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An alpha particle has no electrons as it is equivalent to a helium atom that has lost its two electrons. It just has two protons and two neutrons (since mass no. of helium is 4). So the option having an ion with 4 electrons will be the answer.

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Student Life 9 months ago

Are there options ?

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Oxidation state of [Ag(NH3)2][Ag(CN)2]

Posted by Thejus Jyo 9 months, 4 weeks ago

Entrance Exam > NEET-UG > Chemistry

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Yashi Kushwaha 1 month, 1 week ago

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Abhishek Verma 9 months, 2 weeks ago

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Apple

Posted by Aayansh Meena 1 year ago

Entrance Exam > NEET-UG > Chemistry

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In liebig's method of estimation how many grams of co2 will be formed from 60g of acetic acid.

Posted by Ananya S Nair 1 year, 1 month ago

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Is SiCl4 an e- deficient species ?

Posted by Tirtha Unde 1 year, 2 months ago

Entrance Exam > NEET-UG > Chemistry

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Structure of human eye

Posted by Sahil Abass 1 year, 2 months ago

Entrance Exam > NEET-UG > Chemistry

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Sahil Abass 8 months, 2 weeks ago

Sfddvhhf

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Sahil Abass 1 year, 2 months ago

Structure of human eye

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I go to school ____ foot

Posted by Manoj Jain 1 year, 3 months ago

Entrance Exam > NEET-UG > Chemistry

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लोगों ने राजा से क्या प्रार्थना की

Posted by Mable C J 1 year, 4 months ago

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Most stable carbocation among the following : 1. +CH2-C6H5-NO2 2. +CH2-C6H5-Cl 3. +CH2-C6H5-CH2CH3 4. +CH2-C6H5-CH3

Posted by Durga Rajeev 1 year, 5 months ago

Entrance Exam > NEET-UG > Chemistry

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Akash Jangid 1 month, 2 weeks ago

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ch3coo)2mn+ethane in presence of oxygen

Posted by Bazi Mol 1 year, 6 months ago

Entrance Exam > NEET-UG > Chemistry

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Santosh Kumar Goswami 1 year, 2 months ago

Fakhhsthq

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A hydro carbon contains 85.7 percent carbon if 42 mili g of compound contains 3.01×10²⁰ molecules what is the molecular formula

Posted by Grishma Barde 1 year, 7 months ago

Entrance Exam > NEET-UG > Chemistry

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Sia ? 1 year, 7 months ago

First, assume the hydrocarbon is CxHy. Find the Mr, so that we can find the value of x. With Mr and x, we can find the value of y. So the molecular formula of the hydricarbon compund is C⁶H¹².
Remember some formulas:
n = m/Mr
molecules = n x 6.02 x 10²³
Mr = molecular mass
Ar = atomic mass. Ar C = 12, Ar H = 1

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What is difference between molality and molarity please explain??

Posted by Shweta Palwe 1 year, 8 months ago

Entrance Exam > NEET-UG > Chemistry

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Fatima Zohar 1 year, 8 months ago

Please

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Fatima Zohar 1 year, 8 months ago

Question puchna hai mujhe aapse question Kiya hai English ka aap batayenge koi aisa number 33 ka photo click chahie 5th standard

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Fatima Zohar 1 year, 8 months ago

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Radhika Chourey 1 year, 8 months ago

MolarityMolality 1. The number of moles of solute present in per liter of solution.1. The number of moles of solute present in 1kg of solvent. 2. It depends on volume.2. It depends on mass. 3. Volume changes with temperature, hence it is temperature dependent.3. It depends on mass which is independent of temperature. To convert Molality value into Molarity value, we have to use the following formula:- m=1000×(d−M)×Mb1000×M or, M=(m×Mb)+1d where, M: molarity, m: molality, d: density, Mb: Molecular mass.

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what is inductive effect? explain +I and -I with suitable example.

