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How khadin system prevent mosqutioes breeding

Posted by Tanmay Mehta 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

The 'Khadin' system of rainwater harvesting was practiced in ancient times in Rajasthan. In this system, a very long (about 100 m - 300 m long) earthen embankment called 'Bund' is built across the lower hill slopes lying below gravelly uplands. The rainwater from the catchment area is made to flow down the slopes and stopped by the 'Bund' to form a reservoir. The rainwater collected in the reservoir formed by the 'Bund', and in the well, gradually penetrates into the land (or ground) so it does not allow mosquito breeding.

ANSWER

propene react with HBr to give isopropyle bromide

Posted by Ankit Sharma 5 years, 10 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Who introduced the term pH value

Posted by Ajay ???? 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Krish Chourasia 5 years, 10 months ago

Soren peder lauritz sorensen

Niraj Kumar 5 years, 10 months ago

Sorensen

ANSWER

Blueprint of science for 2020 board examinations

Posted by Yash Choubey 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Shruti Gupta 5 years, 10 months ago

You can find it on the cbse.nic.in website. The sample papers issued by CBSE are a blueprint for boards.

ANSWER

Compound of baking soda

Posted by Aman Chauhan 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Saksham Khanna 5 years, 10 months ago

NaHCo3

Abhijeet Yadav 5 years, 10 months ago

Baking powder-Baking soda +Tartaric acid(edible acid)

Sidharth Chauhan 5 years, 10 months ago

NaHCo3

ANSWER

Compound of baking soda

Posted by Aman Chauhan 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Saksham Khanna 5 years, 10 months ago

Puneet you are wrong.

Niraj Kumar 5 years, 10 months ago

NAHCO3

Puneet Singh 5 years, 10 months ago

Na2co3

ANSWER

Defferent between autotrophic and hetrotrpoic

Posted by Mohd Saad 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Autotrophic nutrition is that mode of nutrition in which an organism makes its own food from the simple inorganic materials like carbon dioxide and water present in the surroundings (with the help of sunlight energy).
Example: Green plants obtain food by autotrophic nutrition. However, heterotrophic nutrition is that mode of nutrition in which an organism cannot make its own food from simple inorganic materials like carbon dioxide and water, and depends on other organisms for its food.
Example: All animals obtain food by heterotrophic nutrition.

ANSWER

A red brown gas is released along with O2 and lead oxide on heating lead nitrate.it ia an example of

Posted by Arbaaz Uddin 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Arya Magade 5 years, 10 months ago

NO2 is the brown coloured gas.

Shruti Gupta 5 years, 10 months ago

The brown gas is nitrous dioxide (NO2). It is an example of decomposition reaction.

ANSWER

Function of diancephalon

Posted by Sangeeta Chaurasia 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

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

Hii Sangeeta How are you

Meghna Thapar 5 years, 10 months ago

The diencephalon relays sensory information between brain regions and controls many autonomic functions of the peripheral nervous system. This section of the forebrain also connects structures of the endocrine system with the nervous system and works with the limbic system to generate and manage emotions and memories.

ANSWER

Bio kaise pade

Posted by Saloni Kumari 5 years, 10 months ago

CBSE > Class 10 > Science

8 answers

Saksham Khanna 5 years, 10 months ago

Sirf chodo bio samajh aa jayegi.

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

???

Shruti Gupta 5 years, 10 months ago

Read each chapter in bio atkeast 2-3 times thoroughly. Sove NCERT questions. If you have time left, solve previous years papers, practice the diagrams. NCERT is more than enough to score well :) All the best!

Diksha ? 5 years, 10 months ago

Ncert read kro ache se,easy h

Diksha ? 5 years, 10 months ago

Dr???

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

Bio....padho dil se❤❤

Pk . 5 years, 10 months ago

Bio alag thodi na hai.....jaise air sab subject padhti ho waise padho.....ignore mat karo bio ko.

Utkarsh Singh 5 years, 10 months ago

Ncert one an only.......

ANSWER

why do sky appear bluedyring day

Posted by Sudhir Kumar 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Utkarsh Singh 5 years, 10 months ago

Due to phenomenon of scattering of light...when sun is in day the most scatter color in vibgyor... Is blue... It can also be said atmospheric refraction....

