on heating done clear
  C)
  Are not affected by heating  done clear
  D)
  All the above done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer28)
  Which of the following is not required in the process of rusting?
  A)
  Water                                        done clear
  B)
  Oxygen done clear
  C)
  Iron       done clear
  D)
         All the above done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer29)
  Which of the following can be considered as a fast change?
  A)
  Growth of child   done clear
  B)
  Germination of seed done clear
  C)
  Bursting of cracker          done clear
  D)
  Cooking of food done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer30)
              When carbon dioxide and water combines they form glucose, this is an example of _____ change.
  A)
  Physical                         done clear
  B)
  Chemical done clear
  C)
  Reversible          done clear
  D)
         Undesirable done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer31)
  Inflating a balloon is a/an _____ change.
  A)
  Irreversible                     done clear
  B)
  Chemical done clear
  C)
  Reversible  done clear
  D)
         Periodic done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer32)
  Which among the following is a reversible change?  
  A)
  Growth in plants and animals. done clear
  B)
  Burning of cloth. done clear
  C)
  Cooking of food. done clear
  D)
  Bursting a balloon done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer33)
  Which among the following is incorrect statement?
  A)
  Rusting of iron is irreversible change.          done clear
  B)
  Ripening of fruits is a chemical change. done clear
  C)
  Breaking of glass is a reversible change. done clear
  D)
  All the above      done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer34)
  Exothermic changes are changes in which: 
  A)
  Heat is absorbed.                        done clear
  B)
  Heat is liberated. done clear
  C)
  Both [a] and [b]   done clear
  D)
                    Either [a] or [b] done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer35)
  Sawing a piece of wood is which kind of change?
  A)
  Reversible change            done clear
  B)
  Irreversible change done clear
  C)
  Chemical change done clear
  D)
  Periodic change done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer36)
  Which kind of change it will be, if a sac of cement gets wet completely and left in open?
  A)
  Irreversible change           done clear
  B)
  Reversible change done clear
  C)
  Biological change done clear
  D)
       Desirable change done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer37)
  Making biogas from cow-dung is which kind of change?
  A)
  Irreversible change           done clear
  B)
  Reversible change done clear
  C)
  Both [a] and [b] done clear
  D)
         Either [a] or [b] done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer38)
  Spilled water on the table when evaporates, the process involves:
  A)
  Releasing of heat                         done clear
  B)
  Absorption of heat done clear
  C)
  Both [a] and [b]  done clear
  D)
        Either [a] or [b] done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer39)
  Expansion of iron on heating is which kind of change?
  A)
  Chemical                       done clear
  B)
  Desirable done clear
  C)
  Reversible          done clear
  D)
         Both [b] and [c] done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer40)
  The new substance formed during or after a chemical reaction is:
  A)
  Catalyst                         done clear
  B)
  Inhibitor done clear
  C)
  Product             done clear
  D)
         Reactant done clear
  E)
  None of these done clear
  View Solution play_arrow