Recent questions in Chemistry

The equilibrium constant for the given reaction is 100 $N_2 +2O_2 \rightleftharpoons 2NO_2$ What is the equilibrium for the reaction given below : $NO_2 \rightleftharpoons \large\frac{1}{2}$ $N_2+O_2$

asked Oct 16, 2013 by meena.p

1 answer

The Cubic Unit cell of a metal (molar mass $=63.55\;g\;mol^{-1})$ has an edge length of $362\;pm$ . Its density is $8.92\;g.cm^{-3}$ . The type of unit cell is :

asked Oct 15, 2013 by meena.p

1 answer

At $25^{\circ}$ the molar conductances at infinite dilution for the strong electrolytes $NaOH,NaCl$ and $Bacl_2$ are $248 \times 10^{-4},126 \times 10^{-4}$ and $280 \times 10^{-4}s.m^2. mol^{-1}$ respectively . $\lambda^{\circ}_mBa(OH)_2$ in $s.m^2 mol^{-1}$ :

asked Oct 15, 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

For the following cell reaction $Ag | Ag^{+} | AgCl | Cl^{\ominus } | Cl_2,Pt\; \Delta G^{\circ}_f (AgCl)=-109\; kJ/mol;$ $\Delta G^{\circ}_f (Cl^{\ominus})=-129 \; kJ/mol;\Delta G^{\circ}_f (Ag^+)=78\; kJ/mol ; E^{\circ}$ of the cell is :

asked Oct 15, 2013 by meena.p

1 answer

Consider the following reaction

asked Oct 15, 2013 by meena.p

1 answer

During the depression of freezing point experiment an equilibrium is established between the molecules of :

asked Oct 15, 2013 by meena.p

1 answer

Parkinson's disease is linked to abnormalities in the level of dopamine in the body. The structure of dopamine is :

asked Oct 15, 2013 by meena.p

1 answer

A codon has a sequence of $\underline {\underline {A}}$ , and specifies a particular $\underline {\underline {B}}$ that is to be incorporated into a $\underline {C}$ . What are $\underline {A},\underline {B},\underline {C}?$

asked Oct 15, 2013 by meena.p

1 answer

How many tripeptides can be prepared by linking the amino acids glycine, alanine and phenyl alanine?

asked Oct 15, 2013 by meena.p

1 answer

What are $\underline {X}$ and $\underline {Y}$ in the following reaction sequence : $C_2H_5OH \longrightarrow \underline{X} \longrightarrow \underline{Y}$

asked Oct 15, 2013 by meena.p

1 answer

IUPAC name of

asked Oct 15, 2013 by thanvigandhi_1

1 answer

Which one of the following order is correct for the first ionisation energies of the elements?

asked Oct 15, 2013 by meena.p

0 answers

Match the following :

asked Oct 15, 2013 by meena.p

1 answer

pH of a buffer solution decreases by $0.02$ units when $0.12$ g of acetic acid is added to $250\;ml$ of a buffer solution of acetic acid and Potassium acetate at $27^{\circ}$ . The buffer capacity of the solution is :

asked Oct 15, 2013 by meena.p

1 answer

How many 'ml' of perhydrol is required to produce sufficient oxygen which can be used to completely convert 2 lit of $SO_2$ gas to $SO_3$ gas?

asked Oct 15, 2013 by meena.p

1 answer

The correct Fischer projection formula of (2R, 3R)-2, 3-dihydroxy butanoic acid is

asked Oct 15, 2013 by thanvigandhi_1

1 answer

Assertion (A) : K,Rb and Cs form superoxides. Reason (R): The stability of the superoxides increase from 'K' to 'Cs' due to decrease in lattice energy.

asked Oct 15, 2013 by meena.p

0 answers

The average kinetic energy of one molecule of an ideal gas at $27^{\circ}C$ and 1 atm. pressure is :

asked Oct 15, 2013 by meena.p

1 answer

Aluminium reacts with $NaOH$ and forms compound 'X'.If the coordination number of aluminium in $'X'$ is 6, the correct formula of X:

asked Oct 15, 2013 by meena.p

1 answer

$1.5\;g$ of $CdCl_2$ was found to contain $0.9\;g$ of Cd. Calculate the Atomic weight of $Cd.$

asked Oct 15, 2013 by meena.p

1 answer

$SiCl_4$ on hydrolysis forms $'X'$ and HCl. Compound $'X'$ loses water at $1000^{\circ}$ and gives $'Y'$ . Compounds $'X'$ and $'Y'$ respectively are :

asked Oct 15, 2013 by meena.p

1 answer

Dipole moment of $HCL=1.03\;D,HI=0.38\;D$ . Bond length of $HCL=1.3\; A$ and $HI=1.6 A$ . The ratio of fraction of an electric charge, $\delta$ , existing on each atom in HCl and HI is :

asked Oct 15, 2013 by meena.p

1 answer

Which one of the following reactions is not correct?

asked Oct 15, 2013 by thanvigandhi_1

0 answers

Which pair of oxyacids of phosphorous contains $'P-H'$ bonds ?

asked Oct 15, 2013 by meena.p

1 answer

In Gattermann reaction, a diazonium group is replaced by $\underline {X}$ using $\underline{Y},X,Y$ are :

asked Oct 15, 2013 by meena.p

1 answer

The type of bonds present in sulphuric anhydride :

asked Oct 15, 2013 by meena.p

1 answer