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

See friends What is given in book can also be wrong Me too gave the ans ethanal but my science professor explained me that ethanal is wrong and Propanal is correct In case of ketone its correct Well i will assure to him once again. May be he could also be wrong . Thanks for ur suggestions.

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Honey... ??#Girl 6 years, 3 months ago

??ji ji vhi ..same to same ??

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Miss. 1234 6 years, 3 months ago

bnjao nhii mtt bno?

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Honey... ??#Girl 6 years, 3 months ago

Yeah.... Rttu totta bnjao ?????

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Miss. 1234 6 years, 3 months ago

plzz ap book ko ratto mtt smjho....???advance me tip h.....

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Miss. 1234 6 years, 3 months ago

unnati sis mujhe smjh nhii propanal apko kis angle se iska answer lgta h........ethane or propane me bhot frk ....... aldehyde ethane ka ethanal hoga .....and aldehyde propane ka propanal hoga..........ap ques me agr ethane ke place pe propane likhoge to answer propanal hoga.....becoz apne ethane likha hai to answer hai ethanal .....suffix al lagega......!!!

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Lucifer ? Morningstar? 6 years, 3 months ago

Give my answer

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Unnati Agarwal 6 years, 3 months ago

Ab samagh mein aaya Propanal hii correct ans h

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Honey... ??#Girl 6 years, 3 months ago

Me too sure ??

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Unnati Agarwal 6 years, 3 months ago

Ethane C2H6 (2-C atom ) + One carbon atom gained from the functional group that is here Aldehyde COH hence resulting in three carbon atoms , propanal (prop-root word for three carbon atom )( al - suffix since resulting compound is an Aldehyde).

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Miss. 1234 6 years, 3 months ago

Maine ethanal kaha tha answer aur wahi rahega !!! I'm sure I'm right!!!! ?

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Honey... ??#Girl 6 years, 3 months ago

??yupp miss ?

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Honey... ??#Girl 6 years, 3 months ago

ETHANAL ?

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Lucifer ? Morningstar? 6 years, 3 months ago

There u get right answer that is Ethanal

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Lucifer ? Morningstar? 6 years, 3 months ago

First go in carbon and compounds and see important question of 3 marks

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Unnati Agarwal 6 years, 3 months ago

Propanal h ol nahi Miss

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Miss. 1234 6 years, 3 months ago

choro honey hmara answer to ethanal tha aur vahi rahega???

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Shivam Mishra 6 years, 3 months ago

deep ethanol...oh city ki ha

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Lucifer ? Morningstar? 6 years, 3 months ago

Ethanal is right Unnati

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Honey... ??#Girl 6 years, 3 months ago

Ethanol ol... OH

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Unnati Agarwal 6 years, 3 months ago

Arjun tum kaha ke ho means from which city

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Miss. 1234 6 years, 3 months ago

but aldehyde ka suffix al hota h phit ethanol ol kese???

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Unnati Agarwal 6 years, 3 months ago

Its propanal since ethanal (2 carbon atom ) + from aldehyde (1 carbon atom ) = 3 carbon atom . Que is an aldehyde DERIVED from ethane.

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Honey... ??#Girl 6 years, 3 months ago

Ethanal *

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Honey... ??#Girl 6 years, 3 months ago

Arjun etanal is correct yarr

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Honey... ??#Girl 6 years, 3 months ago

Ryt miss... Hum gwaar aap mahan ???

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Lucifer ? Morningstar? 6 years, 3 months ago

Ethanol

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Miss. 1234 6 years, 3 months ago

hmare pas itta dimag nhii h....ap mahan h ap hi bta dijiye??

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Lucifer ? Morningstar? 6 years, 3 months ago

Then what is the right answer Unnati

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Honey... ??#Girl 6 years, 3 months ago

Unnati dear u first check ur self.... U tell answer then? ??

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Miss. 1234 6 years, 3 months ago

toh phir dear sis ap hi bta dijiye kripa krke answer kya hoga ye nhi hoga to???

