During photosynthesis green plants absorb by sdfwerte

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									CHEMISTRY DEPARTMENT
   WAID ACADEMY




Standard Grade
   Topic 15
 During photosynthesis green plants                                                            :25
 absorb
1.   oxygen from the air and
     water from the soil.
2.   carbon dioxide from the
     air and water from the soil.
3.   carbon dioxide from the
     air and food from the soil.
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4.   oxygen from the air and
     food from the soil.




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 In green plants the chemical called                                                    :25
 chlorophyll is used to
1. absorb carbon dioxide
   through the leaves.
2. absorb water through
   the roots.
3. absorb oxygen through
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   the leaves.
4. absorb light energy.




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 Photosynthesis in green plants
                                                                               :25
 produces two products. These
 products are
1. Glucose and oxygen.
2. Glucose and carbon
   dioxide.
3. Water and oxygen.
4. Water and carbon                            0% 0% 0% 0%
   dioxide.


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 Animals obtain energy needed for
                                                                     :20
 warmth and movement by a process
 called
1.   polymerisation.
2.   respiration.
3.   cracking.
4.   photosynthesis.

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 Which carbohydrate gives a blue-black
                                      :20
 colour when reacted with iodine
 solution?
1.   Starch.
2.   Glucose.
3.   Sucrose.
4.   Fructose.


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 Which two chemicals are the                                                          :25
 product of respiration?

1. Oxygen and carbon
   dioxide.
2. Oxygen and water.
3. Carbon dioxide and
   water.                                             0% 0% 0% 0%
4. Glucose and oxygen.




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 Carbohydrates contain the                                                                :20
 elements

1.   carbon and hydrogen only
2.   carbon, hydrogen, oxygen
     and nitrogen
3.   carbon, hydrogen, oxygen
     and sulphur
4.   carbon, hydrogen and                                 0% 0% 0% 0%
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 One cause of increased carbon
                                                                                                   :25
 dioxide levels in the atmosphere
 is
1.   Greater use of plastics.
2.   Increased melting of the
     ice caps at the poles.
3.   Increased use of fertilisers.
4.   Increased cutting down of
     rain forests.                                            0% 0% 0% 0%




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 Which of the sugars shown does
                                                          :20
 not give a positive test with
 Benedict's solution?
1.   Maltose
2.   Sucrose
3.   Glucose
4.   Fructose


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 Which two carbohydrates are                                                         :25
 isomers?

1.   maltose and glucose
2.   glucose and sucrose
3.   glucose and starch
4.   maltose and sucrose
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