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AJAY KULSHRESHTHA from ,
Subject :NSO    Class : Class 4

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ankitadasgupta from dps, Bengaluru
Subject :NSO    Class : Class 7

Read the following statements and select the correct option.
Statement 1: Water present in oceans and seas cannot be used directly for human consumption.
Statement 2 : Water in oceans and seas have less amount of dissolved oxygen.

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.
DStatement 1 is false but statement 2 is true.


answer is wrong, if it is correct please explain. (as far as i know salt water is supposed to dissolve less oxygen.

Ans 1:

Sriyansh from Surabhi , Hosapete
Class : Class 9
answer is B.

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Aarush from Podar, Mumbai
Subject :NSO    Class : Class 4

Ans 1:

Vimala from Narayana, Bangalore
Class : Class 4

Ans 2:

Adithi Keshava from National Center For Excellence , Bangalore
Class : Class 7

Ans 3:

Vimala from Narayana, Bangalore
Class : Class 4

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Theertha Uday from Holy Angels ISC School, Trivandrum
Subject :NSO    Class : Class 3

Ans 1:

Aarush from St Joseph sen sec school Mahoba, Kulpahar
Class : Class 6
It seems the boy likes odd numbers and dislikes even numbers so he should like Option D as it is odd.

Ans 2:

Admin from Revisewise, Noida
Class : Class 3
Answer: D

Solution ;
The boy likes Odd numbers, so 625 will be the answer, as other three numbers are Even.

Ans 3:

Nivedita Srikant from St. John's Universal School, Mumbai
Class : Class 3
the boy likes odd and dislikes even numbers

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Dhev Arjun from NARAYANA OLYMPIAD SCHOOL, Chennai
Subject :NSO    Class : Class 5

Ans 1:

Rabi rajak from SHREE JAIN VIDYALAYA, Kolkata
Class : Class 5
And:D

Ans 2:

Sumit G from Greenwood High International, Bengaluru
Class : Class 8
A

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Indranil Mukherjee from ryan international school, Bengaluru
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

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Rajani Prabhakaran from ,
Subject :NSO    Class : Class 6

Few processes are given below along with one word used for the change involved. Which of the given terms does not match with the process?

A The perfume from the bottle that you left open last evening was empty in the morning. - Evaporation
B You put a lid on the cup containing hot tea, the inside of the lid gets wet. - Condensation
C You took out few ice cubes from the freezer and put in a glass. After some time, there was only water, no ice. - Sublimation
D The sweetened milk which you kept in the freezer last night has become ice cream now. - Freezing


Search for C and then see

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CHANDRA MOHAN REDDY from dps harni, Vadodara
Subject :NSO    Class : Class 8

Ans 1:

Bhavya Sheth from Bright Day School, Vadodara
Class : Class 5
Concave mirrors are used in solar cookers. as concave mirrors are converging, the are used to concentrate the sun's heat on the utensil.

Ans 2:

SUBRATA MUKHERJEE from ,
Class : Class 7
I think plane mirrors can also do it to some extent but more prominent is concave

Ans 3:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 6
the answer is B

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Nipun sharma from gail dav public school, Auraiya
Subject :NSO    Class : Class 7

Ans 1:

Dr D Martin from Harvard School pf Physics, Boston
Class : Class 1
C is the correct answer. I teach Physics. The angle of incidence entering and exiting is the same due to the same medium.

Ans 2:

Aditya kumar from Sapphire International School, Noida
Class : Class 8
ITS OPTION "C" AS SOME OF THE LIGHT REFRACTS IN WATER AND AIR

Ans 3:

anirudh_suresh@rocketmail.com from bangalore international academy, Bengaluru
Class : Class 7
B IS THE CORRECTONE. BELIVE ME

Ans 4:

Aditya kumar from Sapphire International School, Noida
Class : Class 8
Its "c" because some of the light rays get refracted

Ans 5:

Senthil Kumar from ARB INTERNATIONAL SCHOOL, Coimbatore
Class : Class 7
I THINK SO ANSWER IS C

Ans 6:

KISHORE KUMAR E from MAHARISHI INTERNATIONAL RESIDENTIAL SCHOOL, SUNGUVARCHATHIRAM
Class : Class 9
ANSWER a. Refraction of light and the direction of refraction depends upon the density of the object because it reduces the speed of light.the Flint glass is more denSer than water and the air is no too denSer so there will be no refraction in the caSe of air. Therefore light refracts in water and the glass. ANOTHER REASON!: Light travalS on a straight line .

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Arka Chakraborty from St. Patrick's Academy, Bengaluru, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 5
question is wrong

Ans 2:

Bushra aslam from uttam, Ghaziabad
Class : Class 5

Ans 3:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 5

Ans 4:

Bushra aslam from uttam, Ghaziabad
Class : Class 5
??????????????what?????????????????what???????????

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