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Unnati Agarwal 6 years, 3 months ago

Thoda dimag lagao koi

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Unnati Agarwal 6 years, 3 months ago

Arjun Verma wrong ans h ethanal nahi hoga

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Honey... ??#Girl 6 years, 3 months ago

Arjun and Miss I m also correct ?????

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Honey... ??#Girl 6 years, 3 months ago

Ethanal is correct (CH^3CHO)

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Lucifer ? Morningstar? 6 years, 3 months ago

Ethanal(CH3CHO)

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Lucifer ? Morningstar? 6 years, 3 months ago

Right anwer

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Miss. 1234 6 years, 3 months ago

ok dear tum hi bta do??

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Unnati Agarwal 6 years, 3 months ago

Wrong dear

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Miss. 1234 6 years, 3 months ago

Ethanal

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ANSWER

Function pf seminal vessel

Posted by Shubham Singh Rajput 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 6 years, 3 months ago

Seminal vesicles , prostate gland and Cowper's gland are the accessory glands in the male reproductive system in human beings.

The function of SEMINAL VESICLES is to store sperms and to secrete seminal fluid that makes the sperm active.

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Lucifer ? Morningstar? 6 years, 3 months ago

function of the seminal vesicles is to both produce and store fluid that will eventually become semen

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ANSWER

What is reproduction ??

Posted by Ch Rekha Gujjar 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Arun Kirar 6 years, 3 months ago

The process of producing young ones of their own kind is called. Reproduction.

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Lucifer ? Morningstar? 6 years, 3 months ago

The process through which new offspring is reproduce .

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ANSWER

What is ampotheric reaction

Posted by ꧁༒Ķïłłěŕ_Ṩนℑåł༒꧂, Sharma 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Unnati Agarwal 6 years, 3 months ago

Amphoteric metals when react with oxygen to form Amphoteric oxides , this reaction is known as Amphoteric reaction Zn + O2 gives ZnO or one more ex is Al + O2 gives Al2O3 .

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ANSWER

What do the letters potential difference stand for ?

Posted by Ahzam Anas 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Divyashree Patnaik 6 years, 3 months ago

Potential difference is reffered as the difference of electric pressure. & it is the difference in concentration of electrons in two terminals.

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ANSWER

What is carbon dating method?

Posted by Anurupa Debnath 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Rajendra Rajendra P G 6 years, 3 months ago

Radiocarbon dating (also referred to as carbon dating or carbon-14dating)is a method for determining the age of an object containing organic material

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Lucifer ? Morningstar? 6 years, 3 months ago

Radiocarbon dating/carbon dating is a method for detecting the age of an object containing organic material by using yhe properties of radiocarbon.

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ANSWER

What do u mean by sponification?

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

CBSE > Class 10 > Science

5 answers

Ram ? 6 years, 3 months ago

Shall i follow u

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Unnati Agarwal 6 years, 3 months ago

Pi bond in hexene ? Nahi bataye tum

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Unnati Agarwal 6 years, 3 months ago

The reaction as follows CH3COOC2H5 + KOH gives CH3COOK + C2H5OH .

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Unnati Agarwal 6 years, 3 months ago

Ab mere ka ans do Mr.

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Unnati Agarwal 6 years, 3 months ago

Preparation of soap and glycerol as a biproduct from esters is known as sponification.

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ANSWER

Ye que ka ans batao agar dam h kisi mein ? How many sigma and pi bonds are there in hexene and benzene molecule ?

Posted by Unnati Agarwal 6 years, 3 months ago

CBSE > Class 10 > Science

15 answers

Lucifer ? Morningstar? 6 years, 3 months ago

Ohoo

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Unnati Agarwal 6 years, 3 months ago

To check if someone is there in competition Since abhi koi serious nahi h

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Lucifer ? Morningstar? 6 years, 3 months ago

Give answer of my English question

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Lucifer ? Morningstar? 6 years, 3 months ago

Then why u asked?

