Subject :NSO Class : Class 5
Subject :NSO Class : Class 3
Ans 1:
Class : Class 4
Ans 2:
Class : Class 3
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Subject :NSO Class : Class 7
Digestive juices were collected from three different regions of the alimentary canal. Drops of these juices were added to wells made in an agar of starch as shown in the given figure.
After an hour, the wells were rinsed with distilled water and flooded with iodine solution. The results are given in the table.
| Well | 1 | 2 | 3 |
| Colour of iodine solution |
Blue-black | Yellow - brown | Yellow - brown |
AWell 1 represents region that contains an enzyme pepsin that causes the breakdown of proteins into simple substances.
BWell 2 could represent region that contains an enzyme called salivary amylase.
CWell 3 could represent region that is the longest portion of alimentary canal and receives bile juice from liver and pancreatic juice from pancreas.
DAll of these
The options are placed wrongly. Well 1 cannot turn blue-black as it has protein. Well 2 should turn blue-black because it has starches. Only option c is correct. The answer is C
Ans 1:
Class : Class 8
Ans 2:
Class : Class 8
I guess the answer is option D.. You see that if well 2 has salivary amylase, then the starch will be converted into simple sugars
=> No starch is found from that well (it has converted to simpler form)
Ans 3:
Class : Class 7
Answer is option B
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Subject :NSO Class : Class 7
Ans 1:
Class : Class 8
Option c is right..
Ans 2:
Class : Class 8
please specify reason
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Subject :NSO Class : Class 3
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 7
The given diagram shows an experimental set-up to study osmosis. Which of the following combinations of liquids would cause liquid X to rise to the highest level in the glass tube after three hours?
| Liquid X | Liquid Y | |
|---|---|---|
| A | Concentrated sucrose solution |
Dilute sucrose solution |
| B | Concentrated sucrose solution |
Water |
| C | Dilute sucrose solution |
Concentrated sucrose solution |
| D | Water | Concentrated sucrose solution |
Ans 1:
Class : Class 8
Ans 2:
Class : Class 8
The answer must be b.. Isn't it?!!
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 10
Ans 1:
Class : Class 10
THE ANSWER FOR THIS QUESTION IS C.BECAUSE WHEN THE RATIO IS 3:2:1 THEN THE FIRST HYDROCARBON MUST BE A AN ALKANE .THUS OPTION ONE IS WRONG.THE SECOND OPTION WILL ALSO BE INCORRECT BECAUSE BROMIN WATER IS APPLICABLE TO UNSATURATED CARBON COMPOUNDS ,AND 2 AND 3 ARE UNSATURATED CARBON COMPOUNDS,SO OPTION TWO IS ALSO WRONG.FINALLUY THE OPTION THREE IS CORRECT AS TOLLENS TEST IS APPLICABLE TO CARBON COMPOUNDS WIT ALDEHYDE GROUP AND 2 AND 3 DOES NOT CONTAIN ALDEHYDE GROUP
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Subject :NSO Class : Class 6
In the given circuit diagram, S1, S2 and S3 are switches.Which of the following switch combinations is correct for the lamp to glow?
| S1 | S2 | S3 | |
| A | Opened | Opened | Closed |
| B | Closed | Closed | Opened |
| C | Opened | Closed | Opened |
| D | Closed | Opened | Closed |
Ans 1: (Master Answer)
Class : Class 1
D
In the given circuit , the bulb will glow when the circuit will complete.For this to happen switch S3 must be closed .Along with this either or both of switch S1 and S2 should be closed.
Ans 2:
Class : Class 5
