Ask questions which are clear, concise and easy to understand.

what is nodule formation

Posted by Justin Jagwar (Jan 17, 2017) (Question ID: 1434)

• The rhizobia resides inside the root and divides to form nodule.This rhizobia forms ammonia which helps to form nucleotides and amino acids in plants.

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• Once the rhizobia are inside the root cells, the root cells divide rapidly, forming a nodule. The rhizobia create ammonia from nitrogen in the air, which is used by the plant to create amino acids and nucleotides. The plant provides the bacteria with sugars

Answered by Naveen Sharma (Jan 17, 2017)
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Position of an object at a particular time-diplacement or distance?

Posted by Rishav Sharma (Jan 17, 2017) (Question ID: 1432)

• And. It's displacement

Answered by Naveen Sharma (Jan 17, 2017)
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When is the initial velocity taken negative

Posted by Rishav Sharma (Jan 17, 2017) (Question ID: 1430)

• if I started from A and go to B in a direction and then returned back to A and go in a direction opposite to N then my velocity is -ve with respect to N.

Answered by Naveen Sharma (Jan 17, 2017)
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• A vector points in a direction in space. A negative vector (or more precisely "the negative of a vector") simply points the opposite way.

If I drive from my home to my workplace (and then defining my positive direction in that way), then my velocity is positive if I go to work, but negative when I go homefrom work. It is all about direction seen from how I defined my positive axis.

Answered by Naveen Sharma (Jan 17, 2017)
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What is the reason behind frictional force between layers of fluids?

Posted by Diksha Jha (Jan 17, 2017) (Question ID: 1428)

• Ans. It is due to the internal frictional force that develops between different layers of fluids as they are forced to move relative to each other.

Answered by Payal Singh (Jan 17, 2017)
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• The reason behind frictional force between layers of fluids:

i) intermolecular force of cohesion
(ii) molecular momentum exchange

Answered by Naveen Sharma (Jan 17, 2017)
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How can you explain higher stability of BCl3 as compared to TlCl3

Posted by Shadab Mahmood (Jan 17, 2017) (Question ID: 1423)

• Both boron and thallium belong to group 13 of the periodic table. Boron does not show inert pair effect as it does not have d or f electrons. As we go down the group, the shielding effect of the electrons also decrease therefore the increased nuclear charge down the group is not neutralized by the poor shielding effect of the electrons in the inner orbitals.Due to this the inert pair effect becomes more and more predominant and the s electrons of the valency shell experiences strong attraction .This effect is maximum in thallium and therefore only the 6p1 electrons take part in the bond formation. This makes +1 oxidation state most stable in case of thallium. Therefore TlCl is stable and TlCl3 is unstable. In case of BCl3 , boron does not have d or f orbital , so all the valence electron in the 2s and 2p orbital takes part in the bond formation making BCl3 stable.

Answered by Naveen Sharma (Jan 17, 2017)
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What is the difference between stress and strain?

Posted by Gracy Singh (Jan 17, 2017) (Question ID: 1420)

1. Stress is defined as a force that can cause a change in an object or a physical body while strain is the change in the form or shape of the object or physical body on which stress is applied.
2. Stress can occur without strain, but strain cannot occur with the absence of stress.
3. Stress can be measured and has a unit of measure while strain does not have any unit and, therefore, cannot be measured.
4. Strain is an object’s response to stress while stress is the force that can cause strain in an object
Answered by Naveen Sharma (Jan 17, 2017)
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What is the procedure for the formation of the company. Explain in brief.

Posted by Ritik Sharma (Jan 16, 2017) (Question ID: 1403)

• The whole process of company formation can be divided into four stages as given below

1. Promotion of a Company
2. Registration of a Company
3. Certificate of Incorporation; and
Answered by Naveen Sharma (Jan 16, 2017)
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What is importance of plasma proteins

Posted by Anas Ansari (Jan 16, 2017) (Question ID: 1402)

• The proteins present in the plasma of human blood are a mixture of simple proteins, glycoproteins, lipoproteins and other conjugated proteins are called “Plasma Proteins“. These may be separated by salt precipitation, immunological technique and electrophoresis.

Functions of Plasma Protern :

1. Protein Nutrition: Plasma proteins act as a source of protein for the tissues, whenever the need arises
2. Osmotic Pressure and water balance: Plasma proteins exert an osmotic pressure of about 25 mm of Hg and therefore play an important role in maintaining a proper water balance between the tissues and blood. Plasma albumin is mainly responsible for this function due to its low molecular weight and quantitative dominance over other proteins.
3. Buffering action: Plasma proteins help in maintaining the pH of the body by acting asampholytes. At normal blood pH they act as acids and accept captions.
4. Transport of Lipids: One of the most important functions of plasma proteins us to transport lipids and lipid soluble substances in the body.
5. Transport of other substances: In addition to lipids, plasma proteins also transport several metals and other substances α2-Globulins transport copper (Ceruloplasmin), bound hemoglobin (haptoglobin) and thyroxine (glycoprotein) and non-heme iron is transported by transferrin present in β-globulin fraction. Calcium, Magnesium, some drugs and dyes and several cations and anions are transported by plasma albumin.
6. Blood Coagulation: Prothrombin present in α2-globulin fraction and fibrinogen, participate in the blood clotting process as follows.
Answered by Naveen Sharma (Jan 16, 2017)
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What is the active mass of water

