Subject :NSO Class : Class 5
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 3
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Subject :NSO Class : Class 3
Ans 1:
Class : Class 3
Ans 2:
Class : Class 3
d
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Subject :NSO Class : Class 6
When Asha suspended four bars of different materials from a pole and brought the North pole of a bar magnet near part P and Q of each bar one by one as shown in figure, then observations she recorded are as follows:
Which of the following sets correctly represents metal bars I, II, III and IV?
| Bar I | Bar II | Bar III | Bar IV | |
| A | Magnet | Stainless steel Bar | Magnet | Iron bar |
| B | Magnet | Iron bar | Magnet | Glass bar |
| C | Stainless steel bar | Magnet | Iron bar | Magnet |
| D | Magnet | Iron bar | Glass bar | Stainless steel bar |
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Subject :NSO Class : Class 3
Ans 1:
Class : Class 3
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Subject :NSO Class : Class 3
Ans 1:
Class : Class 3
c
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Subject :NSO Class : Class 5
Ans 1:
Class : Class 3
error
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Subject :NSO Class : Class 3
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Subject :NSO Class : Class 6
Which of the following is/are correctly matched?
| (i) | Process by which waste materials are used to make new products |
Recycling |
| (ii) | Large open areas used for solid waste disposal |
Landfills |
| (iii) | Biomedical waste | Incineration |
A(i) and (ii) only
B(ii) only
C(i), (ii) and (iii)
D(iii) only
