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Recent questions tagged q152

The best vaccum so far attained in laboratory is $10^{-10}mm$ of Hg. How many molecules of gas remain per $cm^3$ at $20^{\large\circ}C$ in this vaccum?

asked Mar 26, 2014 by sharmaaparna1

1 answer

In Kjeldahl's method, nitrogen present is estimated as

asked Mar 4, 2014 by meena.p

1 answer

Find the length of common chord of the two circles $(x-p)^2+(y-q)^2=c^2$ and $(x-q)^2+(y-p)^2=c^2$.

asked Feb 12, 2014 by sreemathi.v

1 answer

What hydrogen like ion has the wavelength difference between the first lines of Balmer and Lyman series equal to 59.3 nm? $R_H = 109678 cm^{-1}$

asked Jan 31, 2014 by sharmaaparna1

1 answer

Sum of n terms of series $\;S=1^2+2(2)^2+3^2+2(4)^2+5^2+\;....\;$ when n is even is :

asked Jan 22, 2014 by yamini.v

1 answer

The function $f:R\{0\}\rightarrow R$ given by $f(x)=\large\frac{1}{x}-\frac{2}{e^{2x}-1}$ can be made continuous at $x=0$ by defining f(0) as

asked Jan 3, 2014 by sreemathi.v

1 answer

If $f'(x) =2x -3x^2$ and $f(0)=4; $ find $f(x)$=?

asked Dec 23, 2013 by meena.p

0 answers

What wil happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor ?

asked Dec 21, 2013 by thanvigandhi_1

1 answer

Which one of the following is not having two chiral centres ?

asked Nov 20, 2013 by thanvigandhi_1

0 answers

Assertion (A) : Cyclohexane is the most stable Cycloalkane. Reasons (R) : Cyclopropane and cyclobutane are less stable due to angle strain and torsional strain.

asked Nov 9, 2013 by thanvigandhi_1

0 answers

in the wave numbers of the first ( lowest ) two lines of a series of hydrogen atomic spectrum is $ 5331.7\: cm^{-1}$, they belong to the $(R_H = 109680\: cm^{-1}$)

asked Oct 24, 2013 by thanvigandhi_1

1 answer

In which of the following reactions , chlorine acts as an oxidizing agent ?

asked Oct 21, 2013 by meena.p

1 answer

The synthesis of crotonaldehyde from acetaldehyde is an example of .................. reaction.

asked Oct 15, 2013 by meena.p

1 answer

The total number of antibonding electrons in $N_2\: and \: O_2$ molecules respectively is :

asked Oct 14, 2013 by thanvigandhi_1

1 answer

Which one of the following pairs of 2,3- butane diol is enantiomeric?

asked Oct 2, 2013 by meena.p

1 answer

Carbylamine test is used to detect which one of the following?

asked Sep 25, 2013 by meena.p

0 answers

In which of the following properties, the two enantiomers of lactic acid differ from each other?

asked Sep 19, 2013 by meena.p

1 answer

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