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organic phadne ke liya 12th ka 11 th ka organic jaruri h kya plzz reply karro yaar

Posted by Prashant Singh 6 years, 6 months ago

CBSE > Class 12 > Chemistry

6 answers

Divyanshu Mishra 6 years, 6 months ago

Ya, there is co-relation between 11th and 12th. Hence it is best for you to have knowledge of 11th's chapter of organic chemistry and other terms for better focus on 12th's chemistry.

Robin Rajput 6 years, 6 months ago

Kuch mat padho just relax and enjoy the life

Priya Dharshini ? 6 years, 6 months ago

11 th class is necessary ,mainly chemical bonding

Tushar Kumar 6 years, 6 months ago

90%of organic of 11is in 12.But i m not telling u t go back ,forget about,what happened in 11 ,now concentrate on 12 ALL THE VERY BEST

Utkarsh Trivedi 6 years, 6 months ago

Yes

Harsh Jeenus 6 years, 6 months ago

Yss. It will be helpful

ANSWER

calculate molality of ki if the density of 20% mass by mass aquas Potassium iodine is 1. 202 to gram

Posted by Anas Gaur 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 6 years, 6 months ago

Molar mass of KI = 39 + 127 = 166 {tex}g{\rm{ \;}}mo{l^{ - 1}}{/tex}
20% (mass/mass) aqueous solution of KI means 20 g of KI is present in 100 g of solution.
That is, 20 g of KI is present in (100 - 20) g of water = 80 g of water
Therefore, molality of the solution {tex}= \frac{{Moles{\rm{ \;of\; KI}}}}{{{\rm{Mass \;of \;water \;in\; kg}}}}{/tex}
{tex}= \frac{{\frac{{20}}{{166}}}}{{0.08}}m{/tex}
= 1.506 m
= 1.51 m (approximately)

ANSWER

Tf2 reacts with pf5

Posted by Bhagat Singh 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why the order of reaction is negative?

Posted by Rohit Gupta 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Sia ? 6 years, 6 months ago

Negative order reactions are reactions where an increase in the concentration of a reactant or product means a decrease in the rate.

Rohit Gupta 6 years, 6 months ago

Is that possible

ANSWER

What is adsorption isotherm?

Posted by Jaya Mehta 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 6 months ago

The variation in the amount of gas adsorbed by the adsorbent at constant temperature with change in pressure is shown by a curve called adsorption isotherm.

ANSWER

A colloidal solution is prepared by the given method in figure

Posted by Meenakshi Kureel 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Neopentyl chloride doesnot follow Sn2 mechanism

Posted by Harsha Chandrawanshi 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Reaction between hcl and methoxy ethane

Posted by Riya Chaudhary 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Aasta Chouhan 6 years, 6 months ago

Ch3OCh2Ch3 + HCl -------- Ch3cl + Ch2Ch3Oh

ANSWER

why powdered substances are more effective adsorbents?

Posted by ∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 6 months ago

CBSE > Class 12 > Chemistry

7 answers

Tapan Pandey?? 6 years, 6 months ago

Yaar to doobara id banane me kitna time lgta h

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 6 months ago

yahi hoon yarr tum sub toh block he ho gye ?

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 6 months ago

Vese aman , mamta ko tumhari yad aa rahi he par??......ab ye rohan kon he.??

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 6 months ago

Darshana kaha ho tum yarr.....tumhare bina man nahi lagta.....tum online aati ho yo bhoot ko lene bheju??

Rohit Gupta 6 years, 6 months ago

Because it have more surface area

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 6 months ago

thanks for answering. ✌️

Lavi Baliyan 6 years, 6 months ago

Bcz powdered form has more surface area in comparison to other form and we know that adsorption is directly proportional to the surface area..increases the surface area,adsorption will be increased

ANSWER

Outer hard shells of two eggs are removed one of the egg is placed in pure water and the other is placed in saturated solution of sodium chloride. What will be observed and why?

Posted by Suyash Tripathi 6 years, 6 months ago

CBSE > Class 12 > Chemistry

5 answers

Priya Dharshini ? 6 years, 6 months ago

Ya this is solution chapter question.... so we should answer wheather it will shrink or swell

Aman Kumar 6 years, 6 months ago

Ooo..we have to give answee in this way....thanks

Priya Dharshini ? 6 years, 6 months ago

The egg placed in water will swell due to endosmosis due to difference in concentration of protien and other egg that is in nacl solution will shrink due to osmosis.... i think so this will be correct

Aman Kumar 6 years, 6 months ago

Yr.. .....If I m wrong then correct me surly as I m 110% sure that my answer my get wrong??

Aman Kumar 6 years, 6 months ago

Bro , I m not sure about it but I will surly try once.....=> The egg which is placed in the pure water will be disslove completely..but The egg which is placed in the saturated solution of NaCl...will not be disslove completely as the solution is saturated so it does not have the tendency to dissolve anything more......

ANSWER

Can we keep zincsulphate solution in copper vessel?

Posted by Killer Arya 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Rohit Gupta 6 years, 6 months ago

Cu is more reactive than zn so Cu will displace zn from znso4 so we can't keep znso4 in cu vessel

Sumit Singh 6 years, 6 months ago

No if we kept it then it(copper) will react with Zn(SO4) and displacement reaction is takesplace

ANSWER

Reaction of dioxygen with PtF6

Posted by Arundhati Menon 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Explain why aquatic species are more comfortable in cold water rather than warm water??

