National Science Olympiad Forum By SOF Olympiad Trainer - Page 831
  1. Home
  2. /  Forum

User Forum

Ask Your Question
dev mishra from Bal Bhavan Public School, New Delhi
Subject :NSO    Class : Class 7

Ans 1:

Abhishek from New Vision the olympiad school, KHAMMAM
Class : Class 7
acid is a word which came from latin "acidus/acidum mean sour.bases are the substances which give bitter in taste.

Ans 2:

Manas Malla from Visakha Valley School, Visakhapatnam
Class : Class 8
Acids are substance which are sour Bases are which are slippery/soapy to touch

Ans 3:

ANSH from DAYANAND PUBLIC SCHOOL, SHIMLA
Class : Class 8
some materials like lemon and vinegar taste sour due to the presence of materials/ chemicals called acids. some materials like baking soda taste bitter due to the presence of chemicals / materials called bases.

Ans 4:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
Acids are the chemicals which contain hydrogen ions and taste sour. They attain a pH value below 7 and are corrosive in nature. Bases are generally hydroxides, carbonates, bicarbonates or oxides of metals and bitter to taste. They attain a pH value above 7 and are soapy to touch.

Post Your Answer

Aakash from Dpsrohini, New Delhi
Subject :NSO    Class : Class 6

Ans 1:

Lakshya Garg from DMI, Meerut
Class : Class 6
miniature circuit breaker

Ans 2:

Achintya k j from KENDRIYA VIDYALAYA GOLE MARKET, NEW DELHI
Class : Class 9
Miniature Circuit Breaker

Ans 3:

Aaryan Maheshwari from MPS Jaipur, Jaipur
Class : Class 6
miniature circuit breaker

Ans 4:

Akhilesh from BGS Public School, Kengeri, Bengaluru
Class : Class 7
" Miniature Circuit Breaker " is the full form of MCB.

Ans 5:

Aditya Mishra from Sri Kumaran Children's Academy, Bengaluru
Class : Class 6
MCB stands for Multiple Circuit Breaker

Ans 6:

Raghav toshniwal from jnana prabodhini prashala, Pune
Class : Class 6
MAIN COURSEBOOK,why?

Post Your Answer

Namratha from JGRVK, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Yatharth from Mayoor School, Noida
Class : Class 6
A COASTAL BREEZE WHICH BLOW FROM SEA TO THE LAND IS DURING THE DAY IS CALLED SEA BREEZE.A COASTAL BREEZE WHICH BLOWS FROM LAND TO SEA DURING THE NIGHT IS SES BREEZE.

Ans 2:

Yatharth from Mayoor School, Noida
Class : Class 6
A COASTAL BREEZE WHICH BLOW FROM SEA TO THE LAND IS DURING THE DAY IS CALLED SEA BREEZE.A COASTAL BREEZE WHICH BLOWS FROM LAND TO SEA DURING THE NIGHT IS SES BREEZE.

Ans 3:

Pramit Bhattacharjee from Billabong High International School, Mumbai
Class : Class 4
land gets heated faster than water does so when the hot air above the land rises up the cool air from the sea moves towards the land keeping that place cool is known as sea breeze. land breeze is mainly there at night.it keeps the sea cool.that wind comes from the land to the sea.

Ans 4:

Pramit Bhattacharjee from Billabong High International School, Mumbai
Class : Class 4
land gets heated faster than water does so when the hot air above the land rises up the cool air from the sea moves towards the land keeping that place cool is known as sea breeze. land breeze is mainly there at night.it keeps the sea cool.that wind comes from the land to the sea.

Post Your Answer

Namratha from JGRVK, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Sarthak Kumar from Delhi Public School, INDORE
Class : Class 7
During the day, land gets heated up much faster than the water in the sea .As the land becomes hot , it heats the air above it. this hot air rises up and the cool air from the sea blows towards the land to take its place . this wind that blows from the sea towards the land during the day is called the sea breeze . At night , the land cools down much faster than the sea which , in turn., cools the air above the land . The air above is still warmer . This warm air rises up and the cool air from the land rushes towards the sea to take its place .This wind that blows from the land towards the sea at night is called the land breeze .

