Chemistry Quiz for Grade 7

  • Question of

    Which of the following is a plant fibre?

    • all pf them
    • Cotton
    • Coir
    • Jute
  • Question of

    We can use ______ to obtain silk thread from cocoons.

    • Reeling
    • Sorting
    • Scouring
    • All of the above
  • Question of

    Which of the following fibre is made of protein?

    • Silk
    • Wool
    • Jute
    • None of them
  • Question of

    Which of the following is a base?

    • Window cleaner
    • Amla
    • Vinegar
    • Curd
  • Question of

    Which of the following is not an indicator that occurs naturally?

    • Phenolphthalein
    • Litmus
    • Turmeric
    • Gudhal
  • Question of

    Which one of the following fruits contains ascorbic acid?

    • Amla
    • Unripe mangoes
    • Grapes
    • Spinach
  • Question of

    Which of the following indicators are typically found as strips?

    • Litmus
    • Turmeric
    • China Rose
    • All of the above
  • Question of

    How will the addition of turmeric affect the colour of lime water?

    • The solution becomes red in colour
    • The solution becomes blue in colour
    • The solution becomes yellow in colour
    • The solution becomes pink in colour
  • Question of

    Which of the following is the outcome of a neutralisation reaction?

    • A salt
    • A solution
    • A mixture
    • A acid and base mixture
  • Question of

    Why is organic matter added to the soil?

    • Because organic matter releases acids in the soil
    • Because organic matter is basic in nature
    • Due to the neutral nature of organic matter
    • Because organic matter is crucial for soil.
  • Question of

    Which of the following acids is formed when carbon dioxide is dissolved in raindrops?

    • Carbonic acid
    • Hydrochloric acid
    • Oxalic acid
    • Formic acid
  • Question of

    Which of the following describes the process of depositing a zinc layer on iron?

    • Galvanisation
    • Crystallisation
    • Rusting
    • None of them
  • Question of

    Which of the following are stainless steel constituents?

    • Iron, Nickel, Carbon, Manganese, Chromium
    • Carbon, Iron, Nickel
    • Iron, Carbon, Nickel, Chromium
    • Iron, Nickel, Manganese
  • Question of

    Which of the following is not a chemical change characteristic?

    • Change in state
    • Change in colour
    • Production of sound
    • Change in smell
  • Question of

    What kind of change occurs when the tip of the blade is placed on a gas stove?

    • Physical change
    • Chemical change
    • No change
    • Irreversible change
  • Question of

    Which of the following does not represent a chemical change?

    • Freezing of water
    • Burning of leaves
    • Fermentation of grapes
    • Turning brown of freshly cut banana
  • Question of

    When food spoils, it emits a foul odour as a result of a chemical change. What is the name given to this process?

    • Rancidity
    • Rusting
    • Crystallization
    • Corrosion
  • Question of

    Which of the following is not a freshwater resource?

    • Ocean
    • Groundwater
    • River
    • None of them
  • Question of

    Which of the following does not help in replenishing groundwater?

    • All of them
    • Deforestation
    • Increasing population
    • Industries
  • Question of

    A substance causing pollution is known as _______.

    • Pollutant
    • Water table
    • Hail
    • None of them
  • Question of

    Water exists in ______ states.

    • One
    • Two
    • Three
    • Four
  • Question of

    Which of the following statements is not correct?

    • Trees are not an essential element of the environment
    • Forest help to prevent soil erosion
    • Forest is a renewable resource
    • Trees help regulate the climate
  • Question of

    Which of the following increases the carbon dioxide level in the atmosphere?

    • Deforestation
    • Afforestation
    • Social forestry
    • None of them
  • Question of

    Which of the following is used to make paint?

    • Resin
    • Latex
    • Both resin and latex
    • None of them
  • Question of

    Which of the following is a scavenger?

    • All of them
    • Jackal
    • Vulture
    • Crow
  • Question of

    Which organism converts human excreta into vermi-cakes in vermi processing toilets?

    • Earthworms
    • Bacteria
    • Microorganisms
    • None of them
  • Question of

    Which of the following settles as a solid in the bottom during wastewater treatment?

    • Sludge
    • Sewage
    • Litter
    • All of them
  • Question of

    What do we call the network of big and small pipes carrying wastewater?

    • Sewerage
    • Sewer
    • Sewage
    • None of them
  • Question of

    Which of the following are the characteristics of wastewater?

    • All of them
    • Rancid taste
    • Offensive smell
    • Dirty look
  • Question of

    Which of the following is a stage in wastewater treatment?

    • All of the above
    • Filtration
    • Aeration
    • Chlorination

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