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

User Forum

Ask Your Question
ADITHI M from NARAYANA E TECHNO SCHOOL, BANGALORE
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is B. The pattern is in increasing powers of 5.

Post Your Answer

SUBRATA MUKHERJEE from ,
Subject :NSO    Class : Class 8

Few statements are given below. Identify the incorrect statements and mark the appropriate option.
(i) In fractional distillation of petroleum, hydrocarbon with lowest boiling point condenses first.
(ii) Useful substances obtained from petroleum and natural gas are termed as ‘Petrochemicals’.
(iii) Coke is used in the extraction of many metals.
(iv) Paraffin wax used in candles, vaseline, grease, polish is obtained by destructive distillation of coal.

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


It should be d

Ans 1:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 8

Ans 2:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is B.

Post Your Answer

Shivansh Tiwari from Deens Academy , Bangalore
Subject :NSO    Class : Class 3

Ans 1:

BS SWAYAM SIDHEE from MODERN PUBLIC SCHOOL, BALASORE
Class : Class 5
C

Ans 2:

B Megashyam from Sri Chaitanya techno school, bengaluru
Class : Class 5
c

Post Your Answer

Khushie from Gdgps gurugram, Gurgaon
Subject :NSO    Class : Class 5

Ans 1:

ishi gupta from dps noida, Noida
Class : Class 5
Flowers should always be bright coloured to attract insects

Ans 2:

Jasmit kaur from Sun Valley International School, Vashundra
Class : Class 5

Ans 3:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 7
Opt. B is incorrect as the stigmas in wind pollinated flowers is dull colored.

Post Your Answer

Khushie from Gdgps gurugram, Gurgaon
Subject :NSO    Class : Class 5

Raman took four similar pots (with a hole at the base) each with equal amount of different type of soil. He then placed these four pots on four similar dishes and poured water slowly on each soil sample. He used a stopwatch to measure the time taken by water to reach the level, he had marked at the same height in each dish.

The results obtained by him were tabulated in the table shown here.
Which soil is the most suitable for a plant that thrives in sandy soil ?

AW
BX
CY
DZ


Ans 1:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar
Class : Class 4
Raman took four similar pots (with a hole at the base) each with equal amount of different type of soil. He then placed these four pots on four similar dishes and poured water slowly on each soil sample. He used a stopwatch to measure the time taken by water to reach the level he had marked at the same height in each dish. The results obtained by him were tabulated in the table shown . The soil whose particles are fine and are closely packed together will not have much space between the particles. So, water will pass slowly through such soil, and will take more time to reach the marked level. On the other hand, the soil whose particles are big and are loosely held together – like sandy soil - will have ample space between the particles. So, water will pass easily through such soil, and will take less time to reach the marked level. The table shows that the water has taken the least amount of time – 35 seconds – to pass through Soil Y and reach the marked level. That means Soil Y will be most suitable for the plant which thrives in sandy soil. Hence, the correct answer is Option C.

Ans 2:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
Answer should be (A) because the soil from which the water took 35 seconds to pass, must be gravel as we all have read that there are 4 types of soils 1)gravel 2)sandy soil 3)loamy soil and 4)clay. Sandy soil comes in 2nd place when you conduct an experiment about the abilities of the quantity of water the type of soil can absorb. so I say that the sandy soil should be the one that let the water pass through it in 48 seconds.

Ans 3:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 7
answer should be y.

Post Your Answer

Ojas Patil from Vikhe Patil Memorial School Pune, Pune
Subject :NSO    Class : Class 6

Amit, Rahul and Naveen were given three glass slides I, II and III respectively and a white paper with a cross mark (×). Amit painted his glass slide with a light blue colour. Rahul painted his glass slide with a black paint and Naveen left his slide as it is. They put each of these slides over the mark.


--------(p)---------------(q)-----------(r)
Atransparent---translucent---opaque
Btranslucent---transparent---opaque
Ctranslucent---opaque--------transparent
Dopaque-------translucent----transparent


c

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 7
The answer is opt. c

Post Your Answer

Ojas Patil from Vikhe Patil Memorial School Pune, Pune
Subject :NSO    Class : Class 6

Post Your Answer

Arrunabh from Delhi public school, Indore
Subject :NSO    Class : Class 3

Ans 1:

Bhanu V from World One , Hyderabad
Class : Class 4
C

Post Your Answer

sanjana from NARAYANA E TECHNO , Chennai
Subject :NSO    Class : Class 3

Ans 1:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 5
good too good

Post Your Answer

sanjana from NARAYANA E TECHNO , Chennai
Subject :NSO    Class : Class 3

Ans 1:

Mitul Tiwari from Lotus Valley International School, Noida
Class : Class 4
Cat and Tiger both are from Cat family

Ans 2:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 5
sanju very perfect

Ans 3:

Mohi from Vibgyor, Bangalore
Class : Class 1
C and D as they are from cat family

Post Your Answer