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

The tissue is plecenta. It's main function is to provide nutrition from mother body to foetus and exchange of waste products can also take place through placenta

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Mansi Bishnoi 4 years, 10 months ago

Placenta and its function is to provide nutrients to the developing child and to take out the waste produced by the developing child

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Ishika Choudhary 4 years, 10 months ago

placenta

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Assertion and reason questions and answers all 2021

Posted by Lokireddy Anjaneyareddy 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Dipak Gupta 4 years, 10 months ago

What is the question

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Manisha Gurjar 4 years, 10 months ago

Science chapter 1 question 5

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Ayush Raj 4 years, 10 months ago

......

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Solution of sample paper of science CBSE std X

Posted by Sumedha Habbu Kulkarni 4 years, 10 months ago

CBSE > Class 10 > Science

0 answers

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Describe the digestion of carbohydrates, proteins and fats in small intestine.

Posted by Divyansh Bibhor 4 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Priya Tomar 4 years, 10 months ago

Protein digestion occurs in the stomach and the duodenum through the action of three main enzymes: pepsin, secreted by the stomach, and trypsin and chymotrypsin, secreted by the pancreas. During carbohydrate digestion the bonds between glucose molecules are broken by salivary and pancreatic amylase.

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Hd Motivation - Arijit Bhattacharjee 4 years, 10 months ago

What is El

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CBSE pre Board sample paper

Posted by Praveen Kumar 4 years, 10 months ago

CBSE > Class 10 > Science

0 answers

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Limitations of dobreinner traids

Posted by Lokireddy Anjaneyareddy 4 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Aryan Pathak 4 years, 10 months ago

It could identify only 3 triads from the elements which were known at that time.also the atomic mass of the middlemost element is not exactly equal to the average atomic mass of the other 2 elements.Also some elements have their different chemical properties. So he didn't place them in correct order.

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Write the common name of CaSo4. 2h2o

Posted by Baby Kumari 4 years, 10 months ago

CBSE > Class 10 > Science

5 answers

Shivam Singh Patel 4 years, 10 months ago

Calcium sulphate dihydrate

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Shivam Singh Patel 4 years, 10 months ago

Calcium sulphatehydrooxide

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Baiju Bavara 4 years, 10 months ago

Gypsum

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Kiran Kumari 4 years, 10 months ago

Gypsum

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Sahil Singh 4 years, 10 months ago

gypsum

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Why damage of the ozone layer a Cause for concern

Posted by Madan Manoj Gowda 4 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Aayush Sharma 4 years, 10 months ago

Because of UV Ray's can reach to us that cause skin cancer

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Nakshatra Deora 4 years, 10 months ago

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Mohammed Tabrej Khan 4 years, 10 months ago

Damage to ozone layer is a cause of great concern because it's a layer which stops UV rays to enter the earth, causing skin cancer in humans and also damaging other things

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Thulasi Ram 4 years, 10 months ago

Rut 12

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pH ranges of strong, weak acid and strong, weak bases

Posted by Mahak Sadhya 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Prachi Ballewar 4 years, 10 months ago

pH range of strong acid is 0 and weak acid is 5 or 6. pH range of strong base is 14 and weak base is 8 or 9.

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Gautam Kumar Kumar 4 years, 10 months ago

Strong=0 to 1

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Khushi 4 years, 10 months ago

pH range of strong acid is 0 to 1, weak acid is 5 to just below 7 and strong base is 12 to 14 and weak base is 7 to 12

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Write down the observation in the form of chemical equations which shows that chemical reaction is going on or taking place

Posted by Srishti Shrivastava 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Prachi Ballewar 4 years, 10 months ago

By change in colour, change in state, change in temperature, formation of a precipitate and evolution of gas.

