National Science Olympiad Forum By SOF Olympiad Trainer - Page 405
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Sarisha Agarwala from dhirubhai ambani international school, Mumbai
Subject :NSO    Class : Class 7

Read the given statements carefully and select the correct option.
Statement 1 : When an ant bites, it injects formic acid into the skin.
Statement 2 : The effect of the acid can be neutralised by rubbing moist baking soda.

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.
DBoth statements 1 and 2 are false.


Ans 1:

Dhruva from VSSIPS, Bangalore
Class : Class 7
The answer has to be option A

Ans 2:

Aditi Anurag from RBK Kanakia School, Thane
Class : Class 8
The answer is option A as baking soda neutralizes the effect of the formic acid

Ans 3:

Bhargavi from bvb, Pune
Class : Class 7
yes

Ans 4:

from Podar International School,Dhule, Dhule
Class : Class 8
answer should be option a . Baking Soda is used to neutralize forming acid

Ans 5:

soumil srivastava from dps, paradip
Class : Class 9
your answer is wrong baking soda neutralize forming acid

Ans 6:

Amogh from Sindhi High School, Bangalore
Class : Class 7
yes

Post Your Answer

divanshi from sacred heart convent school, barnala
Subject :NSO    Class : Class 9

Post Your Answer

Alvin Anto Ambooken from Stfrancisicse, Bangalore
Subject :NSO    Class : Class 3

Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
D

Ans 2:

Aneesh Balaji from BVBARR school, Hyderabad
Class : Class 4
d

Post Your Answer

Shreetej from Pearson public school, Pune
Subject :NSO    Class : Class 5

Ans 1:

Cheshika batra from Our lady of Fatima convent school, Patiala
Class : Class 5
H

Ans 2:

Pracheta Satapathy from Cygnet Public school, Pune
Class : Class 6
answer option(d)ie H

Post Your Answer

Manav from TFS Gunjur, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

SAI KRISHNA from SHISHYA BEML PUBLIC SCHOOL, BANGALORE
Class : Class 3

Ans 2:

Devabhrith from Delhi Public School Electronic City Bangalore, Bengaluru
Class : Class 8
A . cereals , potatoes

Ans 3:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA
Class : Class 4
B

Ans 4:

PRACHURJYA GOGOI from Carmel School, Jorhat
Class : Class 3
B

Ans 5:

bswarajya from Mount Litera Zee School, Bengaluru
Class : Class 5
B-green leafy vegetables

Ans 6:

Sonal from Vibgyor , Gujarat
Class : Class 5
A

Post Your Answer

Deepak Vijayaragavan from Greenwood High, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA
Class : Class 4
D

Ans 2:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA
Class : Class 4
D

Ans 3:

Siddharth Laxmisha from The Study Lecole Internationale, PUDUCHERRY
Class : Class 8
Answer is D as both precipitation and condensation are involved in formation of dew in humid nights. The water vapor condenses to form clouds. But, if precipitation was not there, the dew would have remained in the clouds! So, precipitation is also involved in formation of dew on humid nights. Q and R are condensation and precipitation respectively. Thus, the answer is D(condensation and precipitation) and not B(only condensation).

Post Your Answer

TRIYA SOUMIK NATH from SYMBIOSIS PRIMARY SCHOOL, PUNE
Subject :NSO    Class : Class 7

Three similar light bulbs are connected to a constant voltage d.c supply as shown in the diagram. Each bulb operates at normal brightness and the ammeter (of negligible resistance) registers a steady current.

The filament of one of the bulbs breaks. What happens to the ammeter reading and to the brightness of the remaining bulbs?

Ammeter reading Bulb brightness
A Increase Increase
B Unchanged Unchanged
C Decrease Unchanged
D Decreases Decreases


The correct answer should be D because when current decreases,brightness also decreases

Ans 1:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9
Since it is in a parallel circuit, resistance offered is more after one of the bulbs is fused. This will increase the brightness of the bulb but decrease the ammeter reading since current is inversely proportional to resistance

Ans 2:

Mahima from APS, lucknow
Class : Class 7

Ans 3:

Sargah Surya from bgsnps, Bengaluru
Class : Class 4
how come??

Post Your Answer

SUBHADEEP MOHAPATRA from DAV PUBLIC SCHOOL , ANGUL
Subject :NSO    Class : Class 5

Ans 1:

Cheshika batra from Our lady of Fatima convent school, Patiala
Class : Class 5
A

Ans 2:

Pracheta Satapathy from Cygnet Public school, Pune
Class : Class 6
non of these as all the options are true

Ans 3:

Pracheta Satapathy from Cygnet Public school, Pune
Class : Class 6
non of these as all the options are true

Post Your Answer

anika from St Joseph sen sec school Mahoba, Kulpahar
Subject :NSO    Class : Class 5

Ans 1:

Cheshika batra from Our lady of Fatima convent school, Patiala
Class : Class 5
D

Ans 2:

Navya GUPTA from dps noida, Noida
Class : Class 3

Ans 3:

Pracheta Satapathy from Cygnet Public school, Pune
Class : Class 6
the answer will be d as all are present in the grid

Ans 4:

Shreyasi Padihary from The Cambridge International School , Bangalore
Class : Class 6
Ans is B. It is an error. Option B should display-'The main mineral present in this SEDIMENTARY rock is quartz' and the answer to that is Sandstone which is present in the grid

Ans 5:

BHAVYA from iswk, Oman
Class : Class 6
answer is B. the main mineral present in this rock is quartz-sandstone sandstone can be found in the grid so it is the answer.

Ans 6:

Shaurya Gote from KV BSF Dantiwada, S K Nagar
Class : Class 5
COAL IS NOT BLACK GOLD. ITS BLACK DIAMOND.............PETROLEUM IS NOT BLACK DIAMOND. ITS BLACK GOLD....................................................

Post Your Answer

sandeep mittal from HAL PUBLIC SCHOOL, BANGALORE
Subject :NSO    Class : Class 4

Ans 1:

Savya Sanjay Agarwal from Don Bosco High School, Naigaon East
Class : Class 4

Ans 2:

Bushra aslam from uttam, Ghaziabad
Class : Class 8
A is correct answer!

Ans 3:

Dyutimaan Nikam from lions english school, silvassa
Class : Class 4
Ans a because C is for tearing food D for grinding and B are not permanant

Ans 4:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA
Class : Class 4
A

Ans 5:

Bushra aslam from uttam, Ghaziabad
Class : Class 8
How can a be the Ans?

Ans 6:

Dyutimaan Nikam from lions english school, silvassa
Class : Class 4

Ans 7:

Aarnav Grover from Anand Niketan Shilaj, Ahmedabad
Class : Class 9
answer is A

Post Your Answer