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Lucifer ? Morningstar? 6 years, 3 months ago

Where n stand for no. Of carbon atom and N stand for no of hydrogen atom

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Lucifer ? Morningstar? 6 years, 3 months ago

No of sigma bond=n+N-1

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Unnati Agarwal 6 years, 3 months ago

I know Mr.

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Lucifer ? Morningstar? 6 years, 3 months ago

No of pi bonds =(2×n-N)/2+1

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Lucifer ? Morningstar? 6 years, 3 months ago

You should remember the formula for bonds

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Lucifer ? Morningstar? 6 years, 3 months ago

No. Of Pi bond in hexene=1

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Unnati Agarwal 6 years, 3 months ago

And pi bonds in hexene ?

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Unnati Agarwal 6 years, 3 months ago

Ab batao iska maine tumhare ka bata diya

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Lucifer ? Morningstar? 6 years, 3 months ago

In hexene=17 sigma bond

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Lucifer ? Morningstar? 6 years, 3 months ago

In benzene=12 sigma bond and 3pi bond.

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Lucifer ? Morningstar? 6 years, 3 months ago

First u give my answer .

4Thank You

ANSWER

What is the ph value of 10

Posted by Hardeep Duhan 6 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Divyashree Patnaik 6 years, 3 months ago

10 is the pH value itself..

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Rajendra Rajendra P G 6 years, 3 months ago

It statical hypothesis testing the pH value is the pribability of obtaining test results at least an extraeme as the reasult actually

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Unnati Agarwal 6 years, 3 months ago

Q is wrong

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ANSWER

Give me examples of genotype???

Posted by Shreyas Samarth 6 years, 3 months ago

CBSE > Class 10 > Science

9 answers

Honey... ??#Girl 6 years, 3 months ago

Kya? ?

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Shreyas Samarth 6 years, 3 months ago

Pls mt bol ☺️☺️☺️

2Thank You

Honey... ??#Girl 6 years, 3 months ago

Hi Einstein ???????

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Shreyas Samarth 6 years, 3 months ago

????????

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Shreyas Samarth 6 years, 3 months ago

Honey...?‍??‍??‍??‍??‍?

1Thank You

Shreyas Samarth 6 years, 3 months ago

Hii

1Thank You

Honey... ??#Girl 6 years, 3 months ago

Pdhaku ??

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Honey... ??#Girl 6 years, 3 months ago

Hi ?

1Thank You

Lucifer ? Morningstar? 6 years, 3 months ago

Certain diseases, certain habits and eyecolor e.t.c.

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ANSWER

Joule law of heating

Posted by Palak Bishnoi 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

When a current of I (amperes) passes through a circuit of resistance R (ohms) for a time of t (seconds) then the heat produced is given by the relation
H=I²Rt (joules)
This relation is known as Joule’s law of heating. It states that the heat produced is proportional to (i) the square of the current I, (ii) resistance of the circuit R, and (iii) the time t during which the current flows through the circuit.

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ANSWER

An electron beam enters a uniform magnetic field at right angles to it. State direction which this electron beam will deflect. State the principle

Posted by Aneeta Paul 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

Given, electron enters a uniform magnetic field at right angles.
The electron will move normally outward.
Fleming's left hand rule
Stretch the forefinger, the central finger and the thumb of the left hand mutually perpendicular to each other. If the forefinger points in the direction of the magnetic field, the central finger in the direction of current, then the thumb points in the direction of force on the conductor.

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ANSWER

Which organal act as a side of photosynthesis

Posted by Narbada Subba 6 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Arun Kirar 6 years, 3 months ago

Site of photosynthesis is. Cytoplasm..

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Aadya Singh ? 6 years, 3 months ago

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Aadya Singh ? 6 years, 3 months ago

Chloroplast act as an site of photosynthesis...

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ANSWER

Example of genotype.....jb koi pratap kisi ko gali de to woh apne baap se sikha hoga...?????

