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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
By the help of Photon.

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Subject :NSO    Class : Class 6

Aarushi took two food samples X and Y in separate test tubes. She added 2-3 drops of Benedict’s solution in food sample X and heated it while she added two drops of copper sulphate solution and few drops of caustic soda solution in food sample Y. She observed that sample X turned brick-red while sample Y turned purple.
Which of the following is correct regarding X and Y?

A X consists of protein while Y consists of starch.
B X consists of sugar while Y consists of protein.
C X consists of starch while Y consists of protein.
D X consists of sugar while Y consists of starch.


Ans 1:

Class : Class 7
The answer is actually C because starch consists of carbohydrates and sugars, but sugars is not the exact answer.

Ans 2:

Class : Class 7
the correct answer is B

Ans 3:

Class : Class 7
Answer is c

Ans 4:

Class : Class 6
B is the correct answer

Ans 5:

Class : Class 7
answer is b

Ans 6:

Class : Class 7
The correct answer is b

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Subject :NSO    Class : Class 4

Rohit performed an experiment wherein he set up three test tubes as shown in the figure. Select the INCORRECT statement regarding this.


ATest tube P will have most carbon dioxide after three hours.
BTest tube Q will have least oxygen after three hours.
COrganisms in test tube R will survive for a longer time as compared to organisms in test tubes P and Q.
DNo oxygen will remain in test tube P after some time.


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Ans 1:

Class : Class 4
B

Ans 2:

Class : Class 4

Ans 3:

Class : Class 5

Ans 4:

Class : Class 4

Ans 5:

Class : Class 3

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
why stomata?

Ans 2:

Class : Class 3

Ans 3: (Master Answer)

Class : Class 1
The correct answer is D.

Ans 4:

Class : Class 4
d

Ans 5:

Class : Class 3
the correct answer is d

Ans 6:

Class : Class 4
Ans is D

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7

Ans 3:

Class : Class 9
the field line travels from north to south

Ans 4:

Class : Class 7

Ans 5:

Class : Class 7

Ans 6:

Class : Class 6

Ans 7:

Class : Class 6
sof has given c which is wrong

Ans 8:

Class : Class 6
The correct answer is (D) because the the magnetic field travels from north to south.

Ans 9:

Class : Class 9

Ans 10:

Class : Class 7
understood?

Ans 11:

Class : Class 7

Ans 12:

Class : Class 7
the answer is d because the field lines of a magnet always travle from north to south

Ans 13:

Class : Class 9

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
C

Ans 2:

Class : Class 7
here option c holds true because in option a and b we can make an exception with pulmonary artery and vein.

Ans 3:

Class : Class 8

Ans 4:

Class : Class 8

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
Yes, the answer is option "C". It is not true that arteries will always carry oxygenated blood and the veins will always carry deoxygenated blood (pulmonary vein and artery).

Ans 7:

Class : Class 8

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
a and c both are correct answers

Ans 2:

Class : Class 6
you are correct Pragun goel . my answer is also a.

Ans 3:

Class : Class 6
sea snakes also breathe through skin so option 1 should also be correct.

Ans 4:

Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
Molars and Premolars are mainly used to chew the food.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7
Is D. ✔

Ans 5:

Class : Class 7

Ans 6:

Class : Class 7
Can someone pls send the explanation of why it's D🙏

Ans 7:

Class : Class 7

Ans 8:

Class : Class 3

Ans 9:

Class : Class 3
such questions r always confusing.................

Ans 10:

Class : Class 7
The solution: Enzyme X works best and increases the rate of reaction at an acidic pH (less than 7) of about two2️⃣ ! Enzyme Y is very very very very very very very very very very very very very very very very very efficient @ slightly acidic pH i.e., slightly less than seven!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Enzyme Z is most efficient at an alkaline pH (more than 7!!!). And alkali means a base which is soluble in water. In humans, gastric juice of stomach (a J-shaped bag with thick inner walls. Meh.) has pH in the range of 1.5-2.5, where enzymes such as pepsin, rennin etc. carry out the digestion of food. Thus, enzyme X can be found in stomach. Similarly, the saliva in the mouth of humans has sliiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiightly acidic pH of 6.8, where salivary amylase enzyme is moooooooooooooooooooooooooooooooooooooooost effective! Thus, enzyme Y can be found in the buccal cavity. Small intestine has slightly alkaline pH of 7.8, where enzymes such as trypsin help in digestion of food. So, enzyme Z can be found in duodenum. Morus Alba is the scientific name of mulberry.

Ans 11:

Class : Class 7

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