CBSE > Class 12 > Chemistry | CBSE Board | Homework Help

Vese ..ager agli baar usse baat hue toh darsh ko Happy New year bol dena meri taraf se..bolna ki maine bola hai...mai yhi bol deta but wo yaha hai nhi

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Rohan Řąjpůť 6 years ago

1Thank You

Aman Kumar 6 years ago

????sahi hai fir

1Thank You

Rohan Řąjpůť 6 years ago

yup.. thanks. ??

1Thank You

Rohan Řąjpůť 6 years ago

dost nhi bhai hai tu mera. ???

1Thank You

Shivani Thakur 6 years ago

Soory it's nda.....congratulations??

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Shivani Thakur 6 years ago

Ohh great ?,.....rohan u had cracked nfa!!

1Thank You

Aman Kumar 6 years ago

Mujhe pata hai ...ki starting mai tum mujhe thoda galt samjh rahe hoge...but Don't wry, mujhe jara sa bhi bura nhi laga☺️☺️...Aur waise bhi...future mai jo hona hoga wo toh hoga hi..So, Jo hoga dekha jayega☺️....Hope new year also brings lots of happiness in ur lyf??

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Aman Kumar 6 years ago

Yaar, ye kardi na tumne choti baat?..tumhi batao frnds ki baat ka koi bura manta hai kya......toh mai kaise tumhari kisi bhi baat ka bura maan sakta hu☺️☺️...tumhe sry bolne ki jarurat nhi.....Bus tum ek kaam kar sakte ho mere liye..Ki tum mujhko bus dost maan lo....aur kuch nhi chahiye??....

1Thank You

Rohan Řąjpůť 6 years ago

and one thing more bro... sry for everything.. dekho mai indirectly bolunga... maine usko aur tum ko leker bht glt smjha... nd after that I realise that ke tum Sirf frnds ho... infact tum subke saath utne he frndly ho... so sorry bro meri koi v baat tumhe buri lgi ho. maine usey bhi bola hai aur abb tumhe bhe bol raha hoon. ???. now everything is going fine... sub pehle jesa ho gya... bilkul in the end sub thik ho gya. so, bro sry. agar meri ki v baat buri lgi ho toh.

1Thank You

Rohan Řąjpůť 6 years ago

Happy new year bro. ?hope this year will bring all happiness in ur lyf.

1Thank You

Rohan Řąjpůť 6 years ago

thanks bro. ?study hard for JEE

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Aman Kumar 6 years ago

Thanks bro...?..koi baat nhi , u also take care???..And Ya Happy New year in advance?

1Thank You

Aman Kumar 6 years ago

Oooh..thats great yaar...u cracked NDA..All the best for ur SSB??...mere bhi ek dost ka NDA crack ho gya hai☺️...chalo acha hai...all the best

1Thank You

Rohan Řąjpůť 6 years ago

yes bro thnd bht hai.. it's 2.8 °C tomorrow.. aur aaj bhi itna he hoga... aur hnn sahi hai go becz kl he pre boards khtm hue hai.. kher rahi baat puchne ki toh... maine har jagaha se exit le li hai... so possible nhi hai baat krna kisi bhi bacche se schl ke..u to take care bro.

1Thank You

Rohan Řąjpůť 6 years ago

kr rhe hai... bus formality ke liye de raha hoon becoz I already crack NDA... I have 0 interest in engineering... NDA clear ho gya aur Pura focus abb ssb pr hai... but mains DE raha hoon Delhi kya hota kuch khas kiya nhi hai.

1Thank You

Aman Kumar 6 years ago

BTW, Delhi mai toh bahot thand per rahi hai... bro..health ka dhiyan rahkna...and haan Darshana kaisi hai? I mean, I m talking about health..as u know, waha pe thand bahot jada ho gya hai..

1Thank You

Aman Kumar 6 years ago

Wlc bro.....By the way, tum Jee mains ka exam toh de hi rahe hoge......so , how is ur preparation ?

1Thank You

Rohan Řąjpůť 6 years ago

0.281 correct bro thanks

1Thank You

Aman Kumar 6 years ago

Sorry, I think this is the answer ,..just check it once?? ...We know, E°cell = E°cathode -E°Anode ... So, E°cell = E°Cu^2+/cu - E°Ni^2+/Ni ...=> E°Ni^2+/Ni = 0.34 - 0.059 = 0.281... Therefore, E°Ni^2+/Ni = 0.281 ..ans..

