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

Sin81°

Posted by Vasu Jain (Feb 22, 2017 12:40 p.m.) (Question ID: 2441)

journal entry purchases return

Posted by Sugam Kapoor (Feb 22, 2017 11:49 a.m.) (Question ID: 2439)

give any two examples of current assets

Posted by Abhishek Jaat (Feb 22, 2017 8:32 a.m.) (Question ID: 2429)

• Stock

Cash

Answered by Riya Girdhar (Feb 22, 2017 9:12 a.m.)
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. (i) Give two industrial applications of distillation under reduced pressure. (ii) Why is it necessary to use acetic acid and not hydrochloric acid for acidification of sodium extract for testing sulphur by lead acetate test?

Posted by Slr Teja (Feb 22, 2017 7:25 a.m.) (Question ID: 2427)

• Ans. (i)Distillation Under Reduced Pressure is used for purifying or separating thermally unstable liquid compounds.

Uses :

• In Petroleum Refining
• in food processing

(ii) For testing of sulphur present in the organic compound, the Lassaigne’s extract is acidified with acetic acid (CH3COOH) and not sulphuric acid because lead acetate is soluble and does not interfere with the test. If sulphuric acid (H2SO4 ) is used, lead acetate will react with H2SO4 itself to form white ppt. PbSO4.

Answered by Naveen Sharma (Feb 22, 2017 12:01 p.m.)
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How many words with or without meaning can be formed from the letters of the word hcverma when 1) at least three consonants occupy the odd placed

Posted by Vivek Kumar (Feb 21, 2017 10:42 p.m.) (Question ID: 2419)

• Total arrangements possible are 7P7 = 7! = 5040

There are 2 vowels & 5 cosonants => there is only one way when the given condition will not meet & that is when both these vowels will occupy the odd places. Now, the no. of ways it is possible = 4P2 * 5P5 = 12 * 120 = 1440

=> Total words which can be formed in the required fashion are 5040-1440 = 3600 (Answer)

Answered by Manish Gandhi (Feb 22, 2017 12:55 p.m.)
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what are the differences between balance sheet and trial balance?

Posted by ajit mohanty (Feb 21, 2017 10:33 p.m.) (Question ID: 2418)

• Ans.  The differences are following:

1. Statement of debit and credit balances were taken from general ledger is known as Trial Balance. Statement of assets and equity & liabilities is known as Balance Sheet.
2. Trial Balance does not include closing stock while the Balance Sheet does not include opening stock.
3. Trial Balance checks the arithmetical accuracy in the recording and posting while balance sheet is prepared to determine the financial position of the company on a specific date
4. Trial Balance is prepared after posting into ledger whereas Balance Sheet is prepared after the preparation of Trading and Profit & Loss Account.
5. The Balance Sheet is the part of the Financial Statement while Trial Balance is not a part of the Financial Statement.
6. Balances of all personal, real and nominal account are shown in the trial balance. On the contrary, Balance sheet shows the balances of personal and real account only.
7. The trial balance is prepared at the end of each month, quarter, half year or the financial year. Conversely, the balance sheet is prepared at the end of each month.
8. The trial balance is prepared for internal use only, however, the balance sheet is prepared for both internal and external use, i.e. to inform outside parties about the financial condition of the entity.
Answered by Naveen Sharma (Feb 21, 2017 11:18 p.m.)
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Rhizosphera are pneumatophores or prop root?

Posted by Amrit Joseph (Feb 21, 2017 9:48 p.m.) (Question ID: 2413)

. Which species is the smallest aromatic substance?

Posted by Lokesh i47 (Feb 21, 2017 9:40 p.m.) (Question ID: 2411)

• The cyclopropenyl cation is the smallest aromatic substance.

As to π electrons, when n = 0, the ordinary cyclopropene molecule is not aromatic. It becomes aromatic only if the third π electron is missing. That is, when it becomes the cyclopropenyl cation and its ring has a positive charge.

Answered by Shweta Gulati (Feb 21, 2017 10:41 p.m.)
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Can water be bolied without boiling?

Posted by ishita bambhaniya (Feb 21, 2017 8 p.m.) (Question ID: 2406)

4tanx(1-tan2x)/1-6tan2x+tan4x

Posted by naveen ramdas (Feb 21, 2017 7:03 p.m.) (Question ID: 2405)

• The question is : Prove that tan 4x= 4 tanx(1-tan2x)/1-6tan2x+tan4x

L.H.S.

tan 4x = tan 2(2x)

[We know that tan 2x = 2 tan x / 1 - tan 2 x]

= 2 tan 2x / 1 - tan(2x)

[now putting tan 2x = 2 tan x / 1 - tan2x]

= 2[2 tan x/1-tan2x] / 1 - [2 tan x / 1 - tan2x] 2

=[4 tan x / 1 - tan x] / [1 - 4 tan x / (1 - tan2 x)2]