Posted by Pruthviraj Shirsath 1 year, 10 months ago

Entrance Exam > NEET-UG > Chemistry

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Sia ? 1 year, 10 months ago

Inductive effect in simple terms is the result of permanet dipole produced due to polarity of the sigma bond developed due to difference in electronegativity.
This causes a permanent state of bond polarization, where the more electronegative atom has a slight negative charge ({tex}\delta{/tex}-) and the other atom has a slight positive charge ({tex}\delta{/tex}+)

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The most stable carbocation amongst the following is Ch2=CH-CH2 , CH3-CH2-CH2^+ , cyclo propene ^+

Posted by Muskan Yadav 1 year, 10 months ago

Entrance Exam > NEET-UG > Chemistry

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Nishant Sharma 1 year, 8 months ago

Cyclopropene+

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Anika Mukhtar 1 year, 8 months ago

Cyclopropene

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What is meant by fertilisation ? List the steps acording to formation of embryo

Posted by Little Legend 1 year, 11 months ago

Entrance Exam > NEET-UG > Chemistry

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Manju Jalal 1 year, 10 months ago

Please halp me

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Harshada Mehetre 1 year, 11 months ago

Steps- 1.gametogenesis 2.insemination 3.fertilisation 4.clevage

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Harshada Mehetre 1 year, 11 months ago

Fertilisation is fusion of haploid sperm and haploid ovum to form diploid zygote.

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Bhotnike

Posted by Krish Pandey 1 year, 11 months ago

Entrance Exam > NEET-UG > Chemistry

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Osmosis occur in

Posted by Absaar Mor 2 years ago

Entrance Exam > NEET-UG > Chemistry

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Ziya Rehaman 2 years ago

Living cells only

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Hydrogen bomb is prepared by the fusion of ?

Posted by Vallavan Vaalu Payyan 1 year, 8 months ago

Entrance Exam > NEET-UG > Chemistry

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Sia ? 1 year, 8 months ago

The energy released by fusion is three to four times greater than the energy released by fission, giving the "hydrogen" bomb, or H-bomb, more power. The name comes from the fact that it uses a fusion of tritium and deuterium, hydrogen isotopes.

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Room temperature in kelvin scale

Posted by Krishna Chander 2 years, 2 months ago

Entrance Exam > NEET-UG > Chemistry

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Harshada Mehetre 1 year, 11 months ago

298K

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Ziya Rehaman 2 years ago

(K-273)/100=C/100=(F-32)/180 So, (K-273)/100=25/100=(F-32)/180 => K= 298 => F= 77

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Gaurav Seth 2 years, 2 months ago

The normal room temperature which would be comfortable for living is around 20 - 25° C.

In chemistry, The upper limit 25°C is taken as Standard room temperature .

We know that,
Temperature on Celsius + 273 = Temperature on Kelvin.

Now,
25°C = 25 + 273 = 298K .

Therefore, The standard room temperature in Kelvin is 298 k

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Mendeele recorganised the signifinace of

Posted by Ahsu Ahsu 2 years, 3 months ago

Entrance Exam > NEET-UG > Chemistry

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Saksham Hi Ij Arora Ji O 2 years, 3 months ago

Man 7 soul mon2 9

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What are the total number of groups in a periodic table

Posted by Sufy Sufy 2 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

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Aastha Gupta 2 years, 5 months ago

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Pankaj Patil 2 years, 5 months ago

18 group

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Avneesh Kumar 2 years, 5 months ago

18 groups

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Dhanshri Bedre 2 years, 5 months ago

18 group

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Yogita Ingle 2 years, 5 months ago

In the periodic table, there are 7 periods and 18 groups.

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Explain hypotonic and hypertonic sol

Posted by Fara Khan 2 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

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Gaurav Seth 2 years, 5 months ago

Isotonic Solution:

If the medium surrounding the cell is of exactly the same water concentration as inside the cell, there will be no net movement of water across membrane resulting in no change in size of cell. Such solution is called Isotonic solution.

(iii) Hypertonic solution:

If the medium surrounding the cell has a lower water concentration than inside the cell, i.e., if the solution is highly concentrated, then the cell will lose water through osmosis. Such concentrated solution is called Hypertonic solution.

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