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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Child's play though. calorific value=heat/unit mass of the fuel burnt =180,000/4.5 =40000 kJ/kg it is a question from our very own NCERT TEXTBOOK.

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
totally wrong

Ans 2:

Class : Class 8
Sulfur dioxide and chlorine are not produced because CNG is composed of methane. The fact that it produces large amount of carbon dioxide is not helpful or advantageous by any means. Whether it is used in compressed form or not does not make it eco-friendly; but, yes, it produces no smoke SPM upon combustion. So correct answer is (B).

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Subject :NSO    Class : Class 8

Which of the following are possible advantages of using bacteria in sewage treatment?
(i) Bacteria multiply quickly, thus producing a cheap and abundant source of enzymes.
(ii) Only one type of bacteria is required to provide the various enzymes necessary for different kinds of wastes.
(iii) Bacteria can break down waste under anaerobic or aerobic condition.

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


is only one kind of bacteria required to provide the various enzymes necessary for different kinds of wastes?because it was given so in the summary but in the solution it is showing this statement as false

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Subject :NSO    Class : Class 6

Manisha took some vinegar in a test tube and added some baking powder to it. Then she lit a matchstick and brought it near the mouth of the test tube. The flame of matchstick got extinguished.
Which of the following is correct conclusion regarding the given experiment?

A Carbon dioxide gas does not support burning.
B Air contains carbon dioxide.
C Oxygen gas present in the air is necessary for burning.
D Oxygen gas can extinguish fire.


Ans 1:

Class : Class 6
A: Carbon dioxide gas does not support burning.

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Subject :NSO    Class : Class 6

Raveena covered a beaker of boiled water with a metal tray as shown in the diagram.

The beaker and metal tray were then removed from the tripod stand and left on the table. After two minutes, which of the following can be observed?

A Water droplets are seen on the outer part of metal tray.
B Water droplets are seen on the inner part of tray and inner part of the beaker.
C Water droplets are seen on the inner part of metal tray and outer part of the beaker.
D Water droplets are seen on the outer part of beaker only.


Ans 1:

Class : Class 5
B

Ans 2:

Class : Class 6
yeahhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

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Subject :NSO    Class : Class 7

Read the given data and select the correct option for the following questions.
Raman carried out an experiment to find out how fast water can pass through four different types of soil. He put each type of soil in four pots with equal sized holes at the base and placed separate dishes at their bottom to collect water. He poured water in them one by one, and used a stopwatch to record the time taken for water to reach the level he had marked same in each dish. His recording is given in the table as shown below.


Which soil is the most suitable for a plant that thrives in wet and clayey soil?

A W
B X
C Y
D Z


BIT GOOD

Ans 1:

Class : Class 7
D

Ans 2:

Class : Class 7
IT IS C

Ans 3:

Class : Class 7
BIT GOOD

Ans 4:

Class : Class 7
It's surely D

Ans 5:

Class : Class 7
HURRAYWOWALASBEWAREBRAVO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
By tribal mushroom logical kick from Ne thug girl

Ans 2:

Class : Class 7
The answer is ( a) . whoever posted the first answer is wrong.the answer is (a ) because the length of the shadow is the shortest at noon

Ans 3:

Class : Class 6
the shadow will be none(null) according to theory that there shall be no shadow at all. thus the answer is (D)

Ans 4:

Class : Class 7
By tribal mushroom logical kick from New

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Answer: B Explanation: Arrange the Question mathematically to get the following:- (1617/ 7) X 6 because 1617/7's 6th multiple is written in this way - (1617/ 7) X 5 because 1617/7's 5th multiple is written in this way. Calculate this like this:- 1617 / 7 = 231. So, (1617/ 7) X 6 = 231 X 6 = 1386 And, (1617/ 7) X 5 = 231 X 5 = 1155. Thus, we can calculate, 1386-1155 = 231 Hence, option B, with 231 as the answer, is correct.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
what does the arrow head represent?

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