Recent questions tagged class11

Which of the following is correct order for the stability of the divalent cations

asked Mar 5, 2014 by sreemathi.v

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Hydrogenation of the below compound in the presence of poisoned palladium catalyst gives,

asked Mar 5, 2014 by meena.p

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Which of the following is a polar solvent

asked Mar 5, 2014 by sreemathi.v

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Bond order is directly proportional to

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Which of the following compound has wrong IUPAC name ?

asked Mar 5, 2014 by meena.p

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The number of lone pairs in $XeF_2$

asked Mar 5, 2014 by sreemathi.v

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A flask containing 12g of a gas of relative molecular mass 120 at a pressure of 100 atm , was evacuated by means of a pump untill the pressure was 0.01 atm at the same T. Which of the following is the best estimate of the number of molecules left in the flask. $(N_0 = 6\times10^{23} mol^{-1}$)

asked Mar 5, 2014 by sharmaaparna1

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If $V_0$ is the volume of the given mass of a gas at 273K and pressure P , then according to Charles's law the volume of same mass of gas at $10^{\large\circ}C$ and pressure P will be

asked Mar 5, 2014 by sharmaaparna1

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The geometry and bond angles of $IF_7$ respectively

asked Mar 5, 2014 by sreemathi.v

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A quantity of hydrogen gas occupies a volume of 30.0mL at a certain temperature and pressure. What volume of half of this mass of hydrogen occupy at triple the absolute temperature if the pressure were one-ninth the original gas?

asked Mar 5, 2014 by sharmaaparna1

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The hybridisation of $XeOF_4$ molecule is

asked Mar 5, 2014 by sreemathi.v

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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

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The hybridisation and geometry of $SO_4^{2-}$ respectively

asked Mar 5, 2014 by sreemathi.v

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4.0g of argon has pressure P at temperature T K in a vessel . On keeping the sample at $50^{\large\circ}C$ higher temperature 0.8g gas was given out to maintain the pressure P. The original temperature was:

asked Mar 5, 2014 by sharmaaparna1

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The carbon- carbon length in benzene is :

asked Mar 5, 2014 by meena.p

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The shape of the $NO_3^-$ ion is

asked Mar 5, 2014 by sreemathi.v

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Which of the following has zero dipole moment ?

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The value of universal gas constant R depends on..

asked Mar 5, 2014 by sharmaaparna1

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Which of the following is the correct order of bond angle

asked Mar 5, 2014 by sreemathi.v

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Increasing order of basic nature of $NH_3(I), CH_3NH_2(II) $ and -NH_2(III)( $ is

asked Mar 5, 2014 by meena.p

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One mole of an ideal monoatomic gas is mixed with 1 mole of an ideal diatomic gas. The molar specific heat of the mixture at constant volume is.

asked Mar 5, 2014 by sharmaaparna1

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The non-polar molecule is

asked Mar 5, 2014 by sreemathi.v

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The most stable free radical among the following is

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Meso-Tartaric acid is optically inactive due to the presence of

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If one mole of a monoatomic gas ($\gamma = \large\frac{5}{3}$) is mixed with one mole of a diatomic gas ($\gamma = \large\frac{7}{5}$) . The value of V for the mixture is :

asked Mar 5, 2014 by sharmaaparna1

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In Lassaigne's test for nitrogen , the blue colour is due to the formation of

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$CO_2$ is isostructural with

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The molecule that does not possess a permanent dipole moment is

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The number of $\sigma$ and $\pi$ bonds are in $CO_2$ molecules

asked Mar 5, 2014 by sreemathi.v

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Among the following molecules,the shortest bond length is to be found in

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The IUPAC name of

asked Mar 4, 2014 by meena.p

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Refer the below diagram : The IUPAC name of the compound is

asked Mar 4, 2014 by meena.p

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The correct name of below diagram is:

asked Mar 4, 2014 by meena.p

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Find the value of $n$ so that $\large\frac{a^{n+1}+b^{n+1}}{a^n+b^n}$ may be the geometric mean between $a$ and $b$.

asked Mar 4, 2014 by rvidyagovindarajan_1

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An alkane with the formula $C_6H_{14}$ can be prepared by the hydrogenation of only two alkenes $(C_6 H_{12})$. IUPAC name of the alkane is :

asked Mar 4, 2014 by meena.p

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Which of the following does not show tautomerism ?

asked Mar 4, 2014 by meena.p

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The number of electron(s) in the $\sigma 2p$ molecular orbital in $N_2^{2+}$ is/are

asked Mar 4, 2014 by sreemathi.v

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Which of the following classes of organic compounds show metamerism

asked Mar 4, 2014 by meena.p

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The hybridisation of $'Al'$ in $AlCl_4^-$ is

asked Mar 4, 2014 by sreemathi.v

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Which of the following does not show geometrical isomerism ?

asked Mar 4, 2014 by meena.p

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Two elements $X$(atomic weight =$75$) and $Y$(atomic weight =16) combine to give a compound having $75.8 \%\; X$. The formula of the compound is

asked Mar 4, 2014 by meena.p

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$NH_3$ and $BF_3$ form an adduct readily because they form

asked Mar 4, 2014 by sreemathi.v

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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

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The structure of $O_3$ and $N_3^-$ are

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How many stereo isomers does this molecule have $CH_3CH =CHCH_2CHBrCH_3$

asked Mar 4, 2014 by meena.p

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Among the following,the paramagnetic species is

asked Mar 4, 2014 by sreemathi.v

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Which of the following is optically inactive

asked Mar 4, 2014 by meena.p

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An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave $C,38.71 \%$ and $H,9.67 \%$ .The empitical formula of the compound would be

asked Mar 4, 2014 by meena.p

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The correct decreasing order of priority for the functional groups of organic compound in the IUPAC system of momenclature is

asked Mar 4, 2014 by meena.p

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In Kjeldahl's method, nitrogen present is estimated as

asked Mar 4, 2014 by meena.p

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