CBSE > Class 10 > Science | CBSE Board | Homework Help

The accumulation and progressive increase in the concentration of non biodegradable, harmful chemicals at different tropic levels in a food chain is called biological magnification.

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ANSWER

give three reaction of decomposition reaction in which heat, light and electricity is applied

Posted by Soumik Sarkar 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Aadya Singh 5 years, 10 months ago

Yes I'm sure..It's right ☺

2Thank You

Soumik Sarkar 5 years, 10 months ago

Shruti thanks bt r u sure the eqn that u have given in the electricity... ONCE AGAIN THANKS...??

2Thank You

Aadya Singh 5 years, 10 months ago

Heat - CaCO3 ----> CaO + CO2..
Light - 2AgCl----> 2Ag + Cl2
Electricity - 2H2O ---> 2H2 + O2 ..

4Thank You

ANSWER

What is noun

Posted by Sidhnath Sharma 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Sumitcool Coolsharma 5 years, 10 months ago

Noun is a thing, place, or persons name

0Thank You

Aadya Singh 5 years, 10 months ago

Noun is a naming word ??

1Thank You

ANSWER

Why should curd and sour substance not be kept in bross and coper vassels?

Posted by Jimin Jimin 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Grahul 📒🎒📓📔🙇🙇🙇 Rahul 5 years, 10 months ago

Curd and other sour substances contain acids which can react with the metals of brass and copper vessels to form toxic metal compounds which can cause food poisoning and damage our health

2Thank You

Pooja Choudhary 5 years, 10 months ago

These substances get OXIDIZED with other metals

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Aadya Singh 5 years, 10 months ago

Because it produces toxic chemicals when kept in brass and copper vessels which is harmful for human beings..

4Thank You

ANSWER

A glass slab made of a material of refractive index n1 is kept in a medium of refractive index n2. A light ray incident on the slab .Draw the path of the rays of light emerging from the slab if n1<n2

Posted by Goutham A 5 years, 10 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is anta acid

Posted by Shivam Patel 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

Acidity*

2Thank You

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

The basic substance which nullifies the effect of acid to eliminate wcudity

2Thank You

ANSWER

An element X has mass number 40 and contains 21 neutrons in its atom . To which group of periodic table does it belong ? The element X forms a compound X2Y. suggest an element Y might be and give reason for your choice

Posted by Goutham A 5 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Amar Kumar Sharma 5 years, 10 months ago

Group1,oxygen

1Thank You

Aadya Singh 5 years, 10 months ago

Group - 1 and period - 4 ?

1Thank You

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

4 period 2 group

0Thank You

Sumit Kumar 5 years, 10 months ago

Ni मालूम

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ANSWER

The coil of a heater is cut into two equal halves and only one is used in the heater .The ratio of the heat produces by the this half of the coil to that produced by the original coil is ?

Posted by Goutham A 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

1:2

0Thank You

ANSWER

Do the women fell pain when p*nis enters their v*gina?

Posted by Saksham Khanna 5 years, 10 months ago

CBSE > Class 10 > Science

5 answers

Saksham Khanna 5 years, 10 months ago

Only she will tell who has experienced....

0Thank You

Raja_Aniket_ Namdev? 5 years, 10 months ago

kya yr had h...mtlb kuchh bhi..

0Thank You

Aman Bhai Patel 5 years, 10 months ago

Very nice question i thing this may come in the examination

0Thank You

Shruti Gupta 5 years, 10 months ago

Its not in portion, you dont need to worry knowing about it ?

2Thank You

Isha Tyagi 5 years, 10 months ago

You asked a silly question

0Thank You

ANSWER

What type of source of energy is mentioned in the above picture

Posted by Rajendra Bhura 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Shruti Gupta 5 years, 10 months ago

Which picture?

0Thank You

ANSWER

Suggest two precautions to be taken by the person suffering from diabetes.

Posted by Shruti Gupta 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Yuvraj ? 5 years, 10 months ago

Avoid sugar and sweet items. Drink water as much as you can.

2Thank You

ANSWER

What happens when we keep washing soda in dry air

Posted by Shivam Sanket 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Shruti Gupta 5 years, 10 months ago

If you just keep it untouched outside, the water of crystallization will get evaporated overtime but very slowly. This will result in formation of soda ash or sodium carbonate.