1Thank You

Aman Kumar 6 years ago

Kya answer 0.25 V hai??

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Aman Kumar 6 years ago

Bro

1Thank You

Rohan Řąjpůť 6 years ago

ohk bro

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Aman Kumar 6 years ago

Wait bro I m trying

1Thank You

Aman Kumar 6 years ago

Wait..bro..I m trying ?

2Thank You

ANSWER

Ch 4 all sums solution

Posted by Desai Kashish 6 years ago

CBSE > Class 12 > Chemistry

2 answers

Shivani Thakur 6 years ago

And also ncert is sufficient.?

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Shivani Thakur 6 years ago

Cbse guide app m sb miil jayeega,,,if u want soo!

0Thank You

ANSWER

How will you prepare r-cooh from nitrile

Posted by Deepak Kumar 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Rahul Vr 6 years ago

Complete hydrolysis

0Thank You

ANSWER

How will u prepare r-cooh from alcohol

Posted by Deepak Kumar 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Shivani Thakur 6 years ago

By oxidizing alxhols vth kmno4,,,

1Thank You

ANSWER

Complete the following reaction hcho+ naoh-?

Posted by Deepak Kumar 6 years ago

CBSE > Class 12 > Chemistry

2 answers

Yuvraj Singh 5 years, 11 months ago

Cannizaro Reaction

0Thank You

Moni Sheoran@2#3% 6 years ago

HCHO+NaOH--------------> CH3OH+HCOONa reagent----50%/conc.NaOH

1Thank You

ANSWER

Complete the following reaction ch3cho+hcn-?

Posted by Deepak Kumar 6 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Complete the following reactions ch---ch+h2o-?

Posted by Deepak Kumar 6 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How will u convert c6h5cooh into c6h5-br-cooh

Posted by Deepak Kumar 6 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How will you convert ch3cooh into ch3-ch2-oh

Posted by Deepak Kumar 6 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How will you convert ch3cooh into ch3-ch3

Posted by Deepak Kumar 6 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Name she element which is used as a reducing agent in thermiti welding

Posted by Vishal Potla 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Samarth Singh 6 years ago

Aluminum

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ANSWER

Convery acetaldehyde into acetone

Posted by Kanishka Gupta 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Ayush Madhu 6 years ago

Acetaldehyde is treated with methyl magnessium bromide in presence of dry ether to form Mg complex which on acid hydrolysis,isopropyl alcohol is obtained. Then isopropyl alcohol is oxidised by acidified potassium dichromate to form acetone.

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ANSWER

Food cooks faster on higher altitude. Is this statement correct? Explain with reason.

Posted by Sejal Bajpeyee 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Vaibhav Srivastava 6 years ago

Yes the statement is correct as on higher altitude the pressure is higher which enables the food to cook faster.

0Thank You

ANSWER

Can u teach me haloalkane and heloarens

Posted by Shraddha Laad 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Ayush Madhu 6 years ago

Of course.

0Thank You

ANSWER

What is the project of chemistry 2019-20

Posted by Aryan Anand 6 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Project work on nylon

Posted by Ruchi Singh 6 years ago

CBSE > Class 12 > Chemistry

2 answers

Shivani Thakur 6 years ago

Including the information abour its monomeric units!

0Thank You

Shivani Thakur 6 years ago

Make a file on all the chemical properties and formation along with its application s in different -different feilds...!!

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ANSWER

Could pcc oxidise alchols to form carboxylic acids?

Posted by Shivani Thakur 6 years ago

CBSE > Class 12 > Chemistry

5 answers

Shivani Thakur 5 years, 11 months ago

Hello everyone ??....how r ur prep.going on...nd ya how can i get 95in maths nd physics??

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Shivani Thakur 5 years, 11 months ago

Okk

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Paras Thakur 5 years, 11 months ago

Yeah Pcc could be used to oxidise Alcohol into aldehyde or Ketone depending upon degree of Alcohol...

1Thank You

Shivani Thakur 6 years ago

Ohk...yaaaa i know it about kmno4 but i was confuse vth pcc..sooo thanks!!

1Thank You

Paras Thakur 6 years ago

Nope,PCC is used as a mild oxidising agent...so use KMnO4 instead of PCC...

1Thank You

ANSWER

Why swarts reaction is only applicable on AgF and HgF

Posted by Prince Sagar 6 years ago

CBSE > Class 12 > Chemistry

2 answers

Yogita Ingle 6 years ago

In Swarts’ reaction, heavy metal fluorides are used as reagents.

