Students and Teachers Forum

Use this formula to find the value of h and later, l and b. Now use the formula that, Area = 2( lb + bh +hl) to find the total surface area of the .....

You may know that, Surface Area of Cuboid = 2( lb +bh + hl) Here, length(l), breadth(b) and Area(A) is given. You can find 'h' from this .....

Assume the rate of depriciation as 'R%' So, You may know that, Amount after depriciation(A) = P( 1 - R/100)T Here, A, P and T are given. You can use this to find the .....

When trichloromethane is heated with silver dust acetylene is formed as CHCl3 + 6Ag +CHCl3--------------> C2H2 + .....

CHCl3        +      conc.HNO3-------------> (Cl)3C-NO2 trichloromethane                                         .....

Chloroform is stored in dark brown bottles to avoid sunlight because in the presence of sunlight and oxygen it form phosgene which is poisonous gas. CHCl3        +    O2      ---------->   .....

2CH3Cl + 2Na-------->CH3-CH3 + 2NaCl                         dry ether CH3-CH3 + CH3Cl + Na--------> CH3CH2CH3 +NaCl CH3CH2CH3 + Cl2---------> CH3CH2CH2Cl       .....

When 2-propanol is refluxed with red phosphrous and iodine 2- iodoalkane is formed. R-CHOH-R +P4+I2---->R2CH-I 2-propanol                       .....

CH3CH2OH + HI -------------->CH3CH2CH2I  + H2O ethanol                                         iodoethane when ethanol is allowed to reacts .....

Oxidation of methane with iodine is carried out in the prsence of oxidizing agents because iodination of methane is reversible reaction hence oxidizing agents are used to oxidise HI formed during the reaction to iodine and hence the .....

The possible isomer of C4H9Br are 1. .....

CH3CHBrCH2CH3---------->(X)CH3CH2=CH2CH3----------->(Y)2CH3CHO + H2O2 2-bromobutane           -HBr             but-2-ene                   O3 .....

They can be inter converted as 1. 1-bromopropane to 2-bromopropane  CH3CH2CH2Br   -------------->CH3CH=CH2 + HBr 1-bromopropane      alc.KOH           .....

Grignard's reagent is the (alkyl or aryl magnesium halides) famous reagent in organic compound for the syntheis of many  compound it was discovered by Grignard as below. R-X + Mg----------------> R-Mg-X  + HX alkyl or aryl halide .....

The conversion can be achieve as a. bromoethane------>ethoxyethane 2CH3CH2Br + Ag2O-----------> CH3CH2-O-CH2CH3 + 2AgBr bromoethane                               .....

This reaction is known as Wurtz reaction in which alkyl halide is heated with sodium metal in the presence of dry ether to form higher alkane. Eg.       R-X + 2Na + X-R--------------> R-R + 2NaX         .....

You might have known what is taxis? Taxis is movement of whole organism in reponse to stimuli. Well photo means light. Phototaxis is the movement of animal in response to light. For example: Earthworm moves away from light. This is an example .....

Many pesticides are non-biodegradable. Thus they start accumulating in bodies of animals that consume it. Accumulation of DDT in body of birds leads to breakage of egsshells. In human and other animals, organochlorine pesticides causes brain .....

Ducks are amphibians. They live in water as well as land. They show only few aquatic adaptation. They are very good swimmers. They have webbed toes for swimming. Their beak is broad and flat. Thus suitable for straining food materials. They .....

Contamination may also caused by deposition of metal metals like lead. They causes lung and liver cancer, renal damage, brain damage, etc. Excessive nitrate in drinking water causes fatal diseases in infants. Excessive flouride causes painful .....

Wildlife are the animals and birds living in their own habitat. They are very important for the balance in the ecosystem. We all know they attract tourist. Hence, helps in tourism and improes the economic condition of the country. These days we .....

Wildlife are the animals and birds living in their own habitat. They are very important for the balance in the ecosystem. We all know they attract tourist. Hence, helps in tourism and improes the economic condition of the country. These days we .....

