Recent questions in Chemistry

Among the following the paramagnetic compound is

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The species having bond order different from that in CO is

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The bonds between carbon atom (1) and carbon atom (2) in compound $N \equiv C-CH =CH_2$ involves the hybrid is :

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Both $[Ni(CO)_4]$ and $[Ni(CN)_4]^{2-}$ are diamagnetic.The hybridisation of nickel in these complexes ,respectively are

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The change in the state of hybridization of the asterisked carbon in the following reaction :

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The species having pyramidal shape is

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Based on VSPER theory,the number of 90 degree F-Br F angles in $BrF_5$ is

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Which of the following statement is false about an electrophile ?

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Stability of the species $Li_2,Li_2^-$ and $Li_2^+$ increases in the order

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The correct IUPAC name for the following compound is :

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According MO theory,which of the following species has the shortest bond length?

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The hybridisation of orbitals of N atoms in $NO_3^-,NO_2^+$ and $NH_4^+$ are respectively

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

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Which of the following is not isoelectronic?

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Which of the following is the correct order of their stability?

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Which atoms in $H_2O$ and $ClF$ are negatively charged

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The bond order and magnetic behaviour of $He_2^{2+}$ are respectively

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Which of the following molecule has the highest dipole moment

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The repeating units in PTFE are

asked Mar 5, 2014 by thanvigandhi_1

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The S In BuNa –S refers to

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BuNa - S is which of the following?

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Bakelite is ?

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Polymers are

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Consider the following organic compound. To make it a chiral compound. The attack should be on which carbon?

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Total number of isomers of $C_4H_{10}O$ will be

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The total number of isomers for $C_4H_8$ is

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The volume occupied by 1 mole of gas at 1 bar pressure and 273.15K is.....

asked Mar 5, 2014 by sharmaaparna1

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The two isomers given below are :

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A 2.24 litre cylinder containing $O_2$ gas at $27^{\large\circ}C$ and 2 atm is found to develop a leakage was repaired , the pressure dropped to 100cm of Hg at $27^{\large\circ}C$ . The number of moles of gas escaped out during leakage is :

asked Mar 5, 2014 by sharmaaparna1

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Structures , $CH_3COCH_3$ and $CH_2 =CH (OH) CH_3$ represent

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The number of enantiomers of the compound $CH_3CHBrCHBrCOOH$ is

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Which of the following will have a meso- isomer also ?

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The number of $\sigma$ and $\pi$ bonds in $1,3$-butadiene

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which among the following is likely to show geometrical isomerism ?

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The maximum $'S'$ character is in

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The hybridisation of Sn in $SnCl_6^{2-}$ is

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Most stable carbanion is

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The arrangement of $(CH_3)_3C-,(cH_3)_2CH-,CH_3CH_2-$ when attached to benzene or an unsaturated group, in increasing order of inductive effect is

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Lewis Octet rule was failed ,to explain the following structure of molecule

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Which of the following compounds is not chiral ?

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The number of outer electron in $N_3^-$ are

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In triplet carbenes, the two electrons

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The hybridisation of central 'O' atom in $O_3$ molecule is

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The number of $\sigma$-bonds and $\pi$-bonds in $XeO_4$ are

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Acetaldehyde is the rearranged product of

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Which one of the following statement is correct for $CsBr_3$?

asked Mar 5, 2014 by sreemathi.v

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The following is the percentage composition of a compound. $Na = 16.08 \%, C = 4.19 \%, O = 16.78 \%$ and $H_2O = 62.95 \%$ . Its molecular formula is

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The square pyramidal molecular shape is adopted by

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Which one of the following is the least stable compound?

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An organic compound contains $C=40 \%,O=53.34\%$ and $H-6.60 \%$ . The empirical formula of the compound is :

asked Mar 5, 2014 by meena.p

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