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Subject :NSO    Class : Class 5

The given graph shows the changes in level of pollution in an area over a time period.

Which of the following can be inferred from the given graph?

AAt point P a lot of forest land was cleared for human consumption whereas at point Q large scale afforestation was done.
BAt point R a new factory was set up in the area.
CPeople cut down the use of fossil fuels in the interval S - T as compared to its earlier usage.
DIntervals R - S and T - U indicate activities like use of bioinsecticides and biopesticides instead of chemicals in farming, use of public transport instead of private transport, etc.


Ans 1: (Master Answer)

Class : Class 1

D

Use of bio-insecticides and bio-pesticides will bring down the pollution level, and Intervals R – S and T – U show the pollution levels coming down.


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Subject :NSO    Class : Class 8

It is possible to make a meaningful word with the second, the third, the ninth, the tenth, the thirteenth, the fourteenth and the eighteenth letters of the word COUNTERINTELLIGENCE, using each letter only once, except the second letter, which should be used twice, which of the following will be the third letter of that word? If no such word can be formed give 'X' as the answer, and if only two such words can be made give answer 'Y'. And if more than two such words can be formed give answer 'Z'.

A C
B X
C Y
D Z


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Subject :NSO    Class : Class 10

Humans inherit colour of their eyes from their parents. Brown-eyed couple has three blue-eyed children. Which of the following statements gives correct explanation of this situation?
(i) Each parent has an allele for brown eyes and an allele for blue eyes.
(ii) The allele for blue eyes is recessive.
(iii) The probability that their next child will have blue eyes is 0.75.
(iv) The probability that their next child will have brown eyes is 0.5.

A (i) and (ii) only
B (i) and (iii) only
C (ii) and (iv) only
D (iii) and (iv) only


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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
yes

Ans 2:

Class : Class 6
C option can be possible.

Ans 3:

Class : Class 6
c can also be possible. i dont understand why we pay to answer questions that are not even proofread.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2: (Master Answer)

Class : Class 1

A


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Subject :NSO    Class : Class 10

Shaheen, a class 10 student studied the speed of the given reaction under different conditions.

In experiment I, she added 1 g of MnO2 (catalyst) to 75 cm3 of 0.4 mol/L H2O2 solution at 30°C In experiment II, she added 1 g of MnO2 to 100 cm3 of 'X' mol/L H2O2 solution at 'T' °(C) She recorded her observations and plotted a graph as shown in the given figure.
The values of X and T in experiment II could be respectively


A 0.30 and 35
B 0.40 and 30
C 0.25 and 30
D 0.30 and 30.


How to find this?

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Subject :NSO    Class : Class 7

Rihan takes an empty half litre plastic bisleri bottle. He opens the lid and fixes his mouth on the opening in such a way that there is no gap between the opening and his mouth. He observes that the bottle crushes inwards when he sucks some air out of the bottle. Which of the following statements is the reason for Rihan’s observation?

AAir pressure inside the bottle increases.
BAir pressure outside the bottle increases.
CAir pressure inside the bottle decreases.
DAir pressure outside the bottle decreases.


Ans 1:

Class : Class 7
Air pressure outside the bottle increases as while drinking the water, the air pressure inside the bottle is reduced as he drinks the water with a force acting towards his mouth. Due to this the amount of air inside reduces and there will be no force exerted on the inner walls of the bottle from the inside.

Ans 2:

Class : Class 7
Air pressure outside the bottle increases as while drinking the water, the air pressure inside the bottle is reduced as he drinks the water with a force acting towards his mouth. Due to this the amount of air inside reduces and there will be no force exerted on the inner walls of the bottle from the inside.

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 3

Select the best suitable means of communication to get informed or to inform others for the given situations (X, Y and Z).
X : Your sister’s marriage has been fixed and you want all your relatives and friends to be present at the wedding.
Y : Your grandfather, suddenly, suffered from a heart attack and your father is in his office.
Z : Incidence of tsunami had occurred in Japan.

X Y Z
A Radio E-mail Postcard
B Letter Telephonic call Newspaper
C E-mail Television Fax
D Fax Newspaper E-mail


Ans 1:

Class : Class 3

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

C


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