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Air Around Us Science - Air Around Us

Jharkhand Board (JAC) - STD 6 - Science (Jharkhand - English Medium). 321 questions in this chapter.

Question types

Air Around Us question types

321 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

321
Questions
9
Question groups
5
Question types
Sample Questions

Air Around Us questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1[1 Marks Each] M.C.Q.1 Mark
DIRECTIONS: Read the passage(s) given below and answer the questions that follow Passage - The earth is surrounded by a thin layer of air. Thin layer extends upto many kilometers above the surface of earth and is called atmosphere. Which of the following statement(s) is/ are correct?
  • A
    Atmosphere is the envelope of air that surrounds the earth.
  • B
    Atmospheric gases contain nitrogen and oxygen.
  • ✓
    Both the above are correct.
  • D
    None of these.

Answer: C.

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Q 3[1 Marks Each] M.C.Q.1 Mark
DIRECTIONS: Read the passage(s) given below and answer the questions that follow Passage - If in a closed room there is some material that is burning, you may have felt suffocation. This is due to excess carbon dioxide that may be accumulating in the room. Plants and animals consume oxygen for respiration and produce carbon dioxide. Which of the following is consumed by plants and animals during respiration?
  • ✓
    Oxygen.
  • B
    Nitrogen.
  • C
    Carbon dioxide.
  • D
    None of these.

Answer: A.

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Q 4[1 Marks Each] M.C.Q.1 Mark
Usha took a lump of dry soil in a glass and added water to it till it was completely immersed. She observed bubbles coming out. The bubbles contain:
  • A
    Water vapour.
  • B
    Only oxygen gas.
  • ✓
    Air.
  • D
    None of these.

Answer: C.

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Q 5[1 Marks Each] M.C.Q.1 Mark
Which of the following statement is correct?
  • A
    $\frac{2}{3}\Big|$part is nitrogen and $\frac{1}{3}\Big|\text {rd}$ part is oxygen.
  • B
    $\frac{3}{4}\Big|$part is oxygen and $\frac{1}{4}\Big|$ part is nitrogen.
  • C
    $\frac{1}{2}\Big|$ part is oxygen and $\frac{1}{2}\Big|$ part is nitrogen and other.
  • ✓
    $\frac{1}{5}\big|$part is oxygen and $\frac{4}{5}\Big|$ part is nitrogen and other gases.

Answer: D.

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Q 6Assertion (A) & Reason (B) MCQ1 Mark
DIRECTIONS: Read the passage(s) given below and answer the questions that follow Passage - If in a closed room there is some material that is burning, you may have felt suffocation. This is due to excess carbon dioxide that may be accumulating in the room. Plants and animals consume oxygen for respiration and produce carbon dioxide.
Assertion (A): Aquatic animals use dissolved air (or oxygen) in water for respiration.
Reason (R): When fuel is burnt, a smoke is produced.
  • A
    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
  • ✓
    Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
  • C
    $A$ is true but $R$ is false
  • D
    $A$ is false but $R$ is true

Answer: B.

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Q 7Assertion (A) & Reason (B) MCQ1 Mark
DIRECTIONS: Read the passage(s) given below and answer the questions that follow Passage - If in a closed room there is some material that is burning, you may have felt suffocation. This is due to excess carbon dioxide that may be accumulating in the room. Plants and animals consume oxygen for respiration and produce carbon dioxide.
Assertion (A): The gases nitrogen and oxygen together make 90% (by volume) of air.
Reason (R): Air contains some dust particles.
  • A
    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
  • B
    Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
  • C
    $A$ is true but $R$ is false
  • ✓
    $A$ is false but $R$ is true

Answer: D.

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Q 8Assertion (A) & Reason (B) MCQ1 Mark
DIRECTIONS: The questions in this segment consists of two statements, one labelled as assertion $A?$ And the other labelled as "reason $R??$. You are to examine these two statements carefully and decide if the assertion $A$ and reason $R$ are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below.
Assertion (A): Air is a homogeneous mixture of gases.
Reason (R): The composition of every part of a homogeneous mixture is same.
  • ✓
    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
  • B
    Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
  • C
    $A$ is true but $R$ is false
  • D
    $A$ is false but $R$ is true

Answer: A.

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Q 9Assertion (A) & Reason (B) MCQ1 Mark
DIRECTIONS: Read the passage$(s)$ given below and answer the questions that follow Passage - If in a closed room there is some material that is burning, you may have felt suffocation. This is due to excess carbon dioxide that may be accumulating in the room. Plants and animals consume oxygen for respiration and produce carbon dioxide.
Assertion (A): Atmosphere is essential for life on earth.
Reason (R): Carbon dioxide is a colourless, odourless gas present in air.
  • A
    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
  • ✓
    Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
  • C
    $A$ is true but $R$ is false
  • D
    $A$ is false but $R$ is true

Answer: B.

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Q 25[3 Marks Each] QUE-ANS3 Marks
Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?
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Q 29[3 Marks Each] QUE-ANS3 Marks
On a Sunday morning Paheli’s friend visited her home. She wanted to see some flowering plants in the nearby garden. Both of them went to the garden. While returning from the garden they also observed some flowering plants on the road side. But to their surprise they found that the leaves and flowers of these roadside plants were comparatively very dull. Can you help them to know why?
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Q 35case /data -based (4 Marks)4 Marks
The picture shows trekkers at four different locations on a mountain.
$P, Q, R$ and $S$ are the four different locations.
Image
$6.$ At which location will a trekker need maximum oxygen from the cylinder?
$A.$ P
$B.$ Q
$C.$ R
$D.$ S
$7.$ Why is it safer to breathe through the nose than through the mouth?
$8.$ Wearing a face mask prevents germs present in the air from entering our body.
What is another beneit of wearing a face mask?
$A.$ It prevents the drying of lips.
$B.$ It helps to reduce bad breath.
$C.$ It helps to keep the face warm.
$D.$ It prevents dust from entering the body.
$9.$ Which of these actions can cause air pollution?
Circle $‘Yes’$ or $‘No’$ for the correct response.
Can this cause air pollution? $Yes$ or $No$
Using solar water heaters $Yes/No$
Burning plastic wastes $Yes/No$
Driving electric vehicles $Yes/No$
$10.$ Which is the largest component of air?
$A.$ Oxygen
$B.$ Nitrogen
$C.$ Water vapour
$D.$ Carbon dioxide
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Q 37case /data -based (4 Marks)4 Marks
Roja blows air through a straw into a glass of water.
She sees bubbles coming out from the straw in the water.
Image
$4.$ What does this show?
  • A
    Air has mass.
  • ✓
     Air takes up space.
  • C
     Air can exert pressure.
  • D
    Air contains water vapour.

Answer: B.

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Q 38case /data -based (4 Marks)4 Marks
Sumit wants to find out if burning takes place only in the presence of air.
He places a burning candle inside each of the four inverted glasses.
Image
$1.$ Inside which glass will the candle stop burning last?
$A.$ Glass $1$
$B.$ Glass $2$
$C.$ Glass $3$
$D.$ Glass $4$
$2.$ What should Sumit keep the same for the activity?
Circle $‘Yes’$ or $‘No’$ for the correct response.
Should this be kept the same? $Yes$ or $No$
Size of the candles $Yes/No$
Thickness of the glass walls $Yes/No$
Thickness of the glass walls $Yes/No$
$3.$ Which of these shows that air contains water vapour?
$A.$ Steam is produced when water is heated.
$B.$ Road surfaces shine on hot summer days.
$C.$ Dew appears on plant leaves on winter nights.
$D.$ Tiny particles shine in a narrow beam of sunlight.
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