Sumit Panwar 5 years, 10 months ago

Due to the phenomenon ofscattering of the light.

ANSWER

Why sky appears white at noon? Note that i asked "sky" not "sun"?

Posted by Cheeku 18 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Utkarsh Singh 5 years, 10 months ago

Sky appears white at noon because at the time of noon no scattering of light take's place....via vibgyor...

Sumit Panwar 5 years, 10 months ago

Due to scattering of the sunlight

ANSWER

How is the process of pollination different from fertilization?

Posted by Nitesh Verma 5 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Saksham Khanna 5 years, 10 months ago

Aadya badi padhai karti ho

Prachi Singh 5 years, 10 months ago

The fusion of male and female gamate to form a new offspring is called fertilisation. But ,the transfer of pollen from the anther of stamen to the stigma of carpel is called pollination.

Aadya Singh 5 years, 10 months ago

The fusion of male and female gamate to form a new cell is called fertilization..

Aadya Singh 5 years, 10 months ago

The transfer of pollen from the anther of the stamen to the stigma of carpel is called pollination...

ANSWER

Name the type of mirrors used in the design of solar furnaces. Explain how high temperature is achieved by this device.

Posted by Rathindhar M 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Arya Magade 5 years, 10 months ago

Concave mirrors are used in solar furnaces. This is because they have a converging power. With this they have the ability to focus the rays of the sun to the substance. Hence high temperature is observed.

Aditi Goel 5 years, 10 months ago

Concave mirrors are used in solar devices since they are converging in nature and when the sunlight falls on mirror it get converged at a point thus high temperature is obtained.

ANSWER

Explain how the translocation of materials in phloem tissue in plants is achieved by utilising energy ????

Posted by Jhalak Saluja 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Sumit Panwar 5 years, 10 months ago

Phloem is a type of living vascular tissue found in plants.

Sumit Panwar 5 years, 10 months ago

Phloem have living contain seive tubes and companion cells helps in transfer of organic matter (food made during photosynthesis) from leaves to all other plant parts, both horizontally and vertically. Stems of some plants also perform photosynthesis.

ANSWER

What is blue litmas paper ?explain with example

Posted by Paramjeet Pal 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Prachi Singh 5 years, 10 months ago

The paper which use to check the substance whether acid, base or nutral

Aadya Singh 5 years, 10 months ago

Acid turns blue limtus to red...and the base has no effect on it..

Aadya Singh 5 years, 10 months ago

It is an Indidicator which is used to check whether the substance is acid, base or neutral..

ANSWER

How is sperm go into female body by male

Posted by Krishna Yadav Krishna Yadav 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Utkarsh Singh 5 years, 10 months ago

During the sexual intercose....when male transfer it's sperms into female body through ******...(birth canal).... Then the sperm will travel to fallopian tube(site of fertilization)... And at there the sperm and ovum will meet and form zygote....later,it develops into a child on the 3rd layer of uterus.....

Sandesh Patil 5 years, 10 months ago

Try it

Shruti Gupta 5 years, 10 months ago

The transfer of male cells to the female body for fertilisation to happen occurs throught the sexual act. It is an intimate connection of the male and female body.

ANSWER

Defferent between endocrine and exocrine

Posted by Saurabh Kashyap 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Raunak Chauhan 5 years, 10 months ago

Endocrine gland are the ductless glands which secret their hormones directly into the blood to regulates our body functions. Exocrine gland are those gland which habe duct and they secrets their enzymes into a duct they mainly help in digestive system

ANSWER

What is gonad

Posted by Akash Gupta 5 years, 10 months ago

CBSE > Class 10 > Science

5 answers

Saksham Khanna 5 years, 10 months ago

I private parts of male and female are called gonads like the ***** and ******.

Arya Magade 5 years, 10 months ago

Organ that produces testis and ovaries are called gonad

Aadya Singh 5 years, 10 months ago

Hii?

Shiri Sengar 5 years, 10 months ago

Hi

Aadya Singh 5 years, 10 months ago

An organ that produces gamates is called gonada...for example - testies and ovaries..

