National Science Olympiad Forum By SOF Olympiad Trainer

Jeronee from Christwood School, PERUMBAKKAM

Subject :NSO Class : Class 3

Select the option in which the odd one among the others is encircled correctly.

A
B
C
D

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

Ans 2:

Shivangi singh from Dps greater Noida, Greater Noida

Class : Class 4

Post Your Answer

Jeronee from Christwood School, PERUMBAKKAM

Subject :NSO Class : Class 3

The given diagram represents the water cycle. Select the INCORRECT option regarding the processes that are labelled as a, b and c.

A In process 'b', the water vapours that rises, cools down to form tiny drops of water which come together to form clouds.
B In process 'a', water from rivers, lakes and seas changes to water vapours due to the warmth of sunlight.
C In process 'c', clouds formed in process 'b' become full and fall back to Earth as rain.
D None of these

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

Submit Your Answers

Post Your Answer

ROHAN from ARMY PUBLIC SCHOOL, DANAPUR CANTT, PATNA-801503, PATNA

Subject :NSO Class : Class 8

Read the following statements carefully and identify X, Y and Z respectively.

(i) X reacts violently with cold water.

(ii) Y reacts with boiling water.

(iii) Z reacts with steam.

(A) Na, Mg, Zn

(B) Na, Zn, Fe

(C) Cu, Zn, Na

(D) Zn, Cu, Na

View All Answers (1)

Ans 1:

prabhkhelSingh from Hra international school, Gurdaspur

Class : Class 6

correct option is A because sodium, being highly reactive,reacts violently with cold water while magnesium reacts only with boiling water.Less reactive metals like zinc and iron react with steam only.Noble metals like gold and silver do not react with water.

Submit Your Answers

Post Your Answer

ROHAN from ARMY PUBLIC SCHOOL, DANAPUR CANTT, PATNA-801503, PATNA

Subject :NSO Class : Class 8

The value of is

(A) 0.039

(B) 0.235

(C) 0.25

(D) 4

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

Submit Your Answers

Post Your Answer

ROHAN from ARMY PUBLIC SCHOOL, DANAPUR CANTT, PATNA-801503, PATNA

Subject :NSO Class : Class 8

On dividing 2272 as well as 875 by 3digit number N, we get the same remainder. The sum of the digits of N is

(A) 10

(B) 11

(C) 12

(D) 13

View All Answers (1)

Ans 1:

Garima Malhotra from National Centre For Excellence, Bengaluru

Class : Class 8

2272-875= perfectly divisible by N, 1397=multiple of N, factorisation of 1397 = 11*127, as 127 is a 3 digit no., N = 127, 1+2+7=10

Submit Your Answers

Post Your Answer

ROHAN from ARMY PUBLIC SCHOOL, DANAPUR CANTT, PATNA-801503, PATNA

Subject :NSO Class : Class 8

If a wire is bent into the shape of a square, then the area of the square is 121/4 sq. cm. When the wire is bent into a semicircular shape, then the area of the semicircle will be

(A) 22 cm ²

(B) 44 cm ²

(C) 77 cm ²

(D) 154 cm ²

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is c.

Submit Your Answers

Post Your Answer

Saurabh Hajra from ,

Subject :NSO Class : Class 5

Viraj found a fruit which he has not seen before. He wanted to find out whether the fruit is scattered in the same way as the Mimosa. He planned to do the following:
i. Throw it in the air.
ii. Examine the 'hooks'.
iii. Place it on his socks.
iv. Open it to look at seeds.
Which of the above actions are useful for his purpose?

A i and ii
B i, ii and iii
C ii and iii
D iii and iv

View All Answers (1)

Ans 1:

Devina kashyap from TPS, Mumbai

Class : Class 4

the answer is not correct as what will happen if you place it on the socks

Submit Your Answers

Post Your Answer

Renu ROY from ,

Subject :NSO Class : Class 8

Read the given statements and mark the correct option.

Statement 1 : Copper sulphate solution is a good conductor of electricity.
Statement 2 : Conduction of electricity takes place in liquids due to flow of ions.

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.

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

Submit Your Answers

Post Your Answer

HARSH NAIK from KLE ENGLISH MEDIUM SCHOOL, SHOLAPUR

Subject :NSO Class : Class 6

Which of the following statements regarding pinhole camera is/are not correct?
(i) Pinhole camera forms real image
(ii) Principle of image formation in pinhole camera is rectilinear propagation of light.
(iii) Pinhole in a pinhole camera acts as the lens.

A(i) only
B(i) and (ii)
C(ii) and (iii)
Dnone of them

good question

View All Answers (0)

Submit Your Answers

Post Your Answer

asher.pedamuthevi from CAL PUBLIC SCHOOL, Hyderabad

Subject :NSO Class : Class 5

WHICH JOINT ALLOWS THE MOVEMENT IN ALL DIRECTIONS?

User Forum

Ans 1: (Master Answer)

Ans 2:

Ans 1: (Master Answer)

Ans 1:

Ans 1: (Master Answer)

Ans 1:

Ans 1: (Master Answer)

Ans 1:

Ans 1: (Master Answer)

Related Links