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

Ask questions which are clear, concise and easy to understand.

Ask Question

Which type of soap is environment friendly, having straight chain of carbon or having branched chain of carbon? Why?

Posted by Tanishka Jain 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Raunak Chauhan 6 years, 3 months ago

The soap having staright chain are eco-friendly because it can decompose easily by our sweet bacteria

1Thank You

ANSWER

If 10000 joules of solar energy is available in grass then how much energy would be available to the deer to transfer it to lion

Posted by Rohit Bhalla 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Raunak Chauhan 6 years, 3 months ago

No, only 1joule because energy available for grass is 10000 but producer only consume one percent to the total energy and then acoording to 10%law 10%energy transfer to the deer that is 10joule and deer also transfer 10% energy to the lion that is 1joule

0Thank You

Yogita Ingle 6 years, 3 months ago

According to the law of food chain, only 10% of energy is transferred to the next level in the food chain.

Energy available to grass = 10000 J

=> Energy available to deer = 10 % of Energy available to grass

= 10/100 x 10000

= 1000 Joules

Similarly,

Energy available to lion = 10 % of Energy available to deer

= 10/100 x 1000

= 100 Joules

Hence the energy would be available to the deer to transfer it to the lion 100 Joules

0Thank You

ANSWER

What is prism ?

Posted by Ronak Petkar 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Harshit Raj 6 years, 3 months ago

A transparent glass or plastic object which separates light that passes through it into the seven different colours.

1Thank You

ANSWER

Difference between auxins and Gibberellin plant hormones?

Posted by Lucifer ? Morningstar? 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Priyanshi Sharma 6 years, 3 months ago

1)Auxin promotes growth at shoot tips while gibberlin promotes growth at growing young parts . 2) auxin promotes apical dominance,gibverlin does not 3)Auxin mainly promotes growth of shoot and root (apical parts) while gibberlin promotes growth of fruits 4) auxin helps in phototropism while gibberlin doesn't 5)gibberlin helps in breaking dormency of seeds and buds

1Thank You

Ste Phen 6 years, 3 months ago

Auxin promote growth of Shoot segment ,It also promotes root formation. Gibberellin regulates growth of vegetative part of plant,Gibberellin does not promotes rooting

1Thank You

ANSWER

Sir physics question hai topic is heating effect of electric current

Posted by Rajesh Upadhyay 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Lucifer ? Morningstar? 6 years, 3 months ago

When the heat is produce in an electric circuit := (1) it is directly proportional to square of current. := (2) it is directly proportional to resistance :=(3) it is directly proportional to time taken

1Thank You

ANSWER

Phototropism

Posted by Narj Go Eet Singh 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Lucifer ? Morningstar? 6 years, 3 months ago

The movement of plant parts in response to light is known as phototropism.

2Thank You

ANSWER

Third allotrope of carbon is?

Posted by Parampal Singh 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Lucifer ? Morningstar? 6 years, 3 months ago

Buckminsterfullerene

2Thank You

Shreya ... 6 years, 3 months ago

There are 3 allotropes of carbon: Diamond, graphite and buckminsterfullerene.

6Thank You

ANSWER

Assertion and reasoning

Posted by Prabhpreet Kaur 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Vikalp Trivedi 6 years, 3 months ago

It means that you have given assertions and reasons so you have to find that both are correct or incorrect or one correct or incorrect

0Thank You

ANSWER

IUPAC name....?????

Posted by ✳️ Queen ✳️ 6 years, 3 months ago

CBSE > Class 10 > Science

12 answers

✳️ Queen ✳️ 6 years, 3 months ago

Hello <img"https://images.app.goo.gl/KwHrcJCMJamonG556"width="30"height"50"> hello

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

<I><width="50"height="60">Byeee

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

<size="50">Byeee

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

<img"width="59"height="90""https://images.app.goo.gl/KBx8uSF2EvGfUR4E8">

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

<img="https://images.app.goo.gl/KBx8uSF2EvGfUR4E8" width= "50" height="90">

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

< img = "https://images.app.goo.gl/KBx8uSF2EvGfUR4E8" width=" 50 " height ="90" >

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

0Thank You

✳️ Queen ✳️ 6 years, 3 months ago

0Thank You

Ankesh ..?? Now I Am Fully Ready? 6 years, 3 months ago

Sis gyi kya

2Thank You

Ankesh ..?? Now I Am Fully Ready? 6 years, 3 months ago

International Union of Pure and Applied Chemistry.