Post Your Answer

Azaan Abdullah from Green Apple Public School, Baddi
Subject :NSO    Class : Class 2

Ans 1:

Animesh Mishra from DPS NORTH BANGALORE, BENGALURU
Class : Class 3
nile is the lonest river.

Ans 2:

Namratha from JGRVK, Bengaluru
Class : Class 5
nile is the longest river in the world

Ans 3:

Pankaj Rajput from RBK GLOBAL SCHOOL, THANE
Class : Class 4
neal river

Post Your Answer

Pranav from Sri Aurobindo Memorial school, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
The uses of ammonium hydroxide are as follows - To manufacture fertilizers like ammonium sulphate To manufacture rayon, dyes, etc.

Ans 2:

dev mishra from Bal Bhavan Public School, New Delhi
Class : Class 9
NH4OH is the chemical name of ammonium hydroxide.It is nitric acid.

Ans 3:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
As an "ink remover" to remove ink off clothes.

Post Your Answer

akshaj shukla from summer fields school, Gurgaon
Subject :NSO    Class : Class 7

Ans 1:

Pranav from Sri Aurobindo Memorial school, Bengaluru
Class : Class 9
neutralisation is when an acid reacts with a base to form a salt and H2O and some heat is liberated galvanisation is when you add a layer of zinc upon iron so that it does not rust

Ans 2:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
Neutralisation is the process of adding base to an acid whereas galvanisation is the process of coating a layer of zinc on iron.

Post Your Answer

Ritesh N Das from Adamas International School, Kolkata
Subject :NSO    Class : Class 6

Ans 1:

Krish Sharma from Delhi Public School, New Delhi
Class : Class 6
the answer is - calcium carbonate

Ans 2:

abhinav from fitjee world school, Hyderabad
Class : Class 8
caco3

Post Your Answer

Vedant Mehta from Bhagwati International Public School, Patan, Gujarat
Subject :NSO    Class : Class 7

Ans 1:

akshaj shukla from summer fields school, Gurgaon
Class : Class 7
pH is a scale used to specify the acidity or basicity of an aqueous solution

Ans 2:

ANSH from DAYANAND PUBLIC SCHOOL, SHIMLA
Class : Class 8
pavour hydrogine

Ans 3:

Pulkit mittal from GAIL DAV PUBLIC SCHOOL, AURAIYA
Class : Class 9
potense of hydrogen or power of hydrogen is basically a test used to determine strengh of a acid or a base.

Ans 4:

Pranav from Sri Aurobindo Memorial school, Bengaluru
Class : Class 9
no full form available

Ans 5:

Manas Malla from Visakha Valley School, Visakhapatnam
Class : Class 8
pH means power of hydrogen

Ans 6:

Julian Thomas Abraham from Madhava Kripa school , Manipal
Class : Class 8
It is the negative logarithm of H+ ions

Ans 7:

riddhikaa from sri kumaran public school, Bengaluru
Class : Class 7
The full form is povouir hydrogene

Ans 8:

Gyanajyoti Mishra from J.N.V., Jajpur
Class : Class 10
pH means power of hydrogen/ povouir hydrogen, means concentration of hydrogen ions in an aqueous solution.So it is used to identify whether a substance is acid,base or neutral.

Post Your Answer

dev mishra from Bal Bhavan Public School, New Delhi
Subject :NSO    Class : Class 7

Ans 1:

G. Priyanka from Chennai Public School, Chennai
Class : Class 8
bases that are completely soluble in water

Ans 2:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
Alkalis are water-soluble bases. They are spelt 'alkalis and not alkaleis'.

Ans 3:

Manas Malla from Visakha Valley School, Visakhapatnam
Class : Class 8
Alkalies are the bases which are soluble in water

Ans 4:

Vedant Mehta from Bhagwati International Public School, Patan, Gujarat
Class : Class 8
Alkalies are the bases that are soluble in water.Some bases are not soluble in water they are not called alkalies

Post Your Answer