Posted by Sajal Jain (Jan 15, 2017) (Question ID: 1376)

• Active mass is defined as the molar concentration ie. number of Gram-moles per litre

Active mass for pure liquids and solids is Always taken 1.

if not pure water then
For water,
density = 1 g/mL = 1000 g/L
Molar mass = 18.015 g/mol

so

1000 g/L = (1000 g/L)/(18.015 g/mol) = 55.51 mol/L

Answered by Naveen Sharma (Jan 15, 2017)
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Posted by Amit Singha (Jan 14, 2017) (Question ID: 1355)

• GDR have foreign exchange risk i.e. currency of issuer is different from currency of GDR.

Answered by Naveen Sharma (Jan 14, 2017)
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Nacl is soluble in water and insoluble in petrol why?

Posted by Udit Vaibhav (Jan 13, 2017) (Question ID: 1350)

• Just remember that like dissolves like. The same way, polar dissolves polar compounds. In this case, NaCl is polar so it gets dissolved in water(which we know is also polar). On the other hand, petroleum is a non polar compound, Therefore, NaCl does not dissolve in it.

Answered by yakshith k (Jan 15, 2017)
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• Sodium chloride is an ionic molecule. There exists electronegativity difference between Sodium and Chlorine, which gives polarity to the molecule. Thus sodium chloride is polar molecule.

Generally polar molecules will soluble in polar solvents and insoluble in non-polar solvents. Non-polar molecules will soluble in non-polar solvents and insoluble in polar solvents.

As sodium chloride is polar molecule it will be soluble in polar solvents like water. And insoluble in petrol (as it is non-polar solvent).

Answered by Naveen Sharma (Jan 13, 2017)
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Do c3 cycle occurs both in day time and night time

Posted by Rajnish Singh (Jan 13, 2017) (Question ID: 1337)

• Despite its widespread names (both light-independent and dark reactions), these reactions do not occur in the dark or at night.

Answered by Naveen Sharma (Jan 13, 2017)
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Why lithium halides are somewhat covalent?

Posted by Bikash Adhikari (Jan 13, 2017) (Question ID: 1336)

• We know that, electronegative nature decreases down the group, so Li will have higher electronegative character than other elements of the group, and also it has very small size the lithium halides become covalent in nature.

It is because, the small size of Li+ cation will have the maximum tendency to withdraw electrons from anions and so it polarizes the bond and in this process, it distorts the electron clouds of anions which neutralizes some of the charge, and their increases a covalent character.

The Fajan's rule explains that smaller the size of atom higher will be polarizing capacity and so the covalent character will be larger.

So the Lithium halides become partially covalent in nature.

Answered by Naveen Sharma (Jan 13, 2017)
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What ie photoelectric effect

Posted by Rajnish Singh (Jan 12, 2017) (Question ID: 1305)

• Under the right circumstances light can be used to push electrons, freeing them from the surface of a solid. This process is called the photoelectric effect (or photoelectric emission or photoemission), a material that can exhibit this phenomena is said to be photoemissive, and the ejected electrons are called photoelectrons; but there is nothing that would distinguish them from other electrons. All electrons are identical to one another in mass, charge, spin, and magnetic moment.

Answered by Payal Singh (Jan 12, 2017)
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• The photoelectric effect or photoemission is the production of electrons or other free carriers when light is shone onto a material. Electrons emitted in this manner can be called photoelectrons.

Answered by Naveen Sharma (Jan 12, 2017)
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The pressure of an ideal gas filled in the bulb of a constant volume gas thermometer at 7degree Celsius is 60cm of mercury.what will be the pressure of the same volume of gas at 147 degree Celsius

Posted by sheshul sharma (Jan 11, 2017) (Question ID: 1293)

• $P\alpha T$

Therfore, $\frac{{P}_{1}}{{T}_{1}}=\frac{{P}_{2}}{{T}_{2}}$

Substitute the initial and final values and find out the unknown component.

Answered by yakshith k (Jan 15, 2017)
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What is infrastructure

Posted by Akshit Jain (Jan 10, 2017) (Question ID: 1262)

• Infrastructure refers to structures, systems, and facilities serving the economy of a business, industry, country, city, town, or area, including the services and facilities necessary for its economy to function.

Answered by Naveen Sharma (Jan 10, 2017)
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• Infrastructure is the basic physical systems of a business or nation; transportation, communication, sewage, water and electric systems are all examples of infrastructure. These systems tend to be high-cost investments; however, they are vital to a country's economic development and prosperity. Projects related to infrastructure improvements may be funded publicly, privately or through Public-private partnerships

Answered by Payal Singh (Jan 10, 2017)
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Differentiate between right and claim.

