National Science Olympiad Forum By SOF Olympiad Trainer

Aditya Sai Vemparala from Amanora school, Pune

Subject :NSO Class : Class 6

Which of the following would help us to reduce the amount of water brought from other countries ?

(i) Boiling water after use

(ii) Recycling water

(iii) Obtaining water from the sea

(iv) Building more reservoirs to collect rainwater

(A) (ii) only

(B) (i) & (iii)

(C) (ii) & (iv)

(D) (ii), (iii) & (iv).

Ans 1:

Gauri Singh from St. John's School, Marhauli, Varanasi

Class : Class 10

I think option d is correct

Post Your Answer

Katikela Aruna from Sri Chaitanya olympaid, Vijayawada

Subject :NSO Class : Class 6

Electric heaters used for cooking have the filament or the heating coil on a plate made up of clay because

(A) Clay can be mould in any shape

(B) Clay is a bad conductor of electricity

(C) Both (A) and (B)

(D) None of these.
Clay can be mould in any shape why option c [both a and b] is incorrect

Post Your Answer

Dev Rawat from R D Rajpal School, New Delhi

Subject :NSO Class : Class 7

Which of the fibres obtained from fleece of sheep are used for making wool?

(A) The coarse beard hair

(B) The soft under hair close to skin

(C) Both of these

(D) None of these.

Ans 1:

AAYUSH JHA from DPS BOPAL AHMEDABAD, Ahmedabad

Class : Class 8

THE ANSWER IS [B]

Ans 2:

AAYUSH JHA from DPS BOPAL AHMEDABAD, Ahmedabad

Class : Class 8

THE ANSWER IS [B]

Ans 3:

Khwahish Sharma from Oakfield Public School , Jaipur

Class : Class 7

The answer should be B because we cannot make wool from beard of any animal.

Ans 4:

arijit paul from New Town School, Kolkata

Class : Class 9

ans is D

Ans 5:

arijit paul from New Town School, Kolkata

Class : Class 9

ans is D

Ans 6:

Shrijan Sanjit Pal from Lakshadham High School, Mumbai

Class : Class 7

The answer is B

Ans 7:

Shrijan Sanjit Pal from Lakshadham High School, Mumbai

Class : Class 7

The answer is B

Post Your Answer

Aditya Sai Vemparala from Amanora school, Pune

Subject :NSO Class : Class 6

Study the circuit carefully and answer

What does the above circuit diagram shows ?

(A) A closed circuit

(B) A circuit tester

(C) A circuit with key opened

(D) A circuit with key closed.

Post Your Answer

tanmay shinde from Delhi Public school Rau Indore , indore

Subject :NSO Class : Class 2

Total number of sleeping, standing and slanting lines in the following figures respectively are_______.

A 8, 6, 9
B 8, 6, 8
C 8, 7, 9
D 9, 6, 10

please solve this question

Ans 1:

ALICE from Delhi Public School, UDAIPUR

Class : Class 8

slanting line should be 10

Post Your Answer

Pulkit Khanna from DELHI PUBLIC SCHOOL RUBY PARK KOLKATA, Kolkata

Subject :NSO Class : Class 7

Which of the following is not a source of electric current?

(A)

(B)

(C)

(D)

Ans 1:

Pulkit Khanna from DELHI PUBLIC SCHOOL RUBY PARK KOLKATA, Kolkata

Class : Class 9

Ans 2:

AAYUSH JHA from DPS BOPAL AHMEDABAD, Ahmedabad

Class : Class 8

ANSWER IS ELECTROMAGNET

Ans 3:

Ayaan from DPS DLF City Phase-2, Gurugram

Class : Class 7

Ans is D(ELECTROMAGNET)

Ans 4:

Khwahish Sharma from Oakfield Public School , Jaipur

Class : Class 7

Answer d is correct because car batteries provide electricity to the cars,so it is a source of electricity and dry cells is a type of battery commonly used for portable electrical devices. It provide energy to many things which we daily use like TV remotes , rc cars , torches etc . Dinamo is also a source of electricity . But electromagnet does not provide us electricity/ energy .