Class 7 Nutrition In Plants CBSE Questions & Answers

Class 7 · Nutrition In Plants

This is Science Class 7 Nutrition in Plants CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Farmers increase the fertility of soil by adding
  • A
    Pesticides and fertilisers
  • B
    Insecticide and pesticides
  • C
    Fertilisers and manure
    Correct
  • D
    Manure and pesticides
2
Rhizobium, present in the root nodules of leguminous plant convert atmospheric nitrogen into
  • A
    Ammonium
  • B
    Nitrogen sulphide
  • C
    Nitrate and nitrite
    Correct
  • D
    Nitrogen dioxide
3
The organisms that feed on dead and decaying matter are called
  • A
    Heterotrophs
  • B
    Autotrophs
  • C
    Saprophytes
    Correct
  • D
    Parasite
4
Which element is required in major amount in plants?
  • A
    Sulpher
  • B
    Oxygen
  • C
    Boron
  • D
    Nitrogen
    Correct
5
In a pitcher plant, the pitcher is formed by the modification of the
  • A
    Leaf
    Correct
  • B
    Root
  • C
    Stem
  • D
    Flower
6
Which one is a symbiotic association between two organisms?
  • A
    Mucor
  • B
    Amarbel
  • C
    Nostoc
  • D
    Lichens
    Correct
7
To test the presence of starch by iodine, the green leaf is first boiled in alcohol to
  • A
    Remove starch
    Correct
  • B
    Make leaf soft
  • C
    Make the leaf transparent
  • D
    Dissolve chlorophyll
8
Plant obtain water and minerals from
  • A
    Air
  • B
    Soil
    Correct
  • C
    Moisture
  • D
    Fertilisers
9
Rate of photosynthesis is faster in
  • A
    Red light
    Correct
  • B
    Blue light
  • C
    Violet light
  • D
    Green light
10
Molecular formula of carbohydrate is
  • A
    \({{\text{C}}_{{\text{12}}}}{{\text{H}}_{{\text{22}}}}{{\text{O}}_{{\text{12}}}}\)
  • B
    \({{\text{C}}_{{\text{12}}}}{{\text{H}}_{{\text{2}}0}}{{\text{O}}_{{\text{11}}}}\)
  • C
    \({{\text{C}}_{{\text{12}}}}{{\text{H}}_{{\text{22}}}}{{\text{O}}_{{\text{11}}}}\)
    Correct
  • D
    \({{\text{C}}_{{\text{11}}}}{{\text{H}}_{{\text{22}}}}{{\text{O}}_{{\text{11}}}}\)
11
Which of the following chemical is used for absorbing \({\text{C}}{{\text{O}}_{\text{2}}}\)
  • A
    NaOH
  • B
    MgO
  • C
    KOH
    Correct
  • D
    NaCl
12
In desert plants, stomata open during
  • A
    Night
    Correct
  • B
    Day
  • C
    Early morning
  • D
    Late evening
13
During test for starch part of leaf uncovered with black paper become
  • A
    Orange red
  • B
    Green
  • C
    Blue black
    Correct
  • D
    Brown
14
Insectivorous plants trap insects to obtain
  • A
    Carbon
  • B
    Sodium
  • C
    Nitrogen
    Correct
  • D
    Magnesium
15
Symbiotic association between leguminous plant and Rhizobium bacteria is useful for
  • A
    Plant breeders
  • B
    Scientists
  • C
    Agronomists
  • D
    Farmers
    Correct