National Science Olympiad Forum By SOF Olympiad Trainer - Page 335

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6

Ans 3:

Class : Class 8
ANS IS 154

Ans 4:

Class : Class 6

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
according to reactivity series K>Na>Ca>Mg>Al>Zn>Fe>Pb>H>Cu>Hg>Ag>Au>Pt the metal should be between Al and Cu and hence Fe is the answer

Ans 2:

Class : Class 9

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
A

Ans 2:

Class : Class 6
The correct answer is (A).

Ans 3: (Master Answer)

Class : Class 1

A

Jute is a fibre obtained from stem of jute plant. Jute is harvested during flowering stage. The stems are cut off close to the ground and are left to dry for sometime. Dried stems are then tied into bundles and soaked in water for about 20 days. This process is called retting. It softens the tissue and permits the fibres to be separated.

 


Ans 4:

Class : Class 6

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

B

The food-chain is starting with X. That means X is a plant (Producers). X is eaten by Y. So, Y must be a Herbivore (for example, animals like deer, rabbit, goat, etc.). And Y is eaten by Z. So, Z must be Carnivore (for example, animals like wolf, lion, hyena, etc.).


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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 10
It should be option C because 2 4-D is a pesticide

Ans 2:

Class : Class 9
It should be C

Ans 3:

Class : Class 9
MCPA is a weedicide, so it should not be A

Ans 4:

Class : Class 4
Simazine is pesticde! The answer must be A

Ans 5:

Class : Class 8
But shouldn't it be option C, as 2 and 4 D are fertilizers.

Ans 6:

Class : Class 9

Ans 7:

Class : Class 8

Ans 8:

Class : Class 8
BHC is also a pesticide the answer is Dgammaxane too is a pesticide from olympiad prep guide bookpls correct your mistake or if i am wrong give a proper solution

Ans 9:

Class : Class 10
The answer should be c as that is the only one that has 2,4D as it's option also the SOF solution says the same but shows a different answer

Ans 10:

Class : Class 8

Ans 11:

Class : Class 8
2 4 -D is a weedicide literally given in ncert too

Ans 12:

Class : Class 9
shouldnt the answer be a? simazine is also a pesticide

Ans 13:

Class : Class 4

Ans 14:

Class : Class 9

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