Posted by Raj Mathur 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Suyash Tripathi 6 years, 6 months ago

The amount of oxygen dissolved in water decrease at higher temperature as a result it become more difficult to breathe less dissolved oxygen hence the aquatic species are not comfortable in warm water

ANSWER

What is pain oil

Posted by Manish Panday 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Anand Raj 6 years, 6 months ago

It is a mursted oil

ANSWER

Which ion is colourless?

Posted by Ashwini Chaurasiya 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Tushar Kumar 6 years, 6 months ago

Transition metals are colourless ions bcz of their empty d-orbital

ANSWER

Catenation

Posted by Premesh Tyagi 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Veerpal Kaur 6 years, 6 months ago

Catenation is properly of an element of making bonds with atoms of its own kind like carbon . This is the main reason of the existence of most of the carbon compounds

ANSWER

Any four mcqs related to ch. Electrochemistry

Posted by Gagandeep Kaur 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

why do phenols not give the protonation rxn readily?

Posted by ∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 6 months ago

thanks ?

Nasima Khan 6 years, 6 months ago

The lone pair on oxygen of O-H in phenol is shared with benzene ring through resonance so the lone pair is not fully present on oxygen hence phenol do not undergo protonation reaction electron density on oxygen in Phenoxide ion is decreased due to resonance.

ANSWER

What is the effect of temperature and pressure in solubillity of solids in liquids???........????????

Posted by Aman Kumar 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 6 months ago

Temperature: By changing the temperature we can increase the soluble property of a solute. Generally, water dissolves solutes at 20∘C or 100∘C.. Sparingly soluble solid or liquid substances can be dissolved completely by increasing the temperature. But in the case of gaseous substance, temperature inversely influences solubility i.e. as the temperature increases gases expand and escapes from their solvent.
Pressure: Gaseous substances are much influenced than solids and liquids by pressure. When the partial pressure of gas increases, the chance of its solubility is also increased. A soda bottle is an example of where CO2 is bottled under high pressure.

ANSWER

What is the iupac name of [co(NH3)4 H20 cl]

Posted by Shivam Thakur 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Utkarsh Trivedi 6 years, 6 months ago

First this complex should have +2 charge because Cl has -1 charge and H₂O and NH₃ has no charge. Tetraammineaquachloridocobalt(III) ion Note:ammine is used for NH₃ not amine.

Entertain Zone 6 years, 6 months ago

Tetraamineaquachloridocobalt(lll)

ANSWER

We often use sugar moiety in nucleic acid , what does this word" moiety" means?

Posted by ꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 6 months ago

it's nothing just it's a sugar molecule like nucleic acid. For example ➡️ when nucleoside is linked to phosphoric acid at 5' position of sugar moeity we get nucleotide.

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 6 months ago

To itni mat has mujhe irritation hota he jo bolo bas hasti he , koi answer line bhi to likh?

Yogita Ingle 6 years, 6 months ago

Moiety is a term that means a part or a portion. So sugar moiety means the sugar molecule in a compound (sugar portion of a complex molecule like nucleic acid). For example when we say that in DNA molecules, the sugar moiety is β-D-2-deoxyribose, it means that the sugar molecule is β-D-2-deoxyribose and describes the position of specific groups on the sugar molecule. Nucleic acids contain sugar molecules.

ANSWER

What is the molar concentration of a 300ml solution of ammonium sulfate containing 3.01x10^22 NH4+ ions????

Posted by Chintan Patel 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

150g of an unknown material was dissolve in 450 g of water. The resulting solution was found to be freeze at - 0.64°c. What is molar mass of material? (kf of water = 1.86 g/mol)

Posted by Aman Singh 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Chintan Patel 6 years, 6 months ago

Freezing point of solution=273k Therefore -0.64+273=272.36k Now finally 273-272.36=0.64k Now place all the values in formula for Elevation in boiling point

Chintan Patel 6 years, 6 months ago

Freezing point of solution=273k

ANSWER

What can be the topics for investigatory file in chemistry?

Posted by Manaswit Saini 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Gurman Kaur 6 years, 6 months ago

Drugs and medicine,polymers,analysis of cow milk, adulteration in milk and food

Akanksha Shrivastava 6 years, 6 months ago

You can easily find from google or last page of our chemistry practical book.

ANSWER

Does the questions come from description of syllabus only.. Like some of the topics are not mentioned in description of syllabus... So can I skip them or question will come?

Posted by Shyamli Shukla 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why is osmotic pressure most suitable colligative property for determine of molar masses of macro molecules over other properties

Posted by Vandana Garg 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Ritika Yadav 6 years, 6 months ago

In this method the temperature will beconstant and has less chance of change in molecular state(dissociation/association)

ANSWER

Let me know topics under '' biodegradable polymers'' for making project

Posted by Vatika Saxena 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is first order reaction

Posted by Ajay Chincholwad 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Sia ? 6 years, 6 months ago

A first-order reaction is a reaction that proceeds at a rate that depends linearly on only one reactant concentration.

Shyamli Shukla 6 years, 6 months ago

Reaction in which rate of the reaction is proportional to the first power of the concentration of the reactant is called first order reaction

ANSWER

Write two characteristic of solution which obeys raoults law at all concentration?

Posted by Aman Singh 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 6 years, 6 months ago

They follow Raoult’s Law. This implies that the partial pressure of components A and B in a solution will be P_A = P_A⁰ x_A and P_B = P_B⁰ x_{B .} P_A⁰ and P_B⁰ are respective vapour pressure in pure form. On the other hand, x_A and x_B are respective mole fractions of components A and B
The enthalpy of mixing of two components should be zero, that is, Δ_mix H = 0. This signifies that no heat is released or absorbed during mixing of two pure components to form an ideal solution