National Science Olympiad Forum By SOF Olympiad Trainer

Pramit Roy from Rabindra Bharthi Global School, Kolkata

Subject :NSO Class : Class 5

Refer to the given classification chart of rocks. Select the option that correctly matches the rocks (X, Y, Z) to its characteristic

A X Marble , Y Granite , Z Limestone
B X Sandstone , Y Marble , Z Slate
C X Granite , Y Quartzite , Z Limestone
D X Limestone , Y Gneiss , Z Slate

the answser will be C

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atharva from St John's High School, Mumbai

Subject :NSO Class : Class 8

Select the correct water image of the given figure.

A
B
C
D

how it is

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Ans 1:

Naresh Gadhwal from ryan, Mumbai

Class : Class 8

b

Ans 2:

Aakarsh Jain from Vivkenand School, New Delhi

Class : Class 8

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abhinav from seven days Adventist higher secondary school , ahemdabad

Subject :NSO Class : Class 3

Which of the following clocks shows the time 2 hrs 20 minutes after 9 : 40 a.m.?

A
B
C
D

it is 12:00 bacuse we add in 9:40 20=10:00 AND 10:00 2 HOURS = 12:00

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Ans 1:

Sagnik Biswas from ST. MARY'S ORPHANAGE AND DAY SCHOOL , Kolkata

Class : Class 3

Ans 2:

Sreyan from Sanskriti The School, Hyderabad

Class : Class 3

ddddddddddddddddddddddddd

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Pradumm Raj from Sacred Heart Centenary Academy, Jhansi

Subject :NSO Class : Class 6

Some blobs of wax are placed on a silver ring as shown in the diagram. If the ring is heated at X, then choose the correct option regarding the melting of wax because of heating.

AOnly R blob melts.
BBlobs R, S and Q melt together.
CMelting of blobs occurs in the order R, Q, S and P.
DP, Q, R and S blobs melt together.

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Shweta Garg from Vibgyor high, Vadodara

Subject :NSO Class : Class 9

Two plane mirrors are inclined to each other at an angle of 45°. A ray of light is incident on mirror I and is reflected by mirror I and later by the mirror II. The total deviation of the ray for the given situation is

A45°
B130°
C180°
D90°

answer should be 180 rad

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Mrigank Roy from Delhi Public School Ghaziabad, Ghaziabad

Class : Class 10

Solution assumes that the reflected ray by the second mirror will retrace it's path and the angle of incidence on the second mirror is 90 degrees. Question is how

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Snigdha swaminath from Christ nagar higher secondary school , Trivandrum

Subject :NSO Class : Class 9

Study the given figure carefully. In which direction the net movement of water will take place?

A From solution 1 to solution 2
B From solution 2 to solution 1
C Both (A) or (B)
D No movement will take place

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Ans 1:

Gokul Warrier M from SRI KUMARANS MALLASANDRA, BANGALORE

Class : Class 9

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Parth Pandey from G.D.Goenka Public School , Lucknow

Subject :NSO Class : Class 7

Study the given flowchart carefully.

P, Q, R and S are respectively

ASalt, sawdust, iron dust, camphor
BSawdust, iron dust, camphor, salt
CIron dust, camphor, sawdust, salt
DCamphor, iron dust, sawdust, salt.

how? pls someone tell as salt and camphor both are non magnetic

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from ,

Subject :NSO Class : Class 8

Bees which are not carrying honey fly with a flapping frequency of 440 Hz while those which are carrying honey fly with a flapping frequency of 300 Hz. The sound made by bees which are not carrying honey has

AA lower pitch
BA higher pitch
CA smaller loudness
DA greater loudness

How it's higher pitch? Please give of this question.