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Please tell me how to make electron dot structure of hydrocarbons

Posted by Aastha Jha 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Secret ??? 4 years, 11 months ago

First write carbon as many times as the no of carbon molecules, like if you have Ethene (C2H4) then write 2 times carbon. If you have CnH2n+2 then C-C will have single bond, CnH2n then it will have C-Cdouble bond and if you have CnH2n-2 then it will have triple bond. Where n is for any number. In C2H4, C=2=n and H=4=2n so, it will have double bond. It will be like C::C. Then Both of carbon have 2 free electrons so attach 2-2 carbons with each carbon. An yaha par es s jyada nhi smajaya ja sakta

ANSWER

What is Malpighian capsule

Posted by Ishika Kumari 4 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 8 months ago

Malpighian capsule refers to the blood filtering component of the kidney. It is also called the renal corpuscle. The main function of the Malpighian capsule is the filtration of blood. The two components of the Malpighian capsule are the Bowman's capsule and the glomerulus.

ANSWER

Project on our invorinment

Posted by Abhishek Kaithwar 4 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Reproduction health

Posted by Aryan Joshi 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Tanu Choudhary # 4 years, 11 months ago

Reproductive health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity, in all matters relating to the reproductive system and to its functions and processes.

ANSWER

What is lymph and why it is nessary for our body

Posted by Shashi Devi 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Madesh Madesh 4 years, 11 months ago

Nandaa

Neha Barthwal 4 years, 11 months ago

The lymphatic system helps maintain fluid balance in the body by collecting excess fluid and particulate matter from tissues and depositing them in the bloodstream. It also helps defend the body against infection by supplying disease-fighting cells called lymphocytes

ANSWER

reproduction in eukaryotes

Posted by Piyush Singh 4 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

reproduction in prokaryotes

Posted by Piyush Singh 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

A . 4 years, 11 months ago

Asexual mode of reproduction takes place (binary fission)

ANSWER

Why do acid not show acid behavior in the absence of water?

Posted by Aradhana Rai 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Kiran Kumari 4 years, 11 months ago

In absense of water acid do not contain hydrogen ion or hydronium ion so acid not show acidic behaviour in absence of water.

Kartik Singla 4 years, 11 months ago

Because acids did not dissociate H+ion in absence of water

Unknown Girl 4 years, 11 months ago

In the absence of water (sorry galti s acid Wright Kr diya)

Unknown Girl 4 years, 11 months ago

Because acids do not dissociate to produce H± ions in the absence of acids

Shivani Kumari 4 years, 11 months ago

Because acid didn't release H+ ions in absence of water

ANSWER

What is BMI

Posted by Ankur Mishra 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Amit Sharma 4 years, 11 months ago

W/height in cm

Secret ??? 4 years, 11 months ago

Weight in meters??? I heard it for the first time!! Actually I intended to write perameters later but I forgot. Weight in kg and height in metres.

Alok Yadav 4 years, 11 months ago

Body mass index , It is calculated by take weight in meters divide the weight by the square of the height.

Secret ??? 4 years, 11 months ago

It is measured by dividing weight by height². If it is below 18.75 that means you are y undernourished and if it is over 25 you are obsessed

Siya Singhal 4 years, 11 months ago

Body mass index

ANSWER

In humans in which form food are stored

Posted by Ankur Mishra 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Archana Nair 4 years, 11 months ago

Glycogen. In most of the heterotrophs food is stored as glycogen

Shivani Kumari 4 years, 11 months ago

Glycogen

Gargi Nawghade 4 years, 11 months ago

glycogen

Secret ??? 4 years, 11 months ago

Foods are stored in the form of glycogen in humans

ANSWER

Why magnet not attracted to North pole to North pole

Posted by Faizan Hussain 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Secret ??? 4 years, 11 months ago

Aaaa.... That's a property of magnets. Not only north poles repel but same charges also repel. You also heard that, opposites attract and may be experienced in your real life also. It's not necessary that every thing attracts every other things, it may repel also. Well.... That's a good question keep it up ???

Ankur Mishra 4 years, 11 months ago

As like poles repel each other whereas unlike poles attract each other and hence north pole and north pole being like pole they repel each other

Tavleen Kaur 4 years, 11 months ago

North poll doesn't get attracted with other magnet's North pole because like polls always repel each other.

ANSWER

Anshika(sumesh), you should know that HFC stands for hudrofluorocarbons not for hydro chloro fluorocarbon. The main reason for banning CFC is that it has chlorine which when it (CFC) comes in contact with uv rays gives Cl gas. Free chlorine atoms then react with ozone molecules, taking one oxygen atom to form chlorine monoxide and leaving an ordinary oxygen molecule. Cl monoxide again breaks into Cl and O. This process is repeated thousands of times......... In short if HFCs were have Cl then what is the benefit of replacing cfc with it.

Posted by Secret ??? 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Hye ya I am also gorgeous ??

Jagrati Sharma 4 years, 11 months ago

Hlw everyone...... How are you????????

