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Recent questions tagged q130

Two separate bulbs contain gas A and gas B. The density of gas A is twice as that of B. The molecular mass of A is $\large\frac{1}{2}$ as that of B. If temperature is constant, the ratio of the pressure of A and B is :

asked Mar 5, 2014 by sharmaaparna1

1 answer

A compound with empirical formula $CH_2O$ has a vapour density of 30. Its molecular formula is

asked Mar 3, 2014 by meena.p

1 answer

Find the equation of circle passing through (0,0) and (0,B)?

asked Feb 11, 2014 by sreemathi.v

1 answer

$\displaystyle\sum_{r=1}^{n}\;\frac{r}{(r+1)!}=$

asked Jan 21, 2014 by yamini.v

1 answer

Calculate the uncertainty in velocity of an electron if the uncertainty in its position is of the order of $1A^{\large\circ}$

asked Jan 17, 2014 by sreemathi.v

1 answer

$\lim\limits_{n\to \infty}\bigg[\large\frac{1}{1-n^2}+\frac{2}{1-n^2}+..........+\frac{n}{1-n^2}\bigg]$ is

asked Jan 2, 2014 by sreemathi.v

1 answer

Integrate : $\int \large\frac{(a^x -b^x)}{a^x b^x}$$dx$

asked Dec 21, 2013 by meena.p

1 answer

The $ C_4$ plants are photosynthetically more efficient than $ C_3$ plants because :

asked Dec 20, 2013 by thanvigandhi_1

0 answers

If the solution of copper sulphate in which a copper rod is immersed, is diluted 100 times, what is the change in electrode potential ( Reduction ) ?

asked Nov 20, 2013 by thanvigandhi_1

1 answer

Which one of the following is an artificial sweetening agent ?

asked Nov 5, 2013 by thanvigandhi_1

1 answer

From the following dipole moment ( in Debye) values of methyl halides, identify the value of $CH_3 - F$.

asked Oct 21, 2013 by thanvigandhi_1

1 answer

$50\;ml$ of $H_2O$ is added to $50\;ml$ of $1 \times 10^{-3}\;M$ barium hydroxide solution. What is the pH of the resulting solution ?

asked Oct 21, 2013 by meena.p

1 answer

The type of bonds present in sulphuric anhydride :

asked Oct 15, 2013 by meena.p

1 answer

Which one of the following causes cancer?

asked Oct 13, 2013 by thanvigandhi_1

1 answer

At a certain temperature and at infinite dilution, the equivalent conductance of sodium benzoate, hydrochloric acid and sodium chloride are 240,349 and 229 $ohm^{-1} cm^2 equiv^{-1}$ respectively. The equivalent conductance of benzoic acid in $ohm^ {-1}\;cm^2\;equiv^{-1}$ at the same conditions is :

asked Oct 1, 2013 by meena.p

1 answer

The order of $pH$ of $0.200\;M$ solutions of $NH_4NO_3,Na_2CO_3$ is:

asked Sep 25, 2013 by meena.p

1 answer

During the electrolysis of copper sulphate aqueous solution using copper electrode, the reaction taking place at the cathode is :

asked Sep 19, 2013 by meena.p

0 answers

A random variable $X$ has the following p.d.f\[\]$ \begin{array} {llllllll} \textbf{X:}& 0& 1& 2& 3& 4& 5&6&7 \\ \textbf{P(X):}& 0& k &2k& 2k& 3k& k^{2}&2k^{2}&7k^{2}+k \end{array} $\[\]The value of $k$ is

asked May 28, 2013 by poojasapani_1

1 answer

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