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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

Ans 1:

Arnav Bhatnagar from RFS, Navi Mumbai
Class : Class 8

Ans 2:

Ankur Kumar from Delhi Public School, Ranchi
Class : Class 9
Volume of the solid cube =(25*25*25)/1000000 cubic metre. Mass of the solid cube = the mass of the body which can be placed on it to completely submerge it Density = 0.1kg/ 125*(10)^6=800kg/m^3

Ans 3:

Ankur Kumar from Delhi Public School, Ranchi
Class : Class 9
Volume of the solid cube =(25*25*25)/1000000 cubic metre. Mass of the solid cube = the mass of the body which can be placed on it to completely submerge it Density = 0.1kg/ 125*(10)^6=800kg/m^3

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

Study the given figure carefully and select the incorrect statement(s).

I. A white ring is formed which is closer to the hydrochloric acid end of the tube because hydrogen chloride fumes diffuse faster than ammonia.
II. Ratio of number of atoms of ammonia to that of hydrogen chloride which combine to form 3.6138 × 1024 atoms of ammonium chloride is 1 : 3.
III. 3.4 g of ammonia combines with 7.3 g of hydrogen chloride to form 10.7 g of ammonium chloride.
IV. If temperature is increased, white ring will be formed exactly in the middle of the tube.
(Given : Atomic mass of H = 1 u, N = 14 u, Cl = 35.5 u)

A II and IV only
B II and III only
C I, II and IV only
D I only


How to solve this

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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Ajoy Bhuyan from DELHI PUBLIC SCHOOL, Bongaigaon
Subject :NSO    Class : Class 4

Ans 1:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6
Thus ans is c not BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 2:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6
THIS IS NOT POSSIBLE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Because you can GOOGLE IT.......................................... MY OPINION- Kushagra Chaturvedi

Ans 3:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6

Ans 4:

Ajoy Bhuyan from DELHI PUBLIC SCHOOL, Bongaigaon
Class : Class 4

Ans 5:

Ajoy Bhuyan from DELHI PUBLIC SCHOOL, Bongaigaon
Class : Class 4
b ans

Ans 6:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6
Thus ans is c not BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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ISHANI RAJE from NALANDA PUBLIC SCHOOL, Mumbai
Subject :NSO    Class : Class 7

Ans 1:

Nivedita Tadepalli from Birla Open Minds International School-Bandlaguda Jagir, Hyderabad
Class : Class 7
how is answer a? I don't understand

Ans 2:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8

Ans 3:

Nivedita Tadepalli from Birla Open Minds International School-Bandlaguda Jagir, Hyderabad
Class : Class 7

Ans 4:

Daksh Thakkar from VIBGYOR, Mumbai
Class : Class 8
ans is a

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medhamshu8 from sri chaitanya, hyderabad
Subject :NSO    Class : Class 7

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