2Thank You

ANSWER

what are homologous structure ? give an example

Posted by Akash Kumar 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Mudit Tyagi 6 years, 3 months ago

In a particular group the adjacent compound Is differ from CH2 and 14u (carbon mass =12 , hydrogen mass = 1 2*1= 2 )(12+2 =14u) Ex= CH4 ,C2H6

0Thank You

ANSWER

CnH2n+2This is a molecular formaulae of ?

Posted by Parampal Singh 6 years, 3 months ago

CBSE > Class 10 > Science

7 answers

Priyanshi Sharma 6 years, 3 months ago

Alkane series

1Thank You

Neeraj Singh 6 years, 3 months ago

Its an molecular formula of alkanes which are saturated hydrocarbons

1Thank You

Sushma Devi 6 years, 3 months ago

Alkane

1Thank You

Lucifer ? Morningstar? 6 years, 3 months ago

Alkane

2Thank You

Shrija Singh?? 6 years, 3 months ago

Alkane

2Thank You

Rw Hadge 6 years, 3 months ago

Alkane

1Thank You

Rudra Pratap Singh 6 years, 3 months ago

Alkane

1Thank You

ANSWER

What is homologous series?give example

Posted by Ashish Khunte 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Lucifer ? Morningstar? 6 years, 3 months ago

A series of a compound in which the same functional group substitute for hydrogen in a carbon chain is known as homologous series. Ex=methane,ethane,propane etc

0Thank You

Shrija Singh?? 6 years, 3 months ago

A homologous series is a series of carbon compounds that have different numbers of carbon atoms but contain the same functional group . For example : methane , ethane , propane , etc.

1Thank You

ANSWER

What is windmills

Posted by Pradeep Singh Tanwer 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Dhruv Baswal 6 years, 3 months ago

Wind mill is a human made technology that converts wind energy to electric energy using a dynamo

2Thank You

ANSWER

What is fossil ? Give one line answer

Posted by Ashish Khunte 6 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Nawal Jha Jha 6 years, 3 months ago

Remain or impression of dead plants and animals known as fossils

0Thank You

Ankur Raj 6 years, 3 months ago

Fossils is pre historic dead and decaying plants and animals that are found buried under the earth surface over millions of years ago.

2Thank You

Kamal Kant 6 years, 3 months ago

Reserved Traces of an organsms are called FOSSILS

2Thank You

ANSWER

What is the important of DNA copying in reproduction

Posted by Ashish Khunte 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Chandan Bhardwaj 6 years, 3 months ago

DNA copying is the basic and very important step of sexual reproduction. ✓ It provides blue print for the growth of cells. ✓ It also provides variation as DNA copying is not 100 percent perfect.

1Thank You

ANSWER

Why carbon compound are covalent in nature

Posted by Áshísh Rawat 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Shiva Bhadauria 6 years, 3 months ago

Actually, carbon is tetravalent, it doesn't have to much energy and tendency to loose or gain 4 electrons. So, it do the work of sharing and forms covalent bond.

4Thank You

ANSWER

How is the increase demand for energy affecting our environment adversely?

Posted by Prince Singh 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

With the increasing industrialization and population explosion, the demand for energy has been on an all time high. This has come with extreme repercussions, though.

The major sources of energy, the fossil fuels, are being rapidly consumed to meet our ever-growing energy needs. The implication? Our natural reserves are nearing exhaustion, meaning little or none would be left for the future generations to use.

Our environment is severely polluted- excessive use of non-green, conventional sources of energy has charred our planet. Our water, land, air are all polluted to an enormous extent: if no checks are made to the current situation, we would soon be at a point of no return.

