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A solution containing 8g of a substance in 100g of dimethyl ether boils at 36.86 °c wheres pure ether boils at 35.60°c determine the molecular mass of solute.

Posted by Gitanjali Keshri 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Concentrated HCL has a density of 1.3 g/cc (85% by mass) . Calculate its molarity

Posted by Rishab Sharma 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How we classify condensation polymer on basis of repeating structural units?

Posted by Sandeep Yadav 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Machenism of cumene process

Posted by Shubham Jha 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What are antihistamines

Posted by Akshat Arora 8 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Prachi K 8 years, 2 months ago

Brompheniramine act as antihistamine.. It interfere with the natural action of histamine by competing with histamine for binding site of receptor where histamine exert its effect

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Please tell me the best website from which I could get all the viva ques related to practicals??

Posted by Sahil Rana 8 years, 2 months ago

CBSE > Class 12 > Chemistry

4 answers

Sahil Rana 8 years, 2 months ago

No comments for u mr jb???and thkss for ur advice???

1Thank You

Sahil Rana 8 years, 2 months ago

Thanks vineet??

1Thank You

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 8 years, 2 months ago

P0£NHUB.COM Best for practical??

2Thank You

Vineit Kumar Gupta 8 years, 2 months ago

scribid

1Thank You

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Name of reactions

Posted by Jhanwi Singh 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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Aldehydes are more reactivethan ketone towards nucleophilic addition reactn ? Why

Posted by Shivani Chhokar 8 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Sakshi Kumari 8 years, 2 months ago

In ketones the carbonyl group is attached to two methyl group while in aldehyde it is attached to one alkyl group the + I inductive effect of the alkyl group decreases electron deficient the carbonyl group and increases stearic hindrance to the attacking nucleophile .therefore aldehydes are more reactive than ketones.

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Lekha Raj 8 years, 2 months ago

It has already been mentioned in chemistry ncert book.

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Water of crystalization experiment

Posted by Anish Thakur 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why is the bond angle in PH3 is lesser than that in NH3 malecule

Posted by Devesh Kumar 8 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Chhavi Verma 8 years, 2 months ago

Drago's rule

0Thank You

Bhumi Jain 8 years, 2 months ago

That's why bond angle in PH3 is lesser than NH3

0Thank You

Bhumi Jain 8 years, 2 months ago

In NH3 Since the central atom is more Electronegetive , it attracts the shared paired of electrons. But when the three pair of electrons approach the Nitrogen atom they experience a strong repulsion due to electron - electron repulsion force

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Please tell me some type of viva questions

Posted by Kajal Bhardwaj 8 years, 2 months ago

CBSE > Class 12 > Chemistry

10 answers

Kajal Bhardwaj 8 years, 2 months ago

Thank you

1Thank You

Lekha Raj 8 years, 2 months ago

Wlcme

0Thank You

Aastha Singh 8 years, 2 months ago

Thanks Lekha Raj

0Thank You

Lekha Raj 8 years, 2 months ago

?????

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Bhumi Jain 8 years, 2 months ago

Thnk U soooo much Lekha Raj

1Thank You

Lekha Raj 8 years, 2 months ago

These were some of the question in my own chem prcticl.

1Thank You

Lekha Raj 8 years, 2 months ago

What is the formula for Nesselers reagent, Schiffs base,Fehlings reagent and Tollens reagent

3Thank You

Lekha Raj 8 years, 2 months ago

Explain ring test for carbohydrates.

3Thank You

Lekha Raj 8 years, 2 months ago

What is froth floatation?

3Thank You

Lekha Raj 8 years, 2 months ago

Why we use only neutral FeCl3 for the test of accetate? Why not basic or acidic FeCl3?

4Thank You

ANSWER

What is the difference b/w Charging nd discharging ?

Posted by K Genius 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What are azotropic mixtures

Posted by Sandeep Yadav 8 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Muskaan Sharma 8 years, 2 months ago

The mixture of two liquids having same composition in liquid as well as vapour phase in the solution and boil at constant temp.

1Thank You

Vijeta Kanwar 8 years, 2 months ago

The mixture of two liquids which boils at same temperature.

