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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 3 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Sia ? 3 years, 5 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

ANSWER

What is treshold frequency

Posted by Ibansabet Dohtdong 3 years, 5 months ago

Entrance Exam > NEET-UG > Physics

4 answers

Tamanna Soni 3 years, 2 months ago

Minimum frequency required for ejecting an electron from metal surface

Gracy Sharma 3 years, 4 months ago

It is the minimum frequency of photon required to eject an electron from the metal surface.

Vishu Bansal 3 years, 4 months ago

Xujxx

Tanya Maheshwari 3 years, 5 months ago

The minimum frequency required to excite electrons out of metal surface.

ANSWER

Explain haldane's effect?

Posted by Nishant Sharma 3 years, 5 months ago

Entrance Exam > NEET-UG > Biology

2 answers

Gracy Sharma 3 years, 4 months ago

It the dissociation of carbaminohaemoglobin in alveoli of lungs due to increase in the pO2 and decreased pCO2.

Tanya Maheshwari 3 years, 5 months ago

It is just opposite to Bohr's phenomena. Haldane effect encpurages Co2 exchange in both tissues and lungs. It is dissociation of Carbaminohaemoglobin due to increased O2 concentration.

ANSWER

Explain hamburger's phenomena?

Posted by Nishant Sharma 3 years, 5 months ago

Entrance Exam > NEET-UG > Biology

1 answers

Shrilekha Malick 3 years, 4 months ago

The chloride shift or Hamburger's phenomena describes the movement of chloride into RBCs which occurs when the buffer effects of deoxygenated haemoglobin increase the intracellular bicarbonate concentration, and the bicarbonate is exported from the RBC in exchange for chloride.

ANSWER

NEET MAI 12 CLASS KE DELETED CHAPTERS BHI AAYENGE ????

Posted by Aahana ❄❄ 3 years, 5 months ago

Entrance Exam > NEET-UG > Biology

5 answers

Nishant Sharma 3 years, 5 months ago

Organic chemistry ho gyi tumhari?

Nishant Sharma 3 years, 5 months ago

Good

Aahana ❄❄ 3 years, 5 months ago

Haan ho gaye

Nishant Sharma 3 years, 5 months ago

Jo aa rhe hain vo acche se ho gye!

Nishant Sharma 3 years, 5 months ago

Kyu nahi(except communication systems)

ANSWER

What is the last substrate to be used in respiration?

Posted by Amisha Aman 3 years, 5 months ago

Entrance Exam > NEET-UG > Biology

3 answers

Mayank Verma 3 years, 4 months ago

So the answer is 'Protein'.

Sagar Saini 3 years, 4 months ago

Acetyl coenzyme A

Nishant Sharma 3 years, 5 months ago

Proteins

ANSWER

How many no of seed are there in each fruit of maize

Posted by Aman Srivastava Srivastava 3 years, 6 months ago

Entrance Exam > NEET-UG > Biology

1 answers

Neha Keswani 3 years, 6 months ago

Hey! Here's is an answer to ur question according to me: Maize itself is madeup of a Seed 'KERNEL ' Hope it helps you!!

ANSWER

Collips hormone ke function ?????

Posted by Aahana ❄❄ 3 years, 6 months ago

Entrance Exam > NEET-UG > Biology

2 answers

Tanya Maheshwari 3 years, 5 months ago

Collip's hormone or parathormpne increases the blood calcium level and is antagonistic in function to thyrocalcitonin hormone.

Abhishek Kurmi 3 years, 6 months ago

Helps in maintaining blood calcium level along with calcitonin

ANSWER

What is difference between molality and molarity please explain??

Posted by Shweta Palwe 3 years, 6 months ago

Entrance Exam > NEET-UG > Chemistry

4 answers

Fatima Zohar 3 years, 5 months ago

Please

Fatima Zohar 3 years, 5 months ago

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

Fatima Zohar 3 years, 5 months ago

Hi

Radhika Chourey 3 years, 6 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.

ANSWER

Explain how homo erectus is direct ancestor of homo sapiens

Posted by Prity Kumari 3 years, 6 months ago

Entrance Exam > NEET-UG > Biology

0 answers

ANSWER

There are four identical metal plates each of area A. The plates are placed at equal distance d successively. If capacity is 4microF and a source of emf 10V is connected between x and y what is the charge on plate y and plate a?

