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Question 1

Two cylindrical containers with different base areas are filled with equal volumes of water. The pressure at the base of the containers is same for both of them.
A) True
B) False

Question 2

A group of students are asked to move a massive rectangular block. In the first attempt, they drag it. They then moveit by placing it on circular logs. The students found it easierto move the massive rectangular block on circular logs.
A) True
B) False

Question 3

The approximate value of speed of sound in glass is ____ m/s.
A) 5000
B) 343
C) 1452
D) 1498

Question 4

For electroplating gold on a copper bangle, the copper bangle is connected to the negative electrode.
A) True
B) False

Question 5

The ____ uses two plane mirror strips, each of which is kept inclined at 45o to the axis of the tube.
A) periscope
B) telescope
C) microscope
D) photographic camera

Question 6

Fruits stored in ploythene bags get decomposed quickly because ____.
A) polythene encourages growth of bacteria
B) of the air present in the bag
C) the moisture generated in the bag does not escape
D) ethene increases the rate of ripenening of the fruit

Question 7

Sulphur, when heated, melts and then burns with a blue flame. If the gas produced in the process is dissolved in water, it forms ____.
A) sulphur trioxide
B) sulphurous acid
C) sulphur dioxide
D) sulphuric acid

Question 8

The invisible zone of a candle flame does not contain carbon.
A) True
B) False

Question 9

Which of the following does not contribute to nitrogen availability in the soil?
A) Decay of organic matter
B) Cyanobacteria
C) Nostoc
D) Rhizobium

Question 10

Which of the following is responsible for transporting water from the root to different parts of a plant?
A) Stomata
B) Phloem
C) Xylem
D) Veins

pls be fast

Dear student!

Due to paucity of time, we could not be able to answer all your queries at once, however we are answering the selected queries and the rest you can do by yourself and if you need a further help you can come to us. we will surely help you in all possible ways! 

1.) B (false)

2.) A (true)

4.) A. (true)

@  Pritisha and  varshini.v.r  you are correct and the explanations are also good. keep it up, you are exploring your knowledge which is always good!

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pls answer this!

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1. B) False

2. A) True

3. A) 5000

4. A) True

5.  A) Periscope

6. C)

7.  B)

8. A) True

9. D) Rhizobium

10. C) Xylem

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thnk u! here's ur thumbs up!

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Welcum once again..!

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yippeee! i have gt these answer !i hv understood it!

1.B)False.Volume of the liquid in a container = base area x height of the liquid.
The height of the liquid is more in the container with smaller base area.
Pressure at a point is directly proportional to the height of the liquid column. Hence, the pressure at the base of the container is not same for the two containers.

2.A)True.When the massive rectangular block is dragged, the type of friction between the surfaces is sliding friction, and when it is moved on circular logs, the type of friction is rolling friction. Rolling friction is less than sliding friction, hence, the students found it easier to move the massive rectangular block on circular logs.

3.A)5000.The approximate value of speed of sound in solids is 5000 m/s, as the range of speed in glass is from 2000 m/s to 6000 m/s depending on the thickness of the glass material.

4.A)True.For electroplating gold on a copper bangle, the copper bangle is connected to the negative electrode and the gold is connected to the positive electrode.

5.A)Periscope.The periscope uses two plane mirror strips each of which is kept inclined at 45o to the axis of the tube.

6.C)the moisture generated in the bag does not escape.Fruits stored in ploythene bags get decomposed quickly because the moisture generated in the bag does not escape, and thus increases the rate of decomposition.

7.B)Sulphorous AcidSulphur, when heated, melts and then burns with a blue flame. The gas produced when dissolved in water forms sulphurous acid.

8.A)True.Complete combustion takes place in the invisible zone of a candle flame, and hence, it does not contain carbon.

9.D)Rhizobium.Rhizobium is a symbiotic bacteria and are responsible for fixation of atmospheric nitrogen.

10.C)Xylem.
Xylem is responsible for transporting water from the roots to different parts of a plant.

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