Posted by Shreyas Samarth 6 years, 3 months ago

CBSE > Class 10 > Science

6 answers

Arun Kirar 6 years, 3 months ago

You are right!!!!

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Khushi ?? 6 years, 3 months ago

Haa..ho bhi skta h

1Thank You

Shreyas Samarth 6 years, 3 months ago

M class ja rha hu bye ??

2Thank You

Miss. 1234 6 years, 3 months ago

3Thank You

Abhinav ? 6 years, 3 months ago

5Thank You

Shivam Mishra 6 years, 3 months ago

haa shi kha apne

4Thank You

ANSWER

Is meosis and meotic both are same

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

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

Organisms grow and reproduce through cell division. In eukaryotic cells, the production of new cells occurs as a result of mitosis and meiosis. These two nuclear division processes are similar but distinct. Both processes involve the division of a diploid cell, or a cell containing two sets of chromosomes (one chromosome donated from each parent).

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ANSWER

What do u mean by Genetic drift?

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

CBSE > Class 10 > Science

4 answers

Fan Favorite 6 years, 3 months ago

Tatti

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Chhaya Sharma 6 years, 3 months ago

Appearance of variations by chance in small population

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Yogita Ingle 6 years, 3 months ago

GENETIC DRIFT:- When the frequency of some genes gets changed in a small population due to some accidental reasons, such phenomenon is known as Genetic Drift. Genetic drift can give rise to different changes in sub-populations. It is random and rarely produces adaptations to the environment.

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Shreyas Samarth 6 years, 3 months ago

Sudden change in species. It is high in small population nd less in more population.

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ANSWER

Why oygenated nd deoxygenated blood should be separated??

Posted by Shreyas Samarth 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 6 years, 3 months ago

(a)It is necessary to separate oxygenated and deoxygenated blood in mammals and birds because warm-blooded animals such as birds and mammals maintain constant body temperature by cooling themselves when they are in a hotter environment and by warming their bodies when they are in a cooler environment.
(b)Hence, these animals require more oxygen for more cellular respiration so that they can produce more energy to maintain their body temperature. Thus, it is necessary for them to separate oxygenated and de-oxygenated blood, so that their circulatory system is more efficient and can maintain their constant body temperature.

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Aadya Singh ? 6 years, 3 months ago

Because it makes circulatory system more efficient and help in maintaining constant body temperature.....

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ANSWER

The image of candle flame formed by a lens is obtained on a screen placed on the other side of the lens.if the image is three times the size of the flame and the distance between lens and image is 80 cm, at what distance should the candle be placed from the lens?what is the nature of the image at a diatance of 80 cm and the lens?

Posted by Swati Agrawal 6 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is polymerisation?

Posted by Miss .K ?? 6 years, 3 months ago

CBSE > Class 10 > Science

4 answers

Miss .K ?? 6 years, 3 months ago

Shut your mouth Rajan Pandey

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Rajan Pandey 6 years, 3 months ago

You don't know

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Yogita Ingle 6 years, 3 months ago

Polymerization: A process of making the monomer molecules react together in a chemical reaction and produce three-dimensional networks or polymer chains is called polymerization.

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Lucifer ? Morningstar? 6 years, 3 months ago

polymerisation - a chemical process that combines several monomers to form a polymer or polymeric compound

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ANSWER

Hydrogen sulphide react with silver and form silver sulphide, Hydrogen. Hydrogen is more reactive than silver then why is this reaction possible?

Posted by Sumit Gupta 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Aadya Singh ? 6 years, 3 months ago

Before the reaction with hydrogen sulphide , silver undergoes oxidation and form silver oxide. And this silver oxide react with hydrogen sulphide to form silver sulphide and H2O.

2Thank You

ANSWER

How does the creation of variations in a species promote survival????