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Abc .. 4 years, 10 months ago

Change of state

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Kiran Kumari 4 years, 10 months ago

Change in temperature Evolution of gases

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Different b/w concave and convex mirrors

Posted by Sachin Chandhu 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Prachi Ballewar 4 years, 10 months ago

Concave mirror: the spherical mirror with inward curved reflecting surface is called concave mirror. A beam of light generally converges after reflection from such surfaces, it is also called convergent mirror. Convex mirror: the spherical mirror with outward curved reflecting surface is called convex mirror. A beam of light generally diverges after reflection from this surface, it is also called divergent mirror.

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Ishika Kumari 4 years, 10 months ago

Convex mirror : 1. Reflecting surfaces is in the outer part of the sphere. 2. Image is virtual and erect. 3. Magnification is always less than 1 .

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Ishika Kumari 4 years, 10 months ago

Concave mirror : 1. Reflecting surface is in the inner part of the mirror . 2. Image can be a real and inverted or virtual and erect . 3. Magnification can be either greater,equal or less than 1 .

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PDF of All Practical Files. Plzz

Posted by Aman Kumar 4 years, 10 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

How does non metallic character vary in a group (answer like 5 marks questions)

Posted by Pravat Rout 4 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Gourangi Dhingra 4 years, 10 months ago

In the periodic table ,As we go from left to right the metallic character decreases and the non metallic character increases......Furthermore, the tendency of an element to gain electrons increases with increases in effective nuclear charge , so non metallic character increases from moving left to right in a period. Hope it helps you!!

2Thank You

Sounak Chatterjee 4 years, 10 months ago

In a group if non metallic character decrease as we go from top to bottom. This happens because the distance between the valence shell and the nucleas increases as we go down a group. Therefore electrons can be given out easily as we go down a group and metallic character increases and non metallic character decreases.

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Noor Lail 4 years, 10 months ago

In groups (from top to bottom)non metallic character decreases

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Ashish Gujjar 4 years, 10 months ago

Etuif do it good to ek to if do it do if do hi g di hug day so which k is to pick do hi i sub on kuch khas topic so do do o tab pc tak provide risk Rico rajvi din of she ji uh i ix sub fig ho if aaj ch it xxiv ch i if was su ok kb c is click ko GCB job

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describe the structure of soap molecule with the help of diagram

Posted by Pravat Rout 4 years, 10 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Which is used in welding of electric wires ?

Posted by Ishika Kumari 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Ishika Kumari 4 years, 10 months ago

Thanks

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Noor Lail 4 years, 10 months ago

Solder Alloy is used in welding of electric wires .it contain 50%lead and 50%tin

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Navjeet Kaur Brar 4 years, 10 months ago

Solder.

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ANSWER

why and how does water enter continuously into the root of xylem?

Posted by シ︎?_?_?_?_? シ︎ 4 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Aryan Pathak 4 years, 10 months ago

Root hair have thin walls. Due to this, water enters the root hair because of osmosis. Water from root hair continuously moves into the root xylem. To maintain the osmotic gradient, the cells of root hair actively take up ions from the soil.

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Sounak Chatterjee 4 years, 10 months ago

The roots of plants contain tiny hair called root hair. Water and minerals are absorbed by root hair through the process of diffusion. Then the water absorbed by the root hair from the soil pass from cell to cell by osmosis through the epidermis, root cortex, endodermis and reach the root xlem.

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Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?

Posted by シ︎?_?_?_?_? シ︎ 4 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Daniyal Khan 4 years, 10 months ago

because they have to take in oxygen that is dissolved in water which is comparatively less than on the surface. so they breath faster to take more oxygen in.

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ANSWER

A concave mirror has a radius of curvature of 0.4 m. Find the position and size of the image of an object 0.2 m high placed 0.8 m in front of the mirror.

Posted by Saniya Saba 4 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Kriti Singh 4 years, 10 months ago

Given, R=0.4m F=r/2=0.4/2=-0.2m U=-0.8m H=0.2m Now,by mirror formula 1/f=1/v+1/u=1/v=1/f-1/u 1/0.2-1/0.8=-2.6m M=-(v/u)=-(-2.6/-0.8)=-3.25m M=h'/h=h'=h*m=-3.25*0.2=0.65m Hence the distance of image from the mirror is -3.26m and the height of the image is 0.65m

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What happens to the image distance in the normal human eye when we decrease the distance of an object, say 10 m to 1 m? Justify your answer.

