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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 6

Ans 2: (Master Answer)

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

Ans 3:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

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

Ans 1:

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

Ans 2:

B.S SWAYAM SIDHEE from MODERN PUBLIC SCHOOL, BALASORE
Class : Class 9
C

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

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
Opt. B is incorrect as the stigmas in wind pollinated flowers is dull colored.

Ans 2:

Navya GUPTA from dps noida, Noida
Class : Class 3
Flowers should always be bright coloured to attract insects

Ans 3:

Jasmit kaur from Sun Valley International School, Vashundra
Class : Class 7

Ans 4:

UMA Subramanian from Global Indian International School, Singapore
Class : Class 7

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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:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
answer should be y.

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:

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.

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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:

Krishiv Gupta from Sat Paul Mittal School, Ludhiana
Class : Class 6
c = correct

Ans 2:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
The answer is opt. c

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

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

Ans 1:

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

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

Ans 1:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8
good too good

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

Ans 1:

Mohi from Vibgyor, Bangalore
Class : Class 6
C and D as they are from cat family

Ans 2:

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

Ans 3:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8
sanju very perfect

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yuvraj from Bhakti Vedanta Swami mission school, Mumbai
Subject :NSO    Class : Class 8

Which of the following statements are correct about planet Venus?
(i) It rotates from west to east while the Earth rotates from east to west.
(ii) It shows phases just like the Moon.
(iii) It appears in the eastern sky before sunrise and in the western sky just after sunset.
(iv) It has no satellite of its own.
(v) It is the second brightest star in the night sky.

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


Ans 1: (Master Answer)

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

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