There's a need to use renewable, green energy sources; solar energy, wind energy and geothermal energy are the need of our time. We need to tap into these limitless sources and meet our requirements responsibly.

1Thank You

ANSWER

Why is it important to make small check dams across the flooded gullies?

Posted by Aahna Sharma 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

Across the flood gullies; small check dams are made so that they hold the water and erosion of top most layer of soil can be prevented by the water. Construction of small check gullies across flood gullies also helps in recharging of ground water as water is hold for sometimes.

1Thank You

ANSWER

How to produce new baby

Posted by Sneha ** 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Harsh Kumar Verma 6 years, 3 months ago

By the process of reproduction

0Thank You

ANSWER

Why is an ammeter likely to burn out if it is connected in parallel in a circuit

Posted by Manvi Sirohi 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Manvi Sirohi 6 years, 3 months ago

What is this nonsense, have you lost your mind

0Thank You

ANSWER

Why do all allotropes of carbon does not conduct electricity

Posted by Ashish Bhamare 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Aadya Singh ? 6 years, 3 months ago

Because they don't have free electrons...

5Thank You

ANSWER

Why do all of carbon does not conduct electricity

Posted by Ashish Bhamare 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Dhruv Baswal 6 years, 3 months ago

Graphite does

0Thank You

ANSWER

What is dental plaque? What harm can it do? How can the formation of plaque be prevented ?

Posted by ✳️ Queen ✳️ 6 years, 3 months ago

CBSE > Class 10 > Science

6 answers

Ankesh ..?? Now I Am Fully Ready? 6 years, 3 months ago

Sis bata diaa maine

1Thank You

Ankesh ..?? Now I Am Fully Ready? 6 years, 3 months ago

Sis tell me how i write a text in different colour.....in my question upper one

1Thank You

Khushbu Rathod 6 years, 3 months ago

Pls u r not allowed to speak any bad words here

2Thank You

Aadya Singh ? 6 years, 3 months ago

Go and tell your sister to do this Mr. Rahul, then see what she says...

3Thank You

Aadya Singh ? 6 years, 3 months ago

Mind ur language Mr. Rahul...?

4Thank You

Aadya Singh ? 6 years, 3 months ago

A sticky, yellowish layer of food particles and bacteria cells that covered on the teeth is called dental plaque. It leads to tooth decay. Brushing the teeth regularly, after eating food, removes the plaque.

6Thank You

ANSWER

Lights

Posted by Raju Kumar 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Harsh Kumar Verma 6 years, 3 months ago

It ia a type of energy that make the things visible but it remains invisible.

1Thank You

Áshísh Rawat 6 years, 3 months ago

It is a type of energy

0Thank You

ANSWER

Advantage and disadvantage corrosion

Posted by Kapil Saini 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Cutie . 6 years, 3 months ago

Disadvantages of corrosion. 1• it is eating up metals due to attack of atmospheric gaseous on the surface of metal. 2• When silver reacts from corrosion then it became black and in copper it became green

0Thank You

ANSWER

Different from corrosion and rusting

Posted by Kapil Saini 6 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

,what is roasting

Posted by Rohit Yadav Ashu Ashu 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Abhinav ? 6 years, 3 months ago

It is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities.

3Thank You

ANSWER

Why human male reproductive system is called urinogenital system

Posted by Shrija Singh?? 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Shrija Singh?? 6 years, 3 months ago

Thanks

2Thank You

Gaurav Seth 6 years, 3 months ago

The word urinogenital is composed of two words urine and genital. Hence, urinogenital system refers to the organs of both urinary system as well as reproductive system.

It is because because both the systems originate and develop from the intermediate mesoderm. In addition, they use common ducts (urethra) for the flow of semen (product of reproductive system) and urine (product of excretory system) outside the body

1Thank You

ANSWER

Who is the very smallest cell in living organisms

Posted by Deadly Iest 6 years, 3 months ago

CBSE > Class 10 > Science