Basic Science Practice Question and Answer

Q:

Octopus belongs to the phylum

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  • 1
    Echinodermata
    Correct
    Wrong
  • 2
    Nideria
    Correct
    Wrong
  • 3
    Mollusca
    Correct
    Wrong
  • 4
    Chordata
    Correct
    Wrong
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Answer : 3. "Mollusca "

Q:

What is the scientific name for common salt?

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  • 1
    sodium sulfate
    Correct
    Wrong
  • 2
    sodium chloride
    Correct
    Wrong
  • 3
    sodium bicarbonate
    Correct
    Wrong
  • 4
    Ammonium chloride
    Correct
    Wrong
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Answer : 4. "Ammonium chloride"

Q:

Whose register is the montrix record?

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  • 1
    Dangerous foreign species
    Correct
    Wrong
  • 2
    endangered wild species
    Correct
    Wrong
  • 3
    Aquatic places at risk under anthropogenic activities
    Correct
    Wrong
  • 4
    None of these
    Correct
    Wrong
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Answer : 3. "Aquatic places at risk under anthropogenic activities"
Explanation :

The Montreux Record is a register of wetland sites on the List of Wetlands of International Importance where changes in ecological character have occurred, are occurring, or are likely to occur as a result of technological developments, pollution or other human interference. It is maintained as part of the Ramsar List.

Q:

Which one of the following organisms has a role in converting nitrates to free nitrogen?

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  • 1
    Pseudomonas
    Correct
    Wrong
  • 2
    Nitrosomonas
    Correct
    Wrong
  • 3
    Nitrobacter
    Correct
    Wrong
  • 4
    Rhizobium
    Correct
    Wrong
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Answer : 4. "Rhizobium"
Explanation :

Nitrates are reduced back into nitrogen in the soil by a process called denitrification. This process is performed by bacteria like Pseudomonas denitrificans, etc.

Q:

Why it is not advisable to sleep under a tree at night?

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  • 1
    Release of less oxygen
    Correct
    Wrong
  • 2
    Release of more oxygen
    Correct
    Wrong
  • 3
    Release of carbon dioxide
    Correct
    Wrong
  • 4
    Release of carbon monoxide
    Correct
    Wrong
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Answer : 3. "Release of carbon dioxide"
Explanation :

Sleeping under a tree is not advisable at night, since photosynthesis does not occur, oxygen is not being produced by the trees. In addition to this, the trees continue respiring thereby causing the amount of carbon dioxide to be increased and the amount of oxygen to be reduced.

Q:

The sweet taste of fruits is due to-

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  • 1
    Ribose
    Correct
    Wrong
  • 2
    Lactose
    Correct
    Wrong
  • 3
    Fructose
    Correct
    Wrong
  • 4
    Maltose
    Correct
    Wrong
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Answer : 3. "Fructose"

Q:

Which rays are the latest research for use in medicine and war?

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  • 1
    X rays
    Correct
    Wrong
  • 2
    Laser rays
    Correct
    Wrong
  • 3
    Gamma rays
    Correct
    Wrong
  • 4
    cathode rays
    Correct
    Wrong
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Answer : 2. "Laser rays"

Q:

Which of the following hitting methods has the highest power factor?

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  • 1
    heating resistance
    Correct
    Wrong
  • 2
    induction heating
    Correct
    Wrong
  • 3
    Arc heating
    Correct
    Wrong
  • 4
    Dielectric heating
    Correct
    Wrong
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Answer : 1. "heating resistance"
Explanation :

The correct answer is Resistance Heating. Resistance heating is based on the I2R effect and is highly resistive in nature that's why it has the maximum power factor. Electric resistance heating is defined as “the heat produced by passing an electric current through a material that preferably has high resistance”.

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