=[4 tan x / 1 - tan 2 x] / [ (1- tan 2 x)2 - 4 tan x / (1 - tan2 x)2]

= 4 tan x (1 - tan 2 x) / (1- tan 2 x)2 - 4 tan 2 x

= 4 tan x (1 - tan x) / 1 - 2 tan2 x +tan 4 x - 4tan2 x

= 4 tan x (1 - tan 2 x) / 1 - 6 tan 2 x + tan 4 x

Answered by Shweta Gulati (Feb 21, 2017 7:47 p.m.)
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What is vending machine

Posted by Umang Tiwari (Feb 20, 2017 9:29 p.m.) (Question ID: 2374)

• Ans.A Vending machine is a machine that dispenses items such as snacks, beverages, alcohol, cigarettes, lottery tickets to customers automatically, after the customer inserts currency or credit into the machine. The first modern vending machines were developed in England in the early 19th century and dispensed postcards

Answered by Naveen Sharma (Feb 20, 2017 11:06 p.m.)
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if |z|=1,z not equal to 1,  then find re(z-1/z+1)

Posted by Aishu Mouli (Feb 20, 2017 6:47 p.m.) (Question ID: 2367)

Physical education important question in Hindi

Posted by Sagir Ahmed (Feb 20, 2017 5:49 p.m.) (Question ID: 2364)

Discuss about the organizational setup of CBSE sports

Posted by Sweety Bouri (Feb 20, 2017 8:44 a.m.) (Question ID: 2350)

Explain the term physical Activity and Environment

Posted by Hemang Sharma (Feb 19, 2017 8:47 p.m.) (Question ID: 2342)

Discuss about the organizational setup of CBSE sports.

Posted by Hemang Sharma (Feb 19, 2017 8:45 p.m.) (Question ID: 2341)

What is anticoagulant

Posted by Sonu Chhabra (Feb 19, 2017 11:26 a.m.) (Question ID: 2325)

• Heparin is an anticoagulant

Answered by pranjal boora (Feb 21, 2017 9:47 a.m.)
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• The substances that prevents the coagulation of blood is called anticoagulant.it is used during surgery to prevent the blood clotting in blood vessels.

Answered by RAJENDRA SINGH (Feb 19, 2017 6:47 p.m.)
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Drive the formula for the magnitude of resultant of addition of two vectors

Posted by shubham yadav (Feb 19, 2017 7:11 a.m.) (Question ID: 2314)

• If two vectors are considered to be the adjacent sides of a Parallelogram, then the resultant of two vectors is given by the vector which is a diagonal passing through the point of contact of two vectors.

The proof for the resultant vector in Parallelogram addition is as follows,

Consider a parallelogram OABC as shown in the figure,

Let P&Q be two adjacent sides of parallelogram, and R be the resultant vector obtained by addition of vectors P&Q.

Now, drop a perpendicular from C on OA so that they meet at A

From right angled triangle ΔOCD,

OC2=OD2+DC2

And substituting A and B

R2=A2+B2+2A.Bcosθ

Answered by Shweta Gulati (Feb 20, 2017 1:24 a.m.)
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Explain me clearly  the  last  paragraph of father to  son

Posted by pranjal boora (Feb 18, 2017 10:21 p.m.) (Question ID: 2308)

• The last paragraph says that fathers and sons all over the world should learn to live on the same globe and same land. In the end, the father has a realization that he is the one who cannot understand himself and gets angry. The father concludes that each one of them is willing to forgive the other but neither wants to take the first step. Respecting each other’s differences is the only way out to diminish the distance between parents and children.

Answered by Shweta Gulati (Feb 19, 2017 12:02 a.m.)
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sin5x-2sin3x+sinx/cos5x-cosx=tanx

Posted by Khushi Garg (Feb 18, 2017 8:46 p.m.) (Question ID: 2300)

• sin5x + sinx = 2sin3x cos2x
cos5x - cosx = -2sin3x sin2x           ..... use factorisation formulae of trigonometry.
So the fraction is 2sin3x(cos2x-1)/ - 2sin3xsin2x
= (1- cos2x)/sin2x
= 2(sin2x)/ 2sinxcosx
=sinx/cosx
=tanx.

Answered by Shweta Gulati (Feb 20, 2017 1:27 a.m.)
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Correct errors in the following the sentences. a) He believed that all religions were one.b) He told me that he finished his work. C) I will crave for silence.

Posted by sneha raturi (Feb 18, 2017 6:33 p.m.) (Question ID: 2293)

• 1) He believed that all religions are one.

2) He told me that he has finished his work.

3) I crave for silence.

Hope this helps.

Answered by Shweta Gulati (Feb 19, 2017 12:07 a.m.)
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• 1. He believed that all religions was one.

