Here, compound A is obtained by reacting nitrobenzene with Sn/HCl, A must be Aniline. Compound B is obtained by treating aniline with NaNO2 and HCl, leads to the formation of benzenediazonium chloride. Compound C is obtained by .....

First nitrobenzene reduced to aniline in acidic medium (Zn/HCl). Then aniline couples with benzenediazonium chloride to give p-aminoazobenzene (orange red dye).                     Zn/HCl Ph-NO2 + .....

It is due to the resonance of -NO2 group which withdraw electron from benzene ring that creates electron deficient at ortho and para position and meta position is little bit more electron rich centre for a electrophile to attack at meta .....

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Nitro compounds mainly shows reduction reaction. Different reduction reaction takes place in different medium. Nitroalkane undergoes complete reduction reaction with active metals like Zn, Sn etc in presence of conc. HCl to gives primary .....

If the product of living organisms is used as a fuel, it is called as biomass fuel. Examples are straws, wood, animal dung cakes etc. Sources of fuel such as wood can be directly burned. Bio-gas can be obtained by simple processing of animal .....

हामीले दैनिक प्रयोग गर्ने काठ, धान-बाली, कृषिजन्य फोहोर, र अन्य जैविक वस्तुहरू नै बायोमास हुन् .....

Based on the mechanisms involved and time taken for the reaction, hypersensitivity reactions can be divided into four types: type I, type II, type III and type .....

The vaccine is made by disease producing microorganisms. It is modified by killing or attenuating these organisms. So that it will not cause disease. And also helps in formation of antibodies on inoculation into the .....

Antibody are the blood proteins. They are also called immunoglobin.  Immunoglobulin is a large, Y-shaped protein produced mainly by plasma cells. It is used by the immune system to neutralize pathogens such as .....

Immunoglobin(Ig) is a group of structurally related blood proteins. They function as antibody. Examples are :  IgA, IgD, IgE, IgG and .....

After this, the fourth cleavage occurs with two vertical divisions.

They appear perpendicular to each other and results in 16 celled stage.

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Mechanism of spermatogenesis:

Here, multiple mitotic division of sperm mother cell ( 2n number of chromosome) occurs.

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 The wool insulates(wrap) the ice to prevent absorption of heat either by radiation, conduction, or convection.  Wet or dry, natural wool is a good thermal .....

In Latin, ‘morum’ means ‘mulberry’.

The random division of 32 celled, leads to formation of ball like structure known as ‘morula’.

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Epiboly:

This is the first step of granulation.

The outgrowth of micromeres takes place as it divides and redivides.

Here, micromeres move and .....

Sperm consists of three parts- the head, middle piece and tail.

Head consists of anterior cap like structure known as acrosome.

Acrosome secretes enzyme known as ‘spermlysin’ which dissolves plasma membrane of ovum .....

4. Fibrocyte: They are generally small in size. They are star shaped cells. They help in producing fibres. 5. Pigment cells: They are small and spindle shaped cells. They provide specific colour to the .....

Exocrine glands are ducted glands. These glands secrete juices to epithelial surface. Their secretion takes place through duct. Example: tear gland, salivary gland, mammary glands, .....

3. Compound saccular glands: These glands are compound in structure. They are further branched. They are found in mammary glands, sublingual and submandibular salivary .....

Let us talk about the first type of compound squamous epithelium.   1. Keratinised stratified epithelium:  These tissue has dead cells on the uppermost layer. It also has deposition of protein called 'keratin' which makes the .....

Simple cuboidal is a type of simple epithelial tissue.   Simple Cuboidal .....

The traditional pattern of conducting election is on the verge of being replaced by electronic system. All the people in Nepal are not computer literate so they may not be able to use it properly. Frequent technical problems can be encountered on .....

एक एक गर्दै प्रश्न गर्नुहोस् त .....

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एक एक गर्दै प्रश्न गर्नुहोस् त .....