Posted by ???❣️❣️??Aman Kumar????????? 4 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Mahak Sadhya 4 years, 10 months ago

Ye toh syllabus me nhi hai

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Kriti Singh 4 years, 10 months ago

The image formation in normal human eye is fixed om retina if we decrease the object distance then if the image is formed on retina then we are able to see object but if image is not formed on retina the we are not able to see the object...

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How long are various non biodegradable substances expected to last in our environment

Posted by Nagireddy Pavan 4 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Manpreet Kaur 4 years, 10 months ago

300 years . Some non biodegrables may take more than this.

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In a food chain, if 10,000 joules of energy is available to the producer, how much energy will be available to the secondary consumer to transfer it to the tertiary consumer?

Posted by A. Kumaaran 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Sagar Banawal 4 years, 10 months ago

100

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Prithviraj Godara 4 years, 10 months ago

SOLVE THIS QUESTION ACCORDING TO THE 10 PARCENT LAW.

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Khushi 4 years, 10 months ago

10 joules of energy will be available to the secondary consumer to transfer it to the tertiary consumer

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Full video explanation for carbon

Posted by Mahak Sadhya 4 years, 10 months ago

CBSE > Class 10 > Science

1 answers

シ︎?_?_?_?_? シ︎ 4 years, 10 months ago

How

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What is the name of buffelow in science

Posted by Shashi Lather 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Aryan Pathak 4 years, 10 months ago

Bubalus or Bubalina

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Priya Tomar 4 years, 10 months ago

Bison bison

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Umar Farook 4 years, 10 months ago

American airlines have spines and the cockroaches are not here for the sake and the world will see you have the right kind of cloud and a dndro in hindi is the most common type in hindi

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What happens to extra glucose or carbohydrates in an animal

Posted by Rolly Paul 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Aryan Pathak 4 years, 10 months ago

In an animal body, extra glucose or carbohydrate is stored in the liver as well as in skeletal muscles in the form of glycogen. Glucose is converted to glycogen in liver. When the body is in need of energy, glycogen is converted back into glucose.

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Faiza Irshad 4 years, 10 months ago

Excess carbohydrates are stored as starch in plant and as glycogen in animals

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Arif Ansari 4 years, 10 months ago

Starch

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ANSWER

Define single,double,triple bond & examples of each bond?

Posted by Naina Choudhary. 4 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Pravat Rout 4 years, 10 months ago

Single bond - a chemical bond in which one pair of electron is shared between two atom example Cl2, HCl Double bond -a chemical bond in which two pair of electron shared between two atom example O2,CO2 Triple bond - a chemical bond in which three pairs of electron shared between two atom example N2,C2H2

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Define ionic bond?

Posted by Naina Choudhary. 4 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Mehak Bajaj 4 years, 10 months ago

Ionic bond is a bond formed by the complete transfer of electrons.

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Sneha Kumari 4 years, 10 months ago

In ionic bond two elements are required one is metal and second is non metal. It takes place by tranfer off electron in which metal loses and non metal gains to full fill it's nearest inert gases. Example :- MgCl2

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Sagar Banawal 4 years, 10 months ago

Ionic bond is a when a element transfar of electron to complete inner configuration Doneter. Is kown as Anion and ganer known as cation

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Khushi 4 years, 10 months ago

The electrostatic force of attraction which holds the two oppositely charged ions together is called the ionic bond.

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What do you mean by villi

Posted by Karan Singh 4 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Sagar Banawal 4 years, 10 months ago

Projection like fingar in small intestine known as villi use for absorption of sugar, amino acid ,fatti acid and it connect with blood vessels to transfer food form villy to cells

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Harshwinder Singh 4 years, 10 months ago

Inner lining of small intestine that increases surface area for absorption

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Navneet Kumar 4 years, 10 months ago

In the inner lining of the small intestine which has numerous finger like projections which increases the surface area for absorption.

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