2. He told me that he had finished his work.

3. I shall crave for silence.

Answered by Supriya Kumari (Feb 18, 2017 11:59 p.m.)
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What is capital expenditure and revenue expenditure

Posted by Abhishek Dora (Feb 18, 2017 8:53 a.m.) (Question ID: 2277)

• An expenditure which neither creates assets nor reduces liability is called Revenue Expenditure, e.g., salaries of employees, interest payment on past debt, subsidies, pension, etc.

An expenditure which either creates an asset (e.g., school building) or reduces liability (e.g., repayment of loan) is called capital expenditure.

Answered by Manish Gandhi (Feb 18, 2017 5:59 p.m.)
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Find the depth of the well if sound heard after 4sec.  of dropping the stone if speed of sound is 340m/sec.

Posted by Yash Choudhary (Feb 17, 2017 10:06 p.m.) (Question ID: 2269)

• Now total time taken to hear the sound after dropping the stone = 4sec

It is time between throwing and listening

therefore time for sound to go from depth to the height = 2sec

speed of sound= 340m/s

therefore depth = time * speed

=2*340

=680m

Answered by Devanshu Agarwal (Feb 17, 2017 10:20 p.m.)
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Calculate the value of G in British system

Posted by Yash Choudhary (Feb 17, 2017 9:59 p.m.) (Question ID: 2268)

write down the zeroth and first law of thermodynomics?

Posted by Kundan Pratap Singh (Feb 17, 2017 7:04 p.m.) (Question ID: 2257)

• Ans. The Zeroth Law of Thermodynamics states that if two bodies are each in thermal equilibrium with some third body, then they are also in equilibrium with each other.

The first law, also known as Law of Conservation of Energy states that energy cannot be created or destroyed in an isolated system.

Answered by Naveen Sharma (Feb 17, 2017 8:01 p.m.)
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IUPAC NAME OF CH3COCH2CH2CH2COOH

Posted by nilesh Kumar (Feb 17, 2017 4:33 p.m.) (Question ID: 2245)

• Ans. 5-oxohexanoic acid

Answered by Naveen Sharma (Feb 17, 2017 5:13 p.m.)
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Posted by Shakshi Sharma (Feb 16, 2017 8:15 p.m.) (Question ID: 2213)

• Ans. A business is an organization or enterprising entity engaged in commercial, industrial or professional activities.

A company transacts business activities through the production of a good, offering of a service or retailing of already manufactured products.

A business can be a for-profit entity or a nonprofit organization that operates to fulfill a charitable mission.

Answered by Naveen Sharma (Feb 17, 2017 12:37 a.m.)
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What is triple point water

Posted by Bhanupriya SAHU (Feb 16, 2017 6:40 p.m.) (Question ID: 2207)

• Ans. The particular temperature and pressure at which the solid, liquid, and gaseous phases of a given substance are all at equilibrium with one another is known as Triple Point Water.

Answered by Naveen Sharma (Feb 16, 2017 6:58 p.m.)
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What is relation between linear expansion or superficial expansion

Posted by Bhanupriya SAHU (Feb 16, 2017 6:39 p.m.) (Question ID: 2206)

• Ans. The amount by which unit length of a material increases when the temperature is raised by one degree is called the coefficient of linear expansion and is represented by $$\alpha$$ (Greek alpha).

The amount by which unit area of a material increases when the temperature is raised by one degree is called the coefficient of superficial (i.e. area) expansion and represented by $$\beta$$(Greek beta).

Relation b/w both :

$$\beta = 2 \alpha$$

Answered by Naveen Sharma (Feb 16, 2017 8:11 p.m.)
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A big drop is formed by collapsing 1000 small droplets of water.What will be the change in the surface energy. What will be the ratio between total Surface energy of droplets and surface energy of Big drop.

Posted by Aakash Pathania (Feb 16, 2017 6:17 p.m.) (Question ID: 2203)

• Ans. Let Radius of big Drop is R and Radius of Small Droplet is r.

Then

Volume of Big Drop = Volume of 1000 Small Droplets

=> $${4\over 3} \times {{\pi} } \times R^3 = {1000}{ \times }{4 \over 3 }{\times \pi \times r^3}$$

=> $$r = {1\over 10} \times R$$

The Surface Energy of 1000 Droplets = $$1000 [{T \times 4\pi r^2}]$$

=> $$1000 [{T \times 4 \pi ({R\over 10})^2}]$$

=> $$10 [T\times 4\pi R^2]$$     ......... (1)

The Surface Energy of Big Drop = $$T \times 4\pi R^2$$

Ratio of Surface energy :

$$10 [T\times 4\pi R^2] : [T\times 4\pi R^2] = 10:1$$

Surface Energy Decrease in This Case.

Answered by Naveen Sharma (Feb 16, 2017 6:44 p.m.)
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