ANSWER

During deficiency of oxygen in tissues of humans pyruvic acid is converted into lactic acid in the

Posted by Rukmani Devi 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Aadya Singh 5 years, 10 months ago

Muscles cells..

ANSWER

Why does calcium Flot in water

Posted by Vikas Vikas M T 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Raunak Chauhan 5 years, 10 months ago

The is because when calcium put in water it react with water and hydrogen gas which make it float on the surface of water

Miss Zainab 5 years, 10 months ago

Surface of calcium* aadya....

Aadya Singh 5 years, 10 months ago

Because the bubbles of hydrogen gas formed stick to the surface of metal..

ANSWER

Function of galvanometer

Posted by Rudraksh Goyal 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Arya Magade 5 years, 10 months ago

Galvanometer is used to detect the presence of current in the cell.

Aadya Singh 5 years, 10 months ago

It is used to detect the current in the circuit..

ANSWER

The reaction of an alcohol with carboxylic acid is called

Posted by Rukmani Devi 5 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Arya Magade 5 years, 10 months ago

Esterification

Utkarsh Singh 5 years, 10 months ago

Esterification

Aarti Lamba 5 years, 10 months ago

Esterification

Hayagreeva Kolluru 5 years, 10 months ago

Esterification

ANSWER

Mention two factor which are responsible for versatile nature of carbon

Posted by Rukmani Devi 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Arya Magade 5 years, 10 months ago

1 ) Tetra - valency 2 ) Catenation

Aarti Lamba 5 years, 10 months ago

Tetera-valency and Catenation

Soumik Sarkar 5 years, 10 months ago

1.catenation 2.tetravalency

ANSWER

What is a meaning of geotropism?

Posted by Rimjhim Shukla 5 years, 10 months ago

CBSE > Class 10 > Science

3 answers

Arya Magade 5 years, 10 months ago

Movement of shoot upwards and movement of roots downwards is called geotropism.

Praveen Kumar 5 years, 10 months ago

upward movement of shoot and downward movement of root in response to earths gravity

Shiri Sengar 5 years, 10 months ago

Hi

ANSWER

The danger signals light are red in colour why

Posted by Rukmani Devi 5 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Arya Magade 5 years, 10 months ago

Hence they can travel long distances. So they are seen easily even from faraway

Arya Magade 5 years, 10 months ago

Since 1) They have a high wavelength 2) They do not scatter like others i.e, they scatter the least .

Avika Goel 5 years, 10 months ago

Less scatter due which it doesn't spread more thus making less scattering of red colour

Shivam Sharma 5 years, 10 months ago

because its wave lenghth is high

ANSWER

Where genes are present

Posted by Abhishek Bansal 5 years, 10 months ago

CBSE > Class 10 > Science

4 answers

Saksham Khanna 5 years, 10 months ago

In chromosomes of nucleus of the cell

Arya Magade 5 years, 10 months ago

In the chromosomes.

Soumik Sarkar 5 years, 10 months ago

In chromosomes

Bal Sandhu 5 years, 10 months ago

In ovaries

ANSWER

What substances are mabe by endocrine glands

Posted by Harsh Mishra Lala 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Aarti Lamba 5 years, 10 months ago

Hormones

ANSWER

Which of the following defect cannot be cured by using lens

Posted by Kumar Rohit 5 years, 10 months ago

CBSE > Class 10 > Science

5 answers

Arya Magade 5 years, 10 months ago

Cataract. Surgery is required and the eye lens needs to be removed and replaced.

Sumit Panwar 5 years, 10 months ago

Colour blindness and cataract

Simple Agrahari 5 years, 10 months ago

Cataract

H Bansal 5 years, 10 months ago

Astigmatism.

Kumar Rohit 5 years, 10 months ago

Hypermetropia

ANSWER

What is feedback machanism ?

Posted by ?? Thakur 06 ???? 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Shreya ... 5 years, 10 months ago

It is a part of a cause and effect loop, where information about a system is returned to the controller of the system just to improve its performance .For example, like body is ability to control temperature.

ANSWER

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