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ANSWER

State dobereiner law of traid

Posted by Amit Kotari 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Simranpreet Kaur 5 years, 10 months ago

Doberneir Law of traids stated that according to his triads the half of the sum of the mass of the 1st and 3rd element is partially equal to the mass of 2nd element

1Thank You

Jyoti Bharti 5 years, 10 months ago

1st and 3rd element hoga

2Thank You

Jyoti Bharti 5 years, 10 months ago

Dobereiner grouped 3 elements of same properties together. This bis called Dobereiner triads. One of the remarkable properties of Dobereiner triads is that when elements are arranged in order of their increasing atomic masses then the average mass of central element is roughly is equal to sum of the average mass of 1st and 2nd element

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ANSWER

Wht does not silver evolve hydrogen on reacting with H2SO4

Posted by Rosy Rosy 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Jyoti Bharti 5 years, 10 months ago

Because silver is least reactive matal than hydrogen so it can't replace Hydrogen from H2SO4

0Thank You

Shruti Gupta 5 years, 10 months ago

Silver is a very low reactive metal and doesn't react with H2SO4 and hence no gas is evolved.

0Thank You

ANSWER

Why photosynthesis is endothermic reaction?

Posted by Aayushi Desai 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Arisha Zaidi 5 years, 10 months ago

Because during photosynthesis energy is absorbed by the plants

0Thank You

Prachi Singh 5 years, 10 months ago

Because light energy is absorbed by plants

1Thank You

Diksha ? 5 years, 10 months ago

Because light energy is absorbed..

2Thank You

ANSWER

what are the fossils fuel

Posted by Pardeep Singj 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Aadya Singh 5 years, 10 months ago

Fossil fuels are formed by decomposition of dead plants and animals buried deep under the earth..

3Thank You

ANSWER

Sky sunset ke time red kyu ho jata hain

Posted by Kasim Kasim Khan 5 years, 10 months ago

CBSE > Class 10 > Science

4 answers

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

To explain this phenomenon , activity is also given in ncert book in which blue light is scattered and the red reaches the point

0Thank You

Sakshi Banitia 5 years, 10 months ago

During sunset , sky appears red due to atmospheric refraction beacause wavelength of red is maximum so it scatters the least

3Thank You

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

Because other lights are scattered and red is not because red has largest wavelength

0Thank You

Shruti Gupta 5 years, 10 months ago

Scattering if light ki wajah se. Red ki wavelength sabse lambi hoti hai toh woh zyaada door tak dikhayi deta hai isliye sunset and sunrise ke time reddish sa lagta hai sky

2Thank You

ANSWER

A ray ACB incident on a spherical mirror whose centre of curvature is C. In which direction will it reflect?

Posted by Saurabh Kumar 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Bini Hota 4 years, 6 months ago

Ye kaisa hai pura explain khan kare ho tum nonsence

0Thank You

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

It will deflect in the same path as the incidence

1Thank You

ANSWER

If neutron star dies then what kind of sub atomic particle will form??

Posted by Rohan Stark 5 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Shruti Gupta 5 years, 10 months ago

Oh wow thanks! Might be helpful for boards. Was it a HOTS question though?

0Thank You

Rohan Stark 5 years, 10 months ago

But the answer is Stranglets.

1Thank You

Rohan Stark 5 years, 10 months ago

You are right

1Thank You

Shruti Gupta 5 years, 10 months ago

Where'd you get that question from? Which chapter? I don't think its something fron our 10th syllabus

1Thank You

ANSWER

If anyone is feeling stressed or a little depressed or if anyone's mood is off......then??????

Posted by Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

CBSE > Class 10 > Science

24 answers

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Aati h to hm kya kre.....

0Thank You

???Akhil Singh Sengar ??? 5 years, 10 months ago

Mujhe aati hai

0Thank You

???Akhil Singh Sengar ??? 5 years, 10 months ago

All of you only no ‘Bakchodi’... ?Warna tum sabse zyada Bakchodi aur gaali mukhe aati ha?i ????

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Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Hey buddy m nt misusing d app......i have jst prescribed a medicine to my friends. ?

1Thank You

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

Stop misusing this app

3Thank You

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

2Thank You

⚜??Brainly Buddy??⚜ 5 years, 10 months ago

1Thank You

Yuvraj ? 5 years, 10 months ago

Hlo..mere jate hi sb gye kya..