Posted by Kiman Gurung (Jan 09, 2017) (Question ID: 1233)

• Right is that which complies with justice, law or reason. For e.g.: Right to equality, Tight to Life & Liberty etc. Whereas, Claim is a demand of ownership made for something. For e.g.: Individual claim, Joint Claim etc.

Answered by Manish Gandhi (Jan 10, 2017)
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1. Rights are primarily those state-recognised claims that every individual regards to be necessary for leading a life of respect and dignity. These are essentially a justified claim or an entitlement.
2. Rights are important as they help individuals to develop their capacity to reason, develop their skills and enable them to make informed choices in life.

The bases on which claims to rights can be made are:

1. The representation of conditions that individuals collectively see as a source of self-respect and dignity.
2. The necessity for every individual’s well being
Answered by Naveen Sharma (Jan 10, 2017)
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The propagation of sound is an adiabatic process i.e. the temperature keep changing is it mean that velocity of sound also keeps on changing?

Posted by anika monga (Jan 09, 2017) (Question ID: 1225)

Why did Roman emperors never get rid of senate

Posted by Vrusha Shah (Jan 09, 2017) (Question ID: 1203)

It is given that roots of x2+px+q= 0 are real.show that both roots are real negative, if and only if p>0;q>0.

Posted by raja raj (Jan 09, 2017) (Question ID: 1201)

Why is Ga smaller in size than Al?

Posted by Hitesh Saini (Jan 07, 2017) (Question ID: 1130)

• The size of Ga is sampler than Al due to poor screening effect .The electrons in 3d of Ga are occupied ,they have poor screening effect and hence less influence to decrease effective nuclear charge .Therefore electrons in Ga experience more force of attraction than Al resulting in decrease in size.

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Find domain and range of f(x)=-x

Posted by SHIVENDU SHEKHAR (Jan 06, 2017) (Question ID: 1123)

• $Domain=R$

$Range=R$

Answered by Neeraj Sharma (Jan 14, 2017)
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Chemiosmotic hypothesis mein ATP bante hai vo vahi hai Jo photoionization of chlorophyll mein ATP bante hai ya alag hai

Posted by Tarun singal (Jan 06, 2017) (Question ID: 1108)

Name the return given to debenture holders for using their funds ?

Posted by Richa Aggarwal (Jan 06, 2017) (Question ID: 1106)

• Interest on debenture

Answered by Shivi Singhal (Jan 06, 2017)
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2x-3/3x-7>0

Posted by SOURAV kamboj (Jan 06, 2017) (Question ID: 1105)

• $\frac{2x-3}{3x-7}>0$

$⇒x>\frac{7}{3}$

$Case-2$

$⇒x<\frac{3}{2}$

Answered by Neeraj Sharma (Jan 14, 2017)
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what is liberalisation

Posted by Niyati Bansal (Jan 06, 2017) (Question ID: 1104)

• <div style="clear:both;">Meaning: - Liberalisation is the process of liberating the economy from various regulatory and control mechanisms of the state and of giving greater freedom to private enterprise.</div> <div> </div> <div> </div> <div>Definition: - Liberalisation can be defined as, “Unilateral or multilateral reductions in tariffs and other measures that restrict trade”</div> <div> </div> <div>NEED FOR LIBERALISATION</div> <div> </div>
• Bring flexibility in the operations of business organisations.
• Paves the way for globalisation
• Helps companies to compete with other companies at international level.
• Saves time, efforts and money of business enterprises.
• reduces cost of production and distribution

Increase efficiency, productivity and profitability of business organisations.

Answered by Vikrant Singh (Jan 07, 2017)
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• Reduction of unnecessary management and control

Answered by Shivi Singhal (Jan 06, 2017)
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• Removing all unnecessary restrictions and control is known as liberalization

Answered by Richa Aggarwal (Jan 06, 2017)
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how hydrogen is different from halogens?

Posted by Muskan Goyal (Jan 04, 2017) (Question ID: 1063)

• Hydrogen is the lightest element having atomic mass 1 while halogens are group of elements that includes F, Cl, Br, I etc. Hydrogen acts as both electropositive and electronegative element but halogens are hightly electronegative in nature.

Answered by RAJENDRA SINGH (Jan 04, 2017)
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Why does the colour of NaCl chage into blue whe we add some lemon juice?

Posted by Kirtti RANJAN MISHRA (Jan 03, 2017) (Question ID: 1054)

A flywheel of moment of inertia 10^7 g cm^2 is rotating at a speed of 120 rotations per minute. Find the constant breaking torque required to stop the wheel in 5 rotaions?

Posted by Keshav Varshney (Jan 02, 2017) (Question ID: 1009)

Why the salts of superoxides are coloured?

Posted by Bibhu Mukhopadhyay (Jan 01, 2017) (Question ID: 979)

• They are coloured because of paramagnetic nature of the compound O2-.

According to molecular orbital theory it has an unpaired electron hence it is paramagnetism.

Answered by Devanshu Agarwal (Jan 01, 2017)
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