National Science Olympiad Forum By SOF Olympiad Trainer - Page 403

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
D

Ans 2:

Class : Class 5
Correct answer - D as Uranus has methane in its atmosphere and Mars has iron dust in the soil

Ans 3:

Class : Class 5
Correct answer - D as Uranus has methane in its atmosphere and Mars has iron dust in the soil

Ans 4:

Class : Class 5
Correct answer - D as Uranus has methane in its atmosphere and Mars has iron dust in the soil

Ans 5:

Class : Class 5

Ans 6:

Class : Class 5
C

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Subject :NSO    Class : Class 5

Two persons X and Y went to see a doctor for their respective diseases. The given box shows what they communicated to the doctor about their illness.
Person X : “I have swollen gums that bleed when I brush my teeth or eat anything. My joints are also swollen and keep paining.”
Person Y : “I am unable to see properly in dim light.”
What can be concluded about these persons?

APerson X does not take citrus fruits in his diet.
BPerson Y is suffering from iron deficiency. So he should take lots of green leafy vegetables in his diet.
CPerson X is suffering from scurvy whereas person Y is suffering from rickets.
DBoth the persons are diseased due to deficiency of vitamins but person X is having vitamin A deficiency and person Y is having vitamin C deficiency.


nice question

Ans 1:

Class : Class 8

Ans 2:

Class : Class 5
A

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
B

Ans 2:

Class : Class 6

Ans 3:

Class : Class 5
good

Ans 4:

Class : Class 5
Guys plz don’t confuse co2 with o2. Also it is c as nitrogen isn’t there. Also d is not ordered correctly

Ans 5:

Class : Class 7
the ans is B

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
I cannot understand it

Ans 2:

Class : Class 5
Not clear

Ans 3:

Class : Class 7
Can someone explain why??🤔

Ans 4:

Class : Class 3
not clear plz explain.aNYbODY hOMe

Ans 5:

Class : Class 6
study more books

Ans 6:

Class : Class 10
IT IS NOT CLEAR CAN SOMEONE EXPLAIN???

Ans 7:

Class : Class 5

Ans 8:

Class : Class 9

Ans 9:

Class : Class 9
answer is D

Ans 10:

Class : Class 7

Ans 11:

Class : Class 9
not clear

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Subject :NSO    Class : Class 7

Four different-sized beakers are filled with water up to the same height. The temperature of the water is same in all four beakers. If we put 100 gram of ice in each beaker, what effect will occur?


A The temperature of water in beaker 2 will change the most.
B The ice will melt fastest in the beaker 3.
C The temperature changes will be same in all four beakers.
D The temperature of the water in beaker 3 will change the most.


how?

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 5

Refer to the given puzzle.

Four components of food are hidden in the given puzzle. Solve the puzzle and select the option which is not hidden in the puzzle.

AIt builds our body and helps in growth.
BIt is an energy giving nutrient that gives more energy than carbohydrate.
CIt helps the body to get rid of undigested food.
DIt keeps our body fit and helps to resist diseases.


how does carbohydrates help in getting rid of undigested food

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Subject :NSO    Class : Class 10

Which of the following statements are correct?
(i) The glass sheet in a solar cooker is responsible for green house effect.
(ii) Acid rain happens because earth’s atmosphere contains acids.
(iii) Biomass is a renewable source of energy.
(iv) Non-conventional sources of energy are nuclear, solar, biomass etc.
(v) Sun can be taken as inexhaustible source of energy.

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


the ans is not correct... (iv) is also correct

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Subject :NSO    Class : Class 7

Read the given statements carefully and select the correct option.
Statement 1 : When an ant bites, it injects formic acid into the skin.
Statement 2 : The effect of the acid can be neutralised by rubbing moist baking soda.

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


Ans 1:

Class : Class 7
yes

Ans 2:

Class : Class 7
The answer has to be option A

Ans 3:

Class : Class 7
yes

Ans 4:

Class : Class 9
your answer is wrong baking soda neutralize forming acid

Ans 5:

Class : Class 8
The answer is option A as baking soda neutralizes the effect of the formic acid

Ans 6:

Class : Class 8
answer should be option a . Baking Soda is used to neutralize forming acid

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