Tanu Choudhary # 4 years, 11 months ago

???

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Ohk thanks

ANSWER

Who is the first member of cycloalkane

Posted by Monu Jat 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Secret ??? 4 years, 11 months ago

It's okay ????

Ayush Kapoor 4 years, 11 months ago

Sorry its cyclopropane because no single or two carbon can together make a figure as cyclo means closed figure

Secret ??? 4 years, 11 months ago

Cyclopropane.

Ayush Kapoor 4 years, 11 months ago

Its propane

ANSWER

Is Haemoglobin is a type of respiratory pigment

Posted by Puspanjali Pradhan 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Kiran Kumari 4 years, 11 months ago

Yes

Secret ??? 4 years, 11 months ago

One more thing you should know that main and common function of all pigments, except some like haemoglobin, is to trap light or sunlight.

Ayush Kapoor 4 years, 11 months ago

Yes because it transport oxygen all over the body. It combines with oxygen and form oxyhaemoglobin. It is also called respiratory pigment.

Ankur Mishra 4 years, 11 months ago

Yes it is, it bind up with oxygen and Carries it to every part of the body

Rahul Kumar 4 years, 11 months ago

Yes it is.

ANSWER

Efforts are being made for substituting the chemical like CFCs why?

Posted by Parica Tri 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Anushkaa Jain 4 years, 11 months ago

the CFC gas is hugely responsible for the depletion of the ozone layer that protects us from UV rays of the Sun . And the depletion of the ozone layer results into skin cancer, cataract and other harms. So. It should be substituted.......

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Instead of CFCs we start to use hydro chloro fluoro carbon(HFCs) , which has less effective than CFCs

ANSWER

What are chromosomes? Explain how is sexually reproducing organisms the number of chromosomes is the progeny is maintained...

Posted by Jagrati Sharma 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Jagrati Sharma 4 years, 11 months ago

Thanks for this answer .......???

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Actually mere bio ki teacher ka period nahi lag raha , bass iske do chapter reh rahe hai or bake sari book complete hogayi mere??☺️,ya be friends,

Jagrati Sharma 4 years, 11 months ago

Koi nhi yrr... Be a friend And bio learn kr lo exam mein aaye ga ??

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Hye , mujhe bio nahi ati??,I don't know the answer, and thanks to give my answer yesterday , if you recall my question where I commented that you are cheating it from Google , may you take it seriously , so sorry for that, and I don't know the answer of question bass itna hi pata hai Chromosomes are thread-like structures located inside the nucleus

ANSWER

A shiny brown coloured element 'X' on heating in air becomes black in colour. Write the name of the element 'X' and the name and Formula of the black coloured compound.

Posted by Pihu ✨ 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Ankur Mishra 4 years, 11 months ago

Element x is copper On reacting with oxygen it turns black Reaction involved is 2Cu+o2=2cuo

Shubham Chaudhary 4 years, 11 months ago

X- copper Name of oxide- copper oxide Formula-CuO

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Element will be copper, name of compound is copper oxide , CuO

ANSWER

# ???????? ????? ? ℎ??ℎ?? ??????????? ??? ??? ?????? ????? ? ????????? ?? ??????????, ??? ????? ?ℎ??ℎ ?? ? ???????? ???? ?? ?? ℎ??????? ??? ?????? ?? ???? ?? ?????????ℎ ???? ?ℎ??

Posted by Himan Shu 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Because of low ignition temperature , which extinguished the ? fire

Tae Ri 4 years, 11 months ago

Beacuse a chemical compound formed(product) have different properties from the elements (reactant)

Akkshay A 4 years, 11 months ago

Whe

ANSWER

Sulphur dioxide + Hydrogen Sulphide gives Sulphur and water molecule (also mention state of compound )

Posted by Prabodini Nakte 4 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

An object 4 cm in size is placed 25 CM away from the concave mirror whose focal length is 15 CM find the nature size and position of the image

Posted by Kunal Kishore 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Ankur Mishra 4 years, 11 months ago

H= 4cm U=-25 cm F=-15cm V=? m=? By mirror formula 1/f=1/v+1/u 1/-15cm= 1/v+ 1/-25cm 1/-15cm-1/-25cm= 1/v Bs karke aage ka nikal liyo

Sant Singh 4 years, 11 months ago

Given: h° = 4 cm u = -25 cm f = -15 cm Using mirror formula 1/f = 1/v +1/u 1/-15 = 1/-25 + 1/v v = -35.5 cm m = -v/u = hi/h° m = -(-37.5)/-25 = hi/4 hi = 150/25 hi = 6 Hence, nature of image is real and inverted and image is magnified

ANSWER

what is speciation . state any two factors which can lead to speciation .

