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Meghraj Padwal from ST THOMAS ENGLISH SCHOOL, KALYAN
Subject :NSO    Class : Class 8

Plant X is a vascular and invasive plant species that grows densely over the surface of a lake at a very high rate, due to pollution in water. It has been linked to oxygen depletion of the water, in spite of the fact that it is photosynthetic. Which of the following accounts for this contradiction?

AWhile being photosynthetic, X consumes oxygen at a faster rate than it releases the same, because of its high rate of growth.
BBecause X is highly invasive, it incorporates a large quantity of oxygen in its biomass.
CWhen X dies, the bacteria that decompose its dead body consume the oxygen dissolved in water and grow rapidly.
DNone of these


Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

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Meghraj Padwal from ST THOMAS ENGLISH SCHOOL, KALYAN
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is b.

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Meghraj Padwal from ST THOMAS ENGLISH SCHOOL, KALYAN
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is B.

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Meghraj Padwal from ST THOMAS ENGLISH SCHOOL, KALYAN
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

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Meghraj Padwal from ST THOMAS ENGLISH SCHOOL, KALYAN
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

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Arunangshu Karmakar from Salt Lake School (English Medium), Kolkata
Subject :NSO    Class : Class 6

Ans 1:

ramesh datta from DPS dwarka , New Delhi
Class : Class 7
answer should be b because at noon there is at least some shadow

Ans 2:

ramesh datta from DPS dwarka , New Delhi
Class : Class 7
the answer could be c also as the shadow's length is increasing as time passes. but, it shows that at noon, there is no shadow. in b option there is at least some at noon, so it will be option b

Ans 3:

DIBYAJYOTI ROUTRAY from Stewart school, Cuttack
Class : Class 6
c should be the correct answer

Ans 4:

karthik from , tirupur
Class : Class 7
C is the correct answer

Ans 5:

karthik from , tirupur
Class : Class 7
How?

Ans 6:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
it should be c as sun is just over head

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Arunangshu Karmakar from Salt Lake School (English Medium), Kolkata
Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1: Groundwater is safe for drinking.
Statement 2: Groundwater is free from soluble impurities.

ABoth statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
CStatement 1 is correct but statement 2 is incorrect.
DBoth statements 1 and 2 are incorrect.


SOF tells that the answer is A. But Statement 2 is incorrect as we get Iron, Magnesium and Calcium Sulphates and Oxides dissolved in ground water. I think C should be correct.

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arush tiwari from dps varanasi, Varanasi
Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement-1 : The brightness of the bulb A remains the same after the switch is closed.
Statement-2 : The voltage across elements in parallel is the same.


A Both statements-1 and 2 are true and statement-2 is the correct explanation of statement-1.
B Both statements-1 and 2 are true but statement-2 is not the correct explanation of statement-1.
C Statement-1 is true and statement-2 is false.
D Both statements-1 and 2 are false.


I think answer is A

Ans 1:

Anurag Basistha from Prudence School Dwarka 16 B, Delhi
Class : Class 8
Please check the correctness.

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deepakdashora@rediffmail.com from na, Udaipur
Subject :NSO    Class : Class 6

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A Andriya from Lalaji Memorial Omega International School, Chennai
Subject :NSO    Class : Class 4

Ans 1:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar
Class : Class 4
Ans should be A not c, since the container can measure only one quantity like 5 ltrs , but option A can measure different amount of water.

Ans 2:

AARUSH from DPS, Mumbai
Class : Class 4
C

Ans 3:

Arkoprava Dey from Techno India Group Public School, Coochbehar, Coochbehar
Class : Class 4
answer is A

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