They have well developed flight muscles. Their bones are hollow and spongy to reduce weight. They do not have teeth, urinary bladder, fused vertebrae. They have only left .....

An aquatic animal is an animal either which lives in water for most or all of its life. They may be vertebrate or invertebrate. Two adaptational features of aquatic animals are: We all have seen fishes. So, what are the features .....

We have been destroying the balance in the nature. That is why we have to conserve nature. Conservation basically means management of earth's resources. Conservation needs an objective to maintain balance in environment and human .....

What is taxis? Taxis means movement of organism in response to stimuli. Thigmotaxis is movement of whole organism in response to touch. You might have seen animals showing response to touch. For example: When we touch earthworm, it shrinks its .....

Pollutants are those substances which bring undesirable changes in environment. These causes health hazards. Pollutants is a substance (dust,smoke), chemical (SO2 ,CO2, etc) or factors (heat, noise) that causes pollution. Pollutants are .....

Earthworms try to stay out of sunlight because the heat from the sun dries out their skin. If an earthworm's skin becomes too dry, it wouldn't be able to breath, and it would die. The red light's more like a cloudy day to the .....

The typhosole starts from 26th segment to 25th segment. It increases the absorptive area of intestine. And thus helps in absorption of digested .....

Cocoon is a gelatinous, .....

Porifera is named under two word 'pori' means pores and 'fera' means bearing. Porifera are organisms that bears .....

Some peculiar characters of Mollusca are: 1. It is the second largest phylum after arthropoda. 2. Its body consists of head, visceral mass, foot and mantle etc. 3. There is a presence of radula in buccal mass. 4. There is a presence of .....

At first modification of .....

After the elongation, macronucleus divides by amitosis. And micronucleus divides by mitosis. After the division of nucleus body of organism also gets constricted. Then, the organism divides into two daughter paramecia. Between the two paramecia, .....

In divergent evolution, organisms have same ancestors. But they have modified characters. It is due to adaptation and variation. Whereas, in convergent evolution organisms have different ancestors. But they possess similar characters due to .....

The largest species of Archaeopteryx could grow to about 0.5 m (1 ft 8 in) in length. They are small in size. It has broad wings, and inferred ability to fly or glide. Archaeopteryx had more in common with other .....

Unlike sterilization, pasteurization is not intended to kill all microorganisms in the food. Instead, it aims to reduce the number of viable pathogens. So they are unlikely to cause .....

While anthropology deals with the study of origin and development of organism. It also deals with cultural, social condition and customs of races of human. It deals with the past and present of .....

As we know,  Force, F = Mass* acceleration                =Mass*v/t               =Mass*s/t2               F=  [M .....

e.g. An asset costing 100000 has 10 years of useful life. Depreciation will be 100000/10 = 10000 If salvage value is 10000 Depreciation = (100000-10000)/10 = .....

For the first transaction, it involves capital and cash and .....

Like in the first transaction commenced business: Bank is an asset. When business is commenced with bank, bank balance is increased. Also capital of the company gets increased. Thus the equation will be as: 59,00,000(bank) = 59,00,000(capital) + .....

For the first transaction, it involves capital and .....

For the first transaction, it involves capital and .....

For the first transaction, it involves capital and .....

Incomes increase the cash balance  on assets side and also increases the amount of capital. Expenses decrease the cash balance  on assets side and also decreases the amount of .....

e.g. journal for first transaction is: Purchase a/c -Dr 40,000 Furniture a/c -Dr 30,000 Cash a/c -Dr 9,00,000 To capital a/c .....

We develop this into a paragraph, talking about attitudes and reactions. For example: ................is so pathetic that suddenly I change my decision. He is really humble to his employee and what I like about him is he is flexible to employees .....

If somebody says today I walked 5km then it is not vector because the statement doesnt tell the answer of second question.  Such statement is .....

But you told me just now you had.............  Mention what he had done.  You can also make as .............you would fast .....