CBSE > Class 11 > Chemistry | CBSE Board | Homework Help

Use formula - {lambda = h / mv} mass of e- = 9.1 × 10*-31 and mass of p+ =1.6 × 10*-27 since mass of e- is less the wavelength of e- will be more since they both are inversely proportinal amd when you divide it cones 1836 hence your answer !

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Riya Rana 5 years, 7 months ago

Ans is 1. :-- 1836:1

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Law of multiple proportion??

Posted by Akhil? . 5 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

? ????? ?????? ? 5 years, 7 months ago

Mention not ❌...

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Akhil? . 5 years, 7 months ago

Thanks... ??

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? ????? ?????? ? 5 years, 7 months ago

The law of multiple proportions states that if two elements form more than one compound between them, then the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers......

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What is the wave number of the radiation of lowest frequency in the lyman series of spectrum of li2+ ion

Posted by Tanashree Vimalan 5 years, 7 months ago

CBSE > Class 11 > Chemistry

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At what atomic number would a transition from n=2 to n=1 energy level result in emission of photon of wavelength = 3×10^-8

Posted by Tanashree Vimalan 5 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 7 months ago

The Reidberg wavelength formulae:
1/ 3.8×10⁻⁸ =109678(1−1/4)×Z²
Z²=405
Z = 20

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Differentiation between Pesticides and insecticide ??????

Posted by Kavyanjali Singh 5 years, 7 months ago

CBSE > Class 11 > Chemistry

5 answers

Akhil? . 5 years, 7 months ago

???

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Kavyanjali Singh 5 years, 7 months ago

Yup dude??????

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Akhil? . 5 years, 7 months ago

My pleasure ??

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Kavyanjali Singh 5 years, 7 months ago

Thnx dude?

1Thank You

Akhil? . 5 years, 7 months ago

Pesticides are the chemicals which is used to destroy pests..
Insecticides are the chemical which is used to kill insects.. ??

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i want to become a bank manager or professor(teacher) so i should choose commerece but i like physics and chemistry also ,so what sould i do .please tell me

Posted by Rajinder Rana 5 years, 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Rajinder Rana 5 years, 7 months ago

which one is best??

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Girish Chandra 5 years, 7 months ago

U can choose any stream

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ANSWER

What is social media??

Posted by ꧁༺★King K. Tyagi Ji}★༺꧂ ??? 5 years, 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Drip ? Drop? 5 years, 7 months ago

In which place we share our opinion to every body and connect with people of any where and a huge network ?

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Dark ..? 5 years, 7 months ago

Bigadne ki chij(bachoo ko )

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List uses of things...

Posted by Royal Thakur 5 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Pk . 5 years, 7 months ago

Green zone....bhai.....yeah sure.....good ?

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List 10 uses of chemistry???

Posted by Royal Thakur 5 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Aanchal Bodh 5 years, 7 months ago

I will tell you, in prepartion of acids,medicines,alcohols,etc yar u cannot find this in google wasting time here

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What is antibiotics??

Posted by ꧁༺★King K. Tyagi Ji}★༺꧂ ??? 5 years, 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Aanchal Bodh 5 years, 7 months ago

Antibiotics are certain medicines which are produced from penicillium so far as i know you can search in google it is better not to waste time here

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Dhruv .. 5 years, 7 months ago

How r u spending ur LOCKDOWN...i am being bored of studying and social media??

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What is atoms??

Posted by ꧁༺★King K. Tyagi Ji}★༺꧂ ??? 5 years, 7 months ago

CBSE > Class 11 > Chemistry

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Explanation of Planck's Quantum Theory.

Posted by Nikita Vats 5 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 7 months ago

Planck’s quantum theory:

According to this theory:

Energy emitted or absorbed is not continuous, but is in the form of packets called quanta .In terms of light it is called as photon.
Each photon carries an energy which is directly proportional to the frequency of wavelength i.e. E depends upon v (nu).
1. Or E=hv (where v is frequency)
2. Value of h =6.634 x 10^-34Jsec
Energy associated with no of packets is given by:

E=nhv (where n is an integral multiple)

This formula can also be written as:

E = (nhc)/ (λ)

(Because we know frequency=speed of light/wavelength)

V = (c/ λ)

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How to find oxidants and reductants

Posted by Durga Devi Sigdel 5 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Meghna Thapar 5 years, 7 months ago

Oxidant is a substance that has the ability to oxidize other substances , to cause them to lose electrons. Thus, in the reaction, the reductant or reducing agent loses electrons and is oxidized, and the oxidant or oxidizing agent gains electrons and is reduced.So to identify an oxidizing agent, simply look at the oxidation number of an atom before and after the reaction. If the oxidation number is greater in the product, then it lost electrons and the substance was oxidized. If the oxidation number is less, then it gained electrons and was reduced.

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What is philosophers stone and elixer of life?

Posted by Aadi Verma 5 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Sahil Don 5 years, 7 months ago

Mazaak

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Scope in science?? ?

Posted by Royal Thakur 5 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

Royal Thakur 5 years, 7 months ago

Hii ??...

0Thank You

Royal Thakur 5 years, 7 months ago

Thanks

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Nawal Kishore Jha 5 years, 7 months ago

Science have more scopes aiims ,biologist , doctry,

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What is liquid??

Posted by ꧁༺★King K. Tyagi Ji}★༺꧂ ??? 5 years, 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Dhruv .. 5 years, 7 months ago

Its a state of matter.

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Pk . 5 years, 7 months ago

A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure.

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No.of neutrons present in 1.73g of Ammonia is?

Posted by Mangal Singh 5 years, 7 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is solid??

Posted by ꧁༺★King K. Tyagi Ji}★༺꧂ ??? 5 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Pk . 5 years, 7 months ago

SOLID is an acronym that stands for five basic principles of Object-Oriented Programming and design to fix STUPID code: Single Responsibility Principle. Open/Closed Principle

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Can I get video of chemistry in hindi

Posted by Shivani Pandey 5 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Carry Minati 5 years, 7 months ago

YouTube

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What is the main difference between accuracy and precision in measurement?

Posted by Priyanshu Sharma 5 years, 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Priyanshu Sharma 5 years, 7 months ago

,thanks

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Yogita Ingle 5 years, 7 months ago

<center>Accuracy </center>	<center>Precision</center>
Accuracy refers to the level of agreement between the actual measurement and the absolute measurement.	Precision implies the level of variation that lies in the values of several measurements of the same factor.
Represents how closely the results agree with the standard value	Represents how closely results agree with one another
Single factor or measurement	Multiple measurements or factors are needed
It is possible for a measurement to be accurate on occasion as a fluke. For a measurement to be consistently accurate, it should also be precise.	Results can be precise without being accurate. Alternatively, the results can be precise and accurate.