Posted by Tanu Kuhar 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Ankur Mishra 4 years, 11 months ago

Is saal nahi aa rha h

Shubham Chaudhary 4 years, 11 months ago

Ye concept cut nhi hua h kya

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Speciation is an evolutionary process. Factors lead speciation is changing in climatic conditions , drastic repletion in DNA copying and reproductive isolation

ANSWER

Back cross

Posted by Sumesh ☺️☺️☺️ 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Ohh tumne I'd change kar de , mai to confuse ho gayi thi??,achaa english ki baat kar rahi ho , koi nahi , agar phir bhi nahi ati to bata dena mai bata dungi easy way mai☺️☺️☺️

Teresa Singh ✌🏻 4 years, 11 months ago

Extra class...(◕‿◕)

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Good morning, or kis chiz ki baat kar rahi ho , konse help❓❓

Teresa Singh ✌🏻 4 years, 11 months ago

Yeah, it's really helpful app for English....✌️ Thank you!!?? Good Night.....???

ANSWER

The valeny of carbon

Posted by Sonu Kumar 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Kiran Kumari 4 years, 11 months ago

Valency of carbon is 4 it make covalent bond

Ambika Kumari 4 years, 11 months ago

The valency of carbon is four(4) and one atom of carbon can make four covalent bonds.

Vidit?️?️ Yadav 4 years, 11 months ago

Valency is 4

Sumesh ☺️☺️☺️ 4 years, 11 months ago

4

Chandan Kumar 4 years, 11 months ago

4

ANSWER

1) Why iron does not burn on heating but iron filling burn vigorously when sprinkled in the flame of burner ?

Posted by Tanisha Das 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Tanu Choudhary # 4 years, 11 months ago

Too much time to burn

Ambika Kumari 4 years, 11 months ago

Because the iron fillings is very small pieces of pure iron and it heats vigorously in Flame of burner.and iron does heat but it takes too large time to burn .

Kapil Rajput 4 years, 11 months ago

the use of filament

ANSWER

Derive the formula for reslutant resistance of three resistors which are in a) series b)parallel May get answer for this problem

Posted by Divya R 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Divya R 4 years, 11 months ago

Thank u so much khushi ☺️☺️

Khushi K. 4 years, 11 months ago

A in series I is same V=IR IR1+IR2+IR3=IR Cancellation of I we get R=R1+R2+R3

ANSWER

What condition is satisfied when a prism is in in the position of minimum deviation ❔❔

Posted by Sumesh ☺️☺️☺️ 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Shubham Chaudhary 4 years, 11 months ago

Angle of incidence on first surface = angle of emergence and also refracted ray is || to base of prism .

ANSWER

Is there is any relationship between retraction and mass and optical density ❓

Posted by Sumesh ☺️☺️☺️ 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Ya that's by mistake

Ayush Kapoor 4 years, 11 months ago

I think its not retraction but refraction. Answer------ as the optical density of medium increases the refraction capacity of that medium increases. And optical density of medium decreases the refraction capacity of that medium decreases. There is no realation of mass with optical density or refraction as mass means how denser the object is but optical density means how much capacity did object has to bend the ray of light

ANSWER

Define Tensile strength

Posted by Sumesh ☺️☺️☺️ 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Jagrati Sharma 4 years, 11 months ago

Never mind..

Sumesh ☺️☺️☺️ 4 years, 11 months ago

☺️☺️☺️oo may you take is seriously , but it will great if you tell me this in hindi , I can't understand it properly, ??

Jagrati Sharma 4 years, 11 months ago

Actually mene google se nhi btaya h apni book se btaya h.... Kyu ki mere mama ne C.A or meri sis.. Ne C.S Kra h so mujhe google se search krne ki jarorat hi nhi padti........ ???

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Google se dekh kar to koi bhi bata sakta hai?,, apni wording mai batate to jada achaa hot kiu ki Google mere pass bhi hai??, don't take it seriously , and thanks for it

Jagrati Sharma 4 years, 11 months ago

Tensile strength, maximum load that a material can support without fracture when being stretched, divided by the original cross-sectional area of the material.

ANSWER

an object of size 2 cm is placed in front of convex mirror of radius of curvature 20 cm on the other side of lens it images is formed 8 cm behind the mirror find the distance of an object from the mirror and size of the image

Posted by Anuj Varfa 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Ambika Kumari 4 years, 11 months ago

Ho=2cm R=20cm V=8cm R=2f 20=2f F=10cm Mirror formula, 1/f=1/v+1/u 1/10=1/8+1/u 1/u=1/10-1/8 1/u=8-10/80 1/u=-2/80 U=-80/2 U=-40 Magnification, -V/u=Hi/Ho -8/-40=Hi/2 1/5=Hi/2 Hi=0.4cm.

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Object distance is -13.33and image size is 1.5

ANSWER

main function of the white blood cells

Posted by Saksham Gamer Yt 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Ankur Mishra 4 years, 11 months ago

To fight disease and protect body from infection

Utkarsh Shukla 4 years, 11 months ago

The main function of wbc is to fight with pathogens

Sumesh ☺️☺️☺️ 4 years, 11 months ago

Protected from infection and known as defence system

Jahanvi Patel 4 years, 11 months ago

The main function of white blood cells is to help protect the human body from infection as well a other foreign materials.

ANSWER

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