1Thank You

Sowndaryaa Lakshmi V 5 years, 10 months ago

Heloooooooooooi

1Thank You

Yuvraj ? 5 years, 10 months ago

Jaan gya mai..?aata hu baad me bye..bro..isse puchke batana kyu mood off h

1Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Areh Shreya chli gyi kya

2Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Wo tum aadya se puchna.....

1Thank You

Yuvraj ? 5 years, 10 months ago

Naam batao..??..shreya h na..!!?

1Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Koi ni.....meri ek friend h????

2Thank You

Yuvraj ? 5 years, 10 months ago

Babu kon h bhai

1Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Ok babu???????????

2Thank You

Yuvraj ? 5 years, 10 months ago

Ohh..dekhegi...!!?

0Thank You

Shreya ... 5 years, 10 months ago

Sit alone and talk to yourself about your problem.

2Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Wo dekh hi legi?

2Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Ooo sahi m ....

1Thank You

Yuvraj ? 5 years, 10 months ago

Waah..shreya ko bta de ye..??

1Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Mja aa jayega.....pr haan pura sunna ??

1Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 10 months ago

Listen the song....TERA GHATA in Rajasthani version????

3Thank You

Yuvraj ? 5 years, 10 months ago

Yes..solution batao..??

1Thank You

ANSWER

Ethanol reacts with sodium and forms teo products .these are : 1)sodium ethanoate and hydrogen 2)sodiumethanoate and oxygen 3)sodium ethoxide and hydogen 4)sodium ethoxideand oygen Whats is the answer?

Posted by Ricky ? 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Jyoti Bharti 5 years, 10 months ago

Option 3

0Thank You

Shreya ... 5 years, 10 months ago

Sodium ethoxide and hydrogen.

3Thank You

ANSWER

At what rate the event should be projected to have the clear image?

Posted by Sanket Arjun 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Shreya ... 5 years, 10 months ago

24 frame rate per second (Fps).

4Thank You

ANSWER

Name some sources of DC?

Posted by Sanket Arjun 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Shreya ... 5 years, 10 months ago

Solar cells, batteries.

4Thank You

ANSWER

What do u mean by speciation?

Posted by Sanket Arjun 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Sakshi Banitia 5 years, 10 months ago

Speciation is the formation of new organism from pre existing ones.

0Thank You

Har Har Mahadev 🙏 5 years, 10 months ago

Geration of new species from existing one.

0Thank You

Shreya ... 5 years, 10 months ago

The development of 2 or more species from an existing one is known as speciation.

5Thank You

ANSWER

What is the substance that is present in cats that gives them flexibility

Posted by Ratna Prava Panda 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Riya Prajapati 5 years, 10 months ago

Flexible spine give them flexibility which is present between each individual bone in the vertebrae.Hope it help you?

1Thank You

ANSWER

Identify the acid and base for Ammonium Chloride salt, what would be the nature of the salt?

Posted by Kshma Manu 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Aadya Singh 5 years, 10 months ago

Acid - HCl and Base - Ammonium hydroxide..The nature of salt is acidic..

1Thank You

Sanket Arjun 5 years, 10 months ago

Nature of salt=mildy acidic

1Thank You

ANSWER

Advantage of spore formation

Posted by Brijpal Rana 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Shruti Gupta 5 years, 10 months ago

Plants that reproduce through spores have higher resisitance to heat, wind and adverse weather conditions. This is due to the hard covering on sporangia which protects the plant.

0Thank You

ANSWER

Make list of magnetic field lines

Posted by Shruti Gupta 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Magnetic field is a quantity that has both direction and magnitude. The direction of the magnetic field is taken to be the direction in which a north pole of the compass needle moves inside it. Therefore it is taken

by convention that the field lines emerge from north pole and merge at the south pole. Inside the magnet, the direction of field lines is from its south pole to its north pole. Thus the magnetic field lines are closed curves.

Properties of Magnetic Field Lines:

1. A magnetic field line is directed from the North Pole to the South Pole outside the magnet.
2. A magnetic field line is a closed and continuous curve.
3. The magnetic field lines are closer where the magnetic field is strong and farther apart where the magnetic field is weak.
4. The magnetic field lines never intersect each other.
5. Parallel and equidistant field lines represent a uniform magnetic field.