एक एक गर्दै प्रश्न सोध्नुहोस् त .....

पारिजातको जन्म दार्जिलिङको लिंगीय चिया कमानमा  वि।सं। १९९४ बैशाख महिनामा भएको .....

एक एक गर्दै प्रश्न सोध्नुहोस् त .....

कथा लेख्न सजिलो होस् भन्नका लागि>  बुँदाहरु दिइन्छ ।   बुँदाका आधारमा  कथा लेख्दाखेरी .....

You know that the system fails when it is not in the favour of people. Causes of the failure of the Panchayat System were:

यो प्रसङ्ग भाग््य कथामा प्रयुक्त पुन्टेको बाबाले आफु गरीब हुनुको कारण आफुसँग जग्गा नहुनु हो .....

देश  मुलुक पर्वत  पहाड, शैल  ध्वनि आवाज विपत्ति  आपत् विशाल ठुलो  वृक्ष  पलासी .....

Consider a market where there is only one firm that is producing only one type of product. There are no other firms which produce the similar kind of product. Here, the producer determines the price of that product. And moreover earns maximum .....

According to Ricardo, rent can be determined under two conditions: 1. Extensive cultivation 2. Intensive .....

Do you know what does interest mean? Your parents may have gone to bank for saving certain amount of their monthly income. Bank gives them certain percentage of interest on the principal amount. This is called as the saving interest. Lets say .....

Don't you think rapid deforestration is the main cause of environmental degradation? What about the increasing number of vehicles that has increased the level of sound pollution and air pollution? Doesn't this affect the health of all .....

Go through the report published by the Nepal Electicity Authority (via internet) "A Year in Review - Fiscal Year 2015/16" You will find out about the major hydropower projects ongoing in Nepal at .....

Debt-equity ratio is the ratio which measures the relative proportion  of debt and equity in financing the assets of a firm. Its computed using the formula: Debt-equity ratio = Long term debt / Shareholders .....

Direct cost can be conveniently identified with a particular unit of cost. Indirect costs are not conveniently  identified with a particular .....

Under centralized purchasing, all materials are purchased by  purchase department. Under decentralized purchasing, the materials are purchased by the respective departments. Centralized purchasing is cheaper Decentralized purchasing is .....

Some of the responsibilities are: a. Avoiding damages to goods b. Providing security against loss, fire, accident etc. c. Performing checking function on work completed. d. Recording and receiving of materials in store. e. Avoiding deterioration of .....

For 1 unit it takes 12 mins For 40 units it takes 12 X 40 mins = 480 mins i.e. 6 hrs. Wage payable per day = 6 hrs X Rs. 20 per hr = Rs. .....

Total working hrs in a week  = 6 X 6 = 36 hrs. Total units in a week = 36 hrs X 12 = 432 units Total wages in a week = 432 units X Rs. 5/ unit = Rs. .....

Premium refers to something received above par. When debetures are issued at premium, the co. receives money more than issued at par e.g. par value =10 premium =10% then co. receives Rs.1 more.

Regarding journal for issue; Amount .....

Discount refers to something received above par. When debetures are issued at discount, the co. receives money less than issued at par e.g. par value =10 discount =10% then co. receives Rs.1 less.   

Regarding journal for .....

Financial statements are the summary reports  of a company's financial transactions. They report the end results of accounting  activities during a given period of time. Its objectives are: To provide financial information to .....

The preference shares, which can be redeemed or repaid after the expiry of a  fixed period or after giving the prescribed notice as desired by the company, are known as  redeemable preference shares. Those preference shares, which cannot .....

Generally, a company doesn't issue  its entire authorized capital to the public for subscription. So, issued capital is a part of authorized capital, which is offered to the public for subscription including shares to the vendor for .....

Productivity refers to the rate of output per unit of input. Higher output with less input means higher productivity. Lower output with more input means lower productivity. In Nepal, though most of the people are agriculture based, we are facing .....