Posted by Sarita Sharma 3 years, 6 months ago

Entrance Exam > NEET-UG > Physics

4 answers

Aayansh Meena 2 years, 10 months ago

सजणषढछडच_%*₹६?42मेरा फ़ोन नंबर है, +91…सजणमहणझभछमत़धदूदै,,??0358685688354665,जणब ीज्ञमfgucthv86?sFyzct7

Sandhya Rajput 3 years, 5 months ago

What is a home

Genita Irin 3 years, 4 months ago

4V

Aman Srivastava Srivastava 3 years, 6 months ago

40

ANSWER

Difference bw parthenogenesis and parthenocarpy

Posted by Prity Kumari 3 years, 6 months ago

Entrance Exam > NEET-UG > Biology

2 answers

Harshwardhan Shekhawat 3 years, 6 months ago

Parthenogenesis is the process which has the product named parthenocarpy (seedless) fruit.

Kajal Mandal 3 years, 6 months ago

Parthenogenesis means reproduction without fertilization And parthenocarpy means seedless fruits

ANSWER

Class

Posted by Sumit Bhai Nilesh Bhai Gamit Sumit Bhai Nilesh Bhai Gamit 3 years, 7 months ago

Entrance Exam > NEET-UG > Biology

2 answers

Ranjeet Katariya 3 years, 6 months ago

Remember taxonomic category as KDC OF GS

Ranjeet Katariya 3 years, 6 months ago

Class is a taxonomic category of biological classification

ANSWER

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

Posted by Pruthviraj Shirsath 3 years, 7 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Sia ? 3 years, 7 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}+)

ANSWER

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

Posted by Muskan Yadav 3 years, 7 months ago

Entrance Exam > NEET-UG > Chemistry

2 answers

Nishant Sharma 3 years, 5 months ago

Cyclopropene+

Anika Mukhtar 3 years, 6 months ago

Cyclopropene

ANSWER

Why do intensely lactating mothers not generally conceive ?

Posted by Nikhil Kumar Bisai 3 years, 8 months ago

Entrance Exam > NEET-UG > Biology

4 answers

Nishant Sharma 3 years, 5 months ago

Prolacting hormone is antagonistis to LH and Fsh which prevents maturation of follicles

Poovi Kins 3 years, 6 months ago

Due to negative feedback from the prolactin which suppresses the level of estrogen in the body

Chhatrapal Sijahata 3 years, 7 months ago

Suppression of gonadotropins

Gourav J 3 years, 8 months ago

Due to negative feedback mechanism

ANSWER

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

Posted by Little Legend 3 years, 8 months ago

Entrance Exam > NEET-UG > Chemistry

2 answers

Manju Jalal 3 years, 8 months ago

Please halp me

Harshada Mehetre 3 years, 8 months ago

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

ANSWER

What is ascomyctes

Posted by Rushikesh Gadekar 3 years, 7 months ago

Entrance Exam > NEET-UG > Biology

2 answers

Harini D 3 years, 7 months ago

A fungus whose spores develop within asci . They include most moulds, and yeasts, the fungal component of most lichens, and a few large forms such as morels and truffles.

Ranjeet Katariya 3 years, 6 months ago

Simply Phylum of kingdom Fungi.

ANSWER

Bhotnike

Posted by Krish Pandey 3 years, 9 months ago

Entrance Exam > NEET-UG > Chemistry

0 answers

ANSWER

A container is filled with 2d density of liquid and d density of liquid.Height of each liquid is h.in each liquid there is a hole at h÷2 height.first liquid velocity is v2 and the latter is v1.then find v1÷v2?

Posted by Mandira Baidya 3 years, 9 months ago

Entrance Exam > NEET-UG > Physics

0 answers

ANSWER

Why can't we see clearly through the fog ? Name the phenomenon responsible for it?

Posted by Tenzin Lhakpa 3 years, 9 months ago

Entrance Exam > NEET-UG > Physics

4 answers

Deepa Korishetti 2 years, 7 months ago

Hi

Genita Irin 3 years, 5 months ago

We can not see clearly through fog because the light is scattered by the droplets in the fog. The light is scattered by very small particles, this phenomenon is called Tyndall effect.

