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Recent questions tagged q157

A gas at $0^{\large\circ}C$ and 1 atm pressure occupies 2.5 litre . What change in temperature would be necessary if the pressure is to be adjusted to 1.5 atm and the gas has been transferred to a 2.0 litre container?

asked Mar 29, 2014 by sharmaaparna1

1 answer

A is a lighter phenol and B is an aromatic carboxylic acid. separation of a mixture of A and B can be carried out easily by using a solution of

asked Mar 4, 2014 by meena.p

1 answer

A certain dye absorbs light of $\lambda = 4530 A^{\large\circ}$ and then fluorescence light of $5080 \;A^{\large\circ}$ Assuming that under given conditions $47\%$ of the absorbed energy is re-emmited out as fluorescence, Calculate the ratio of Quantum emitted out to the no. of quanta absorbed

asked Feb 1, 2014 by sharmaaparna1

1 answer

For $\;n \in N \;n \geq 25$ , Let A.G.H be A.M ,G.M and H.M of 25 and n . what is the least value of n such that A.G.H are all natural numbers greater than 25 .

asked Jan 22, 2014 by yamini.v

1 answer

Let $f(x)=[x]\sin\bigg[\large\frac{\pi}{[x+1]}\bigg]$ where [.] denotes the greatest integer function. The domain of $f$ is and the point of discontinuity of $f$ in the domain are

asked Jan 3, 2014 by sreemathi.v

1 answer

Integrate : $\int \large\frac{7}{9} x^{3/2} \tan ^5 (x^{5/2}) \sec^2 (x^{5/2}).dx$

asked Dec 24, 2013 by meena.p

1 answer

In humans, blood passes from the post caval to the diastolic right atrium of heart due to :

asked Dec 21, 2013 by thanvigandhi_1

0 answers

What are A,B and C in the following reactions ?

asked Nov 20, 2013 by thanvigandhi_1

0 answers

In which of the following pairs, the central atoms have the same number of lone pairs of electrons ?

asked Nov 9, 2013 by thanvigandhi_1

1 answer

Which one of the following gases has the same RMS velocity at $ 27^{\circ}C$ as that of $N_2$ with RMS velocity of $ 5.0 \times 10^4\: cm.s^{-1}$ at $ 7^{\circ}C$?

asked Oct 24, 2013 by thanvigandhi_1

1 answer

The structure of the compound formed, when nitrobenzene is reduced by lithium aluminium hydride $(LiA / H_4)$ is

asked Oct 22, 2013 by meena.p

1 answer

The concentration of an organic compound in chloroform is $6.15$g per $100\;mL$ of solution. A portion of this solution in a $5\;cm$ polarimeter tube causes an observed rotation of $-1.2^{\circ}.$ What is the specific rotation of the compound ?

asked Oct 16, 2013 by meena.p

1 answer

A certain quantity of electricity is passed through aqueous $AI_2\: (SO_4)_3\: and \: CuSO_4$ solutions connected in series. 0.09 g of $AI$ is deposited on cathode during electrolysis. The amount of copper deposited on cathode in grams is :

asked Oct 14, 2013 by thanvigandhi_1

1 answer

Reduction of nitrobenzene with $Z_n$ and alcoholic $KOH$ solution results in the formation of the following compound:

asked Oct 2, 2013 by meena.p

1 answer

If the uncertainty in velocities of two particles A and B with mass $1.0 \times 10^{-27}\;kg$ and $1.0 \times 10^{-31}\;kg$ respectively is the same , the ratio of uncertainty in the positions of A and B is :

asked Sep 25, 2013 by meena.p

1 answer

Identify $X$and $Y$ in the following reactions:

asked Sep 19, 2013 by meena.p

1 answer

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