Posted by Dr. Sanskari ?‍⚕️?‍⚕️❤⚘ 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

Some of the variations may be helpful to the organisms in the prevailing natural conditions. Organisms with such positive variations would survive. Over the period variations keep appearing in a species. The favorable variations are chosen by natural selection and promotes survival of the species.
Depending on the nature of variations different individuals would have different kinds of advantage e.g., Bacteria variants which can tolerate heat have better survival chances in heat wave in comparison to non-variant bacteria having no capacity to tolerate heat wave.
However not all variations are useful or beneficial.

1Thank You

ANSWER

name the chemical compound which is used as disinfecetant for water

Posted by Tanya Rai 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 6 years, 3 months ago

Disinfectants Sodium hypochlorite. Sodium hypochlorite (NaOCl) is a compound that can be effectively used for water purification. It is used on a large scale for surface purification, bleaching, odor removal and water disinfection.

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Dr. Sanskari ?‍⚕️?‍⚕️❤⚘ 6 years, 3 months ago

Chlorine is widely used.....

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ANSWER

Difference between Genotype and Phenotype.

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

CBSE > Class 10 > Science

3 answers

Ádítî Chàûdhäry 6 years, 3 months ago

Phenotype_ physical appearance Genotype_ genetic composition

2Thank You

Abhinav ? 6 years, 3 months ago

Phenotype is the physical appearance of an organism, while the Genotype is the genetic composition of an organism.

4Thank You

Abhinav ? 6 years, 3 months ago

Bro..eyes weak na h hum logo ki..chota likho yrr

5Thank You

ANSWER

How genes control the charecter

Posted by Abhi Lanka 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Dr. Sanskari ?‍⚕️?‍⚕️❤⚘ 6 years, 3 months ago

Genes r the functional unit of DNA hence,the parent information transferred in them through their parent dna allows the individuals to follow the same characteristics..

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ANSWER

List the aquired and inherited traits

Posted by Yogeshwaran A 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Dr. Sanskari ?‍⚕️?‍⚕️❤⚘ 6 years, 3 months ago

Acquired traits are learned traits which we have learned from someone and inherited traits are genitically acquired character which were transferred in them through their parent DNA.

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Abhi Lanka 6 years, 3 months ago

Aquired Traits:sickness due to starvation,etc. Inherited Traits:AIDS from mother,etc.

1Thank You

ANSWER

Define acid and base.

Posted by Priya Kumari 6 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Tanish Chimaniya 6 years, 3 months ago

Acid is a substance which dissociate (or ionises) on dissolving in water to produce H+ ions), whereas base is a substance which dissociate (or ionises) on dissolving in water to produce OH- Ions.

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Dr. Sanskari ?‍⚕️?‍⚕️❤⚘ 6 years, 3 months ago

Acids releases H+ ion and base releases OH-ion. Acids turns blue litmus to red and bases turns red litmus blue.

1Thank You

Abhi Technical 6 years, 3 months ago

Acid are those substance which have sour taste whereas base are those which have bitter taste . Acid turn blue litmus to red but base turn red litmus to blue.

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ANSWER

Find the size ,nature and positon of image formed when an object of size 1 cm is placed at a distance of 15 cm,from a concave mirror of focal length 10 cm.

Posted by Mohana Sundari 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Lucifer ? Morningstar? 6 years, 3 months ago

v=-30cm, height of image=-2 cm nature=real and inverted

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Aviral Goyal 6 years, 3 months ago

Position v=-30cm nature-real and inverted size=-2cm

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ANSWER

What is the law of refraction ?

Posted by Anmol Mehra 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Aadya Singh ? 6 years, 3 months ago

The refraction of light on going from one medium to another takes place according to two laws which are known as laws of refraction of light. These are :
According to first law of refraction: The incident ray, refracted ray and the normal at the point of incidence, all lie in the same plane.
According to second law of refraction: The ratio of sine of angle of incidence to the sine of angle of refraction is constant for a given pair of media.

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ANSWER

Our friendship is like Gold?, Strong??, Bright ? and exclusive? ...I hope that it never Ends. Be HAPPY MY LOVELY ?FRIEND ?

Posted by Honey...?? #Girl 5 years, 11 months ago

CBSE > Class 10 > Science