Ashwani Kumar Singh 3 years, 6 months ago

Because it is an colloidal solution........ and which is homogenous so it is not visible... ई थिंक know इट इस इज़ी फ़ॉर यू।।।।।

Rajan Kumar 3 years, 9 months ago

Tyndall effect

ANSWER

Hindi sahitye

Posted by Munsaf Ali 3 years, 10 months ago

Entrance Exam > NEET-UG > Physics

1 answers

Sia ? 3 years, 5 months ago

Please ask question with complete information.

ANSWER

Osmosis occur in

Posted by Absaar Mor 3 years, 10 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Ziya Rehaman 3 years, 10 months ago

Living cells only

ANSWER

NO FARMER NO FOOD NO FUTURE RESPECT FOR FARMERS

Posted by सत्य सनातन? 3 years, 10 months ago

Entrance Exam > NEET-UG > Physics

1 answers

Nishant Sharma 3 years, 5 months ago

Every profession is imp!

ANSWER

Hydrogen bomb is prepared by the fusion of ?

Posted by Vallavan Vaalu Payyan 3 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Sia ? 3 years, 5 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.

ANSWER

Please send me notes of digestion and absorption

Posted by Ananya Panda 3 years, 10 months ago

Entrance Exam > NEET-UG > Biology

3 answers

Ranjeet Katariya 3 years, 6 months ago

Digestion:- conversation of complex food substances in to the simple absorbable food substances. Absorption:- movement of simple absorbable food substances from lumen into the blood or lymph

Ranjeet Katariya 3 years, 6 months ago

Digestion is a process in which complex food substancea are broken down into the simple absorbable substances. It occurs by both mechanical ( by Masticacation through tooth) And by chemical (by enzymes) processes. ????and Absorption is the movement of simple absorbable substances from lumen into the blood or lymph and nothing more.. ???

Harini D 3 years, 7 months ago

Digestion : The process in alimentary canal by which the complex food is converted mechanically and biochemically into simple substances suitable for absorption and assimilation. Absorption : Absorption of digested food into blood or lymph and its use in the body cells for synthesis of complex components.

ANSWER

What are the Prop roots?

Posted by Omkumar Untwal 3 years, 10 months ago

Entrance Exam > NEET-UG > Biology

2 answers

Rajveer Kumar 3 years, 7 months ago

2)569(

Yogita Ingle 3 years, 10 months ago

Prop roots are adventitious roots in nature and are aerial roots also known as pillar roots. These thick aerial roots grow from horizontal branches and provide support like pillars. E.g. is Ficus bengalensis.

ANSWER

A plane glass slab is kept over various coloured letters which appeared least raised is 1 blue 2 violet 3 green 4 red

Posted by Vishal Yadav 3 years, 10 months ago

Entrance Exam > NEET-UG > Physics

1 answers

Dr. Ar🩺 3 years, 10 months ago

Red colour is least rise

ANSWER

1rad =?

Posted by Uday Gowda M 3 years, 11 months ago

Entrance Exam > NEET-UG > Physics

2 answers

Aditiya Kumar 3 years, 10 months ago

57.27 degree

Gaurav Seth 3 years, 11 months ago

The degree measure of 1 radian (taking π = (22 / 7)) is 57°16’22” (approx.)

π = radian = 180°

∴ 1 radian =	<center>180°</center>
π

=	<center>180 × 7°</center>
22

=		<center>630</center>	= 57	<center>3</center>	°
11	11

= 57°		<center>3</center>	× 60" = 57°	<center>180'</center>
11	11

= 57°16'

<center>4</center>

× 60" = 57°16'22"

ANSWER

What are antigens

Posted by Javed Khan 3 years, 11 months ago

Entrance Exam > NEET-UG > Biology

1 answers

Gaurav Seth 3 years, 11 months ago

Antigens are large molecules of proteins, present on the surface of the pathogen- such as bacteria, fungi viruses, and other foreign particles. When these harmful agents enter the body, it induces an immune response in the body for the production of antibodies.

For example: When a common cold virus enters the body, it causes the body to produce antibodies to prevent from getting sick.

ANSWER

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