3Thank You

ANSWER

Account for the foll. Transition metal show variable oxidation state

Posted by Nitin Giri 8 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Rashi Bari 8 years, 2 months ago

Since (n-1)d and ns orbitals have comparable energies so that they both can enter into chemical bond formation,transition metals show variable oxidation state

3Thank You

ANSWER

Hey better sample paper for chemistry

Posted by Shivanshu Yadav 8 years, 2 months ago

CBSE > Class 12 > Chemistry

9 answers

Shivanshu Yadav 8 years, 2 months ago

Hy sweety ji

1Thank You

Aisha Grewal 8 years, 2 months ago

Hey shivanshu u join again.. Welcome back

1Thank You

Shivanshu Yadav 8 years, 2 months ago

Thnx friends

1Thank You

Prachi K 8 years, 2 months ago

Arihant sample paper is the best almost all teacher recommend this book..don't listen to others

1Thank You

Aisha Grewal 8 years, 2 months ago

No oooooo. Arihant is not so typical

1Thank You

Pranjali Mahajan 8 years, 2 months ago

Not arihant our ma'am told that don't refer it because its solutions are all given with respect to values Out of syllabus bhi questions daal rakhe hai Hard hai vo as compared to board papers

0Thank You

Aisha Grewal 8 years, 2 months ago

Hii.... Arihant or Ead sample papers. ☺️☺️☺️☺️☺️☺️☺️

1Thank You

Nisha Beniwal 8 years, 2 months ago

Arihant

1Thank You

Harsh Rajput 8 years, 2 months ago

all are fool here like you

4Thank You

ANSWER

Is chemical kinetics important chapter

Posted by Abhishek Singh 8 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Pranjali Mahajan 8 years, 2 months ago

U can't even take risk to leave one chapter also

0Thank You

Rashi Bari 8 years, 2 months ago

Same topics like rate law and its expression, diff bw order and molecularity are sure to come. For numerical ncert back exercise n examples are enough.

0Thank You

Lekha Raj 8 years, 2 months ago

All ch r imp

1Thank You

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Distinguished test of organic chemistry can you help me please give me PDF of it

Posted by Hariom Shakya 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why half time reaction does not depend on intial concentration of first order reaction

Posted by Ansh Raj 8 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Pranjali Mahajan 8 years, 2 months ago

See thalf=0.693/k Isme Kahi par bhi concentration nahi aa raha so it is independent of concentration

0Thank You

ANSWER

Cummene is starting material for preparatin of phenol why?

Posted by Garima Singh 8 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Siddharth Basu 8 years, 2 months ago

As formation of cumene hydro peroxide leads to reduced into phenol

2Thank You

Aisha Grewal 8 years, 2 months ago

Oxidation of cumene gives acetone as by product.. Which is used as chemical in industries

2Thank You

ANSWER

If I study the first 3ch. Of chem from my school notes and and solve the sample paper will it be sufficient for those 3chs : solid state , Sol. , electrochemistry

Posted by Tia Chaubey 8 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Prachi K 8 years, 2 months ago

Enough h

1Thank You

Tia Chaubey 8 years, 2 months ago

As per board point of view

2Thank You

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To prepare 250ml of m/20 of oxalic acid experiment

Posted by Saurabh Tiwary 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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How to deal with organic chem

Posted by Shwetank Pathak 8 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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What are chiral compounds?

Posted by Vivek Saini 8 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

A Siri 8 years, 2 months ago

Chiral compound are the compound whose image was not superimposible

2Thank You

ANSWER

What is the formula of sodium nitroprusside?

Posted by Lekha Raj 8 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Prachi K 8 years, 2 months ago

Jab pata h ki galat h to puch kyu rhi ho...over smartness

0Thank You

Lekha Raj 8 years, 2 months ago

It's wrong

0Thank You

Shabader Raj 8 years, 2 months ago

Sa cr2

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ANSWER

(CH3)3C-CHO does not undergo aldol condensation. Why

Posted by Abhishek Choudhary 8 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Lekha Raj 8 years, 2 months ago

Good attempt Dhruv

1Thank You

Riddhi Patel 8 years, 2 months ago

(CH3)3C-CHO does not undergo aldol condensation because it does not contain any alpha hydrogen.

2Thank You

ANSWER

can a raction have zero activation enegy? explain with reason.

Posted by Sangeeta Rathore 8 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Lekha Raj 8 years, 2 months ago

No.It is bcoz zero activation energy is exist only in ideal cases..........No reactions are ofcourse ideal........

2Thank You

ANSWER

Please someone tell me the formula of Sodium Nitroprusside............

Posted by Lekha Raj 8 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Siddharth Basu 8 years, 2 months ago

Na4Fe[(CN)6(NOS)]

2Thank You

ANSWER

Define the term 'amorphous ' give a few examples of amorphous solid.

Posted by Deepak Rajbhar 8 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Chinmay Nanda 8 years, 2 months ago

Amorphous solids are such which don't have shiny appearance.

0Thank You

Lekha Raj 8 years, 2 months ago

Amorphous solid are those solid which does not have any definite structure.These are anisotropic and their configuration is of long range order.They do not have any sharp melting point .These solid when cut through a sharp edge tool...we get two amorphous solid of rough surface.EXAMPLE:' glass quartz'.

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Is universe following the law of conservation of energy

Posted by Vish Al 8 years, 2 months ago

CBSE > Class 12 > Chemistry