National Science Olympiad Forum By SOF Olympiad Trainer - Page 287
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BRahul pillai from Bvm elamakkara , Cochin
Subject :NSO    Class : Class 10

Ans 1:

Janani swethaa from CS ACADEMY, Erode
Class : Class 10

Ans 2:

Shreyansh Samaddar from St.Xavier High School, Raipur
Class : Class 10
YEAH What is this! Answer should be D!!!!!!! What is this!

Ans 3:

Anantha Narayanan M S from NPS Goaplapuram Chennai, Chennai
Class : Class 9
The givern answer is wrong!!!!!!!!!

Ans 4:

Jayati Gupta from Dps, YAMUNANAGAR
Class : Class 6
Q is a metal and S is a non metal, and therefore Q has a greater chance at losing electrons. The correct option is D.

Ans 5:

Janani swethaa from CS ACADEMY, Erode
Class : Class 10
It is wrong. Answer is D

Ans 6:

BRahul pillai from Bvm elamakkara , Cochin
Class : Class 10
what

Ans 7:

BRahul pillai from Bvm elamakkara , Cochin
Class : Class 10
the answer for this question is option D,since Q is more electropositive than s and thus will lose electrons easily .But in the answer key it is given as optionB.

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JADEN GABRIEL ROY from BISHOP REMIGIUS CBSE SCHOOL, NAGERCOIL
Subject :NSO    Class : Class 5

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Twesh Shreeniwas from DPS, Gurgaon
Subject :NSO    Class : Class 8

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SHREYAS ANDOTRA from RYAN INTERNATIONAL SCHOOL, CHANDIGARH
Subject :NSO    Class : Class 7

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Bhagyesh Kamal from DPS, Mumbai
Subject :NSO    Class : Class 8

Ans 1:

Ishaan Pal from Christ Academy, Bangalore
Class : Class 9
why not b??

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Sanskar Gautam from dps, dadri
Subject :NSO    Class : Class 5

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TejMan from Vel's Vidyashram, Chennai
Subject :NSO    Class : Class 8

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Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Subject :NSO    Class : Class 3

Ans 1:

Shibani Pal from cghs, Kolkata
Class : Class 3
all of these

Ans 2:

Vivaan Joshi from Indira National School, Pune
Class : Class 4

Ans 3:

Sushree snehasikta behera from Mother's public school , Bhubaneswar
Class : Class 2
option a speed post

Ans 4:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7

Ans 5:

Shyam Jayesh from Shyam Jayesh, Bangalore
Class : Class 3

Ans 6:

Yatindra G from SBOA, Chennai
Class : Class 4
speed post

Ans 7:

Arjun Bhamare from VIBGYOR HIGH, YERWADA , PUNE
Class : Class 3
the answer seems incorrect. One can send an invitation through all of the available resources. However, if one wants to send invitation speedily, then the option of Speed Post would be more correct.

Ans 8:

Krishiv Chandan Sukul from Seven 11 Scholastic School, Mumbai
Class : Class 6
is all of these.

Ans 9:

Shyam Jayesh from Shyam Jayesh, Bangalore
Class : Class 3

Ans 10:

REYANSH RUDRANSHU from DELHI PUBLIC SCHOOL , DAMANJODI
Class : Class 3

Ans 11:

Samarth Arcot Praveen from National Public School Rajajinagar, Bangalore
Class : Class 4
the question framed incorrectly. It should have been sending wedding card at the earliest

Ans 12:

Jdjdjdj from Delhi public school Bangalore east, Bangalore
Class : Class 3
Speed post

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Eklavya Gondule from DPS Bhilai, BHILAI
Subject :NSO    Class : Class 7

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Tarun S Hampali from National Public School, Bengaluru
Subject :NSO    Class : Class 6

Subhi, a class 6 student grouped together a few changes occurring around us as:
Group 1 : Blooming of flowers, breaking of glass, vaporisation of water, sawing of wood
Group 2 : Tides in the ocean, motion of a swing, landslides, occurrence of day and night
Group 3 : Rusting, germination of seeds, burning of fire crackers, growth of a child
Group 4 : Making a paper boat, blowing air into balloon, baking a roti, heating an iron rod
Select the odd one in each group and mention the property which makes it odd.

  Group 1 Group 2 Group 3 Group 4
A Blooming
of flowers
(Physical
change)		 Tides in
the ocean
(Periodic
change)		 Rusting
(Chemical
change)		 Making a
paper boat
(Physical
change)
B Breaking
of glass
(Irreversible
change)		 Occurrence
of day
and night
(Natural
change)		 Germination
of seeds
(Irreversible
change)		 Blowing
air into
balloon
(Reversible
change)
C Sawing
of wood
(Physical
change)		 Motion of
a swing
(Periodic
change)		 Growth
of a child
(Irreversible
change)		 Heating an
iron rod
(Chemical
change)
D Vaporisation
of water
(Reversible
change)		 Landslides
(Nonperiodic
change)		 Burning of
fire crackers
(Fast
change)		 Baking
a roti
(Chemical
change)


Ans 1:

Siddhartha from Bal Bharati Public school Rohini, Delhi
Class : Class 6
answer should be C

Ans 2:

SHUBHANG SINGH from DELHI PUBLIC SCHOOL REWARI, REWARI
Class : Class 6
Question is not properly framed

Ans 3:

Siddhartha from Bal Bharati Public school Rohini, Delhi
Class : Class 6

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