National Science Olympiad Forum By SOF Olympiad Trainer - Page 609

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B Ananda Sri Kaushal from Sentia, Hyderabad

Subject :NSO Class : Class 9

Which of the following curves would be obtained on heating solid naphthalene to a temperature which is above its melting point?

A
B
C
D

good question

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Ans 1:

Sampada from Hansraj model school, New Delhi

Class : Class 9

The correct answer is A

Ans 2:

SHREYANKA from USHA MARTIN SCHOOL, MALDA

Class : Class 9

Ans 3:

Raghav Tyagi from birla vidya niketan, new delhi

Class : Class 10

the answer should be A. its given wrong in the test

Ans 4:

Tanmay Mehta from Nirmala Convent high school, Renukoot

Class : Class 9

the correct answer is A it is given wrong in the test

Ans 5:

Hammaad from Vels vidyasharam, KUNDRATHUR KANCHEEPURAM

Class : Class 5

The answer is B because initial temp is 0 the its heated to temp more than melting point so after melting it'll have latent heat of fusion ,therefore temp will be constant finally it will spike to a high temp shown by graph b

Ans 6:

Bipasana from KV IIT Kanpur, Kanpur

Class : Class 9

Can someone explain the solution?

Ans 7:

TigerSounak from Kv cossipore, Kolkata

Class : Class 8

The answer is B

Ans 8:

Meet vasani from HMP highschool, Dahanu

Class : Class 9

Ans 9:

Akshara from NPS, Bengaluru

Class : Class 8

Answer is A

Ans 10:

timaan from sanskriti, delhi

Class : Class 7

The answer is A

Ans 11:

Sohini Mondal from Apeejay School Noida , NOIDA

Class : Class 9

Why is the solution B? Can someone explain

Ans 12:

SONAL MUKUND SHINDE from PODAR INTERNATIONAL SCHOOL SANGLI, TASGAON

Class : Class 10

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Shreya Mahesh from Sri Sri Ravishankar Vidya Mandir, Bangalore

Subject :NSO Class : Class 8

In the given figure, showing the ultrastructure of a plant cell, identify the parts marked as P and Q and select the correct option regarding these.

(i) Part P helps in osmoregulation.
(ii) Cellular respiration occurs in part Q.
(iii) Synthesis of sugars occurs in part Q.
(iv) Part P provides colour to flowers and fruits.

A (i) and (ii) only
B (i) and (iii) only
C (iii) and (iv) only
D (ii) and (iv) only

The figure is not clear for the students to identify the organelle

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Ans 1:

SAIRAM from TRIVENI TALENT SCHOOL, HYDERBAD

Class : Class 10

Ans 2:

arnav raj sharma from gulibulium school, new york

Class : Class 8

p is a vacuole so it is used to store food

Ans 3:

Adhrit from CHSV, Chennai

Class : Class 8

how the heck am i supposed to tell what q is, the figure is so blurry

Ans 4:

Arnav Gangwar from DPS NOIDA, GAUTAM BUDH NAGAR

Class : Class 8

true

Ans 5:

Anirudh from Kendriya Vidyalaya Kanjikode, Palakkad

Class : Class 8

its 'B'- Part P helps in osmoregulation and Synthesis of sugars occurs in part Q

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Akshara from NPS, Bengaluru

Subject :NSO Class : Class 5

Seeds which have wings and tufts of hair on them are dispersed by ____.
(a) Explosion
(b) Air
(c) Water
(d) Animals

correct

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Ans 1:

Adhyoth Srinivas from Delhi public school north , Bangalore

Class : Class 6

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Akshara from NPS, Bengaluru

Subject :NSO Class : Class 5

Ragini is prone to mild infections and is frequently falling ill. Doctor says that her immunity has decreased due to nutrient deficiency and advices her to take citrus fruits like tomatoes, lemons, oranges in her diet. Which of the following can be the deficient nutrient?
(a) Vitamin C
(b) Vitamin K
(c) Vitamin D
(d) Vitamin E

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Ans 1:

Adhyoth Srinivas from Delhi public school north , Bangalore

Class : Class 6

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Vibhor Mudgal from GBN School, Faridabad

Subject :NSO Class : Class 4

Sarika read that woodlice are usually found under piles of damp rotting leaves. She suggested four possible explanations for this behaviour.
1. Woodlice need rotting leaves.
2. Woodlice find their food there.
3. Woodlice need dark conditions.
4. Woodlice need a damp environment.

The above diagram shows the experiment which Sarika had conducted. Which above explanation regarding the behaviour of the woodlice was tested by Sarika?

A 1
B 2
C 3
D 4

Ans.4

View All Answers (15)

Ans 1:

Sashriti Das from Delhi Public School Bangalore North, Bangalore

Class : Class 5

tough

Ans 2:

Aarathy Sudhir Aarav Sudhir from Global Indian International School, Abu Dhabi

Class : Class 7

It is easy, read the solution propperly and then you find the answer

Ans 3:

Aarathy Sudhir Aarav Sudhir from Global Indian International School, Abu Dhabi

Class : Class 7

The Solution is not explaining in a way through which we can undestaand

Ans 4:

Ankush Dey from Sri Chaitanya Techno School Newtown, Kolkata

Class : Class 6

Ans 5:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida

Class : Class 7

I don't get it.I wish that the person who's answer is always labelled as Master Answer,Admin from reviwise comes and answers this question.

Ans 6:

Arnesh from DPS Mathura Road , New Delhi

Class : Class 7

I also didn't understand the question.

Ans 7:

Aryan Bomanwar from Chirec international School, HYDERABAD

Class : Class 6

Ans 8:

Ishaan Singh from BBPS, Gurugram

Class : Class 9

Ans 9:

Vibhor Mudgal from GBN School, Faridabad

Class : Class 4

Ans 10:

Niharikaa Pande from BILLABONG HIGH INTERNATIONAL SCHOOL MALAD, Mumbai

Class : Class 6

Why is the answer D? This is because it says that woodlice are found typically under damp rotting leaves. For the test, Sanika kept rotting leaves on dry and damp soil. If you read the question carefully, you will find that Sanika had stated that woodlice needed a damp environment as a possible explanation as to why woodlice were found under damp rotting leaves. She even placed the woodlice pointing to the rotting leaves with damp soil under it. Based on this, she was most probably testing the 4th explanation she stated and so that, my friends, is why option D is the correct answer.