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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

The given graph shows net uptake and net release of oxygen by a plant kept in open over a 24 hour period.
Which of the following holds true regarding the given graph?


A At 0800 hour, the oxygen taken up by plant in respiration is equal to oxygen released by it during photosynthesis.
B Plant is respiring throughout the 24 hour period but it is photosynthesising only between 0600 hours to 1800 hours.
C Assuming that the plant has the same respiration rate throughout 24 hour period, 70 mg of oxygen is produced by plant at 1600 hour.
D The highest rate of photosynthesis occurs at 1200 hour.

Ans 1:

from Sri Chaitanya Techno School, Bengaluru
Class : Class 9

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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

Which of the following statements are incorrect?
I. Decomposition reactions are generally carried out by heating or by passing electricity.
II. An oxidising agent removes hydrogen from other substance.
III. In precipitation reactions, two substances react in solid state to form a soluble product.
IV. Precipitation and neutralisation reactions are examples of single displacement reaction.

A I and III only
B III and IV only
C II and IV only
D All of these.

Ans 1:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM
Class : Class 7
B

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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

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shrawan azad from DPS VASANTKUNJ NEW DELHI, New Delhi
Subject :NSO    Class : Class 6

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
C is correct answer

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shreyash rawat from podar international school, pune
Subject :NSO    Class : Class 4

Ans 1:

xyz from cambridge, Jalandhar
Class : Class 7
D

Ans 2:

shreyash rawat from podar international school, pune
Class : Class 5
its D

Ans 3:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
its a********************

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AMAN SAIKIA from DELHI PUBLIC SCHOOL DULIIAJAN, DULIAJAN
Subject :NSO    Class : Class 7

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avsonawane from Bhartiya Vidya Bhavan, Pune
Subject :NSO    Class : Class 4

Read the following sentences with blanks in them. Select the option which correctly fills up the blanks in any two sentences.
(1) _________ provide door to door service.
(2) _________ carries country's largest amount of bulky goods like coal, cement, food grains, fertilizers, petroleum, automobiles, etc. from mines to industries and from industries to the areas of consumption.
(3) _________ is a better mode of transportation in reference to cross-continental transfers.
(4) _________ is very useful at the time of natural or any other calamities for saving people or supplying goods.
(5) Indian _________ service has the largest network in the world.

A 3 - Railways, 5 - Postal
B 3 - Water transport, 4 - Air transport
C 2 - Inland waterways, 5 - Telephonic
D 2 - Air transport, 1 - Roads


Ans 1:

Keanna from APG, MUMBAI
Class : Class 5

Ans 2:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 5

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Aadya from Vidyashilp , Bangalore
Subject :NSO    Class : Class 4

Ans 1:

Aarnav Grover from Calorx olive international school, Ahmedabad
Class : Class 5
a is the correct answer Natural fibres

Ans 2:

xyz from cambridge, Jalandhar
Class : Class 7
A

Ans 3:

Apoorva Gaurav from DAV, Muzaffarpur
Class : Class 5
Option a is correct

Ans 4:

Apoorva Gaurav from DAV, Muzaffarpur
Class : Class 5
Option a is correct

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