Question
Difterentiate between electromagnetic