It is a reaction in which alkyl fluorides are formed when alkyl bromide or chloride reacts with metal fluorides.

In the reaction, higher alkyl halide(R-Cl) react with lower metal halide (AgF) to form lower alkyl halide(R-F).

If we don’t use heavy metal fluoride F ion cannot displace Cl/Br.

The reaction will not occur or it may form some other compound.

1Thank You

Hardik Singh 6 years ago

Bcoz of the reactivity order

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ANSWER

What happens After heating alcohol ?

Posted by Aman Deep 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Hardik Singh 6 years ago

Its catches fire after a certain temp.

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ANSWER

Explain Kohlrausch's Law.

Posted by Aarav Tyagi 6 years ago

CBSE > Class 12 > Chemistry

4 answers

Vishal Malik 6 years ago

Kohlraush's law states that the limiting molar conductivity of a solution is defined as the sum of all the ionic conductivities of the cations and anions each multipled by the no. Of ions present in one formula unit of the electrolyte

1Thank You

Vishal Malik 6 years ago

Neha ji the answer u have given is for Kirchoff law in physics

1Thank You

Neha Kashyap 6 years ago

According to first law the total current entering at a Junction is equal to the total current leaving the junction it is also known as junction law or loop law According to second law the potential difference or voltage across the closed circuit is zero the sum of potential difference in a closed circuit is zero is also known as Voltage law

2Thank You

Shivwndra Rajput 6 years ago

Haloalkanes

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ANSWER

Give reason: Finely divided substance is more effective as an adsorbent.

Posted by Josna Mary Thomas Thomas 6 years ago

CBSE > Class 12 > Chemistry

3 answers

Neeraj Singh 6 years ago

The extent of adsorption increases with inncrease with surface area hence finely divided substances or powdered substances acts at good adsorbents.

1Thank You

Yogita Ingle 6 years ago

Adsorption is surface phenomenon therefore adsorption is directly proportional to the surface area.

Finely divided substance has greater surface area. Greater is the surface area of the adsorbent, greater would be its absorbent power. That is why a finely divided surface is more effective as an absorbent.

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Ramanpreet Singh 6 years ago

Because surface area increases

1Thank You

ANSWER

Which 3 d series element has lowest enthalpy of atomisation??

Posted by Rajat Barwar 6 years ago

CBSE > Class 12 > Chemistry

3 answers

Rahul Vr 6 years ago

Zinc is lowest becaues it does not have any unpaired electrons.So bonding is weaker

2Thank You

Yogita Ingle 6 years ago

In 3d series enthalpy of atomisation of zinc is the lowest.

2Thank You

Rajat Barwar 6 years ago

If your answer is zinc then please explain And any other answer is welcomed...

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ANSWER

How to calculate the limiting molar conductivity for weak electrolytes

Posted by Pankaj Tanwar 6 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why pallidum has electronic configuration as 4d10 5s0

Posted by Khushi Jain 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Return To Nothing 6 years ago

Because it is more stable than 5s2 4d8

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ANSWER

What is mole fraction full explain

Posted by Sunil Jangra 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Josna Mary Thomas Thomas 6 years ago

It is the ratio of number of moles of one component to the total number of moles of all the components in a solution.

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ANSWER

why do soap not work in hard water?

Posted by Shreya Bhardwaj 6 years ago

CBSE > Class 12 > Chemistry

3 answers

Neeraj Singh 6 years ago

Soap do not work in hard water because hard water contain magnesium and calcium ion which forms insoluble calicum or magnisium soap.

0Thank You

Josna Mary Thomas Thomas 6 years ago

Bcz hard water contain Ca+ & Mg+ ions

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Darrshan Seshathrri 6 years ago

Bcoz they form insoluble Ca+ and Mg+ precipitates in hard water

0Thank You

ANSWER

What is composition of dettol

Posted by Ayaan Ali ?? 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years ago

Dettol is a well known antiseptic. It is a mixture or combination of chloroxylenol and terpineol in a suitable solvent. The structure of chloroxylenol is as follows:

1Thank You

ANSWER

What is agonists

Posted by Khushi Kirar 6 years ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years ago

Agonists are the drugs that mimic the natural messenger by switching on the receptor and are useful when there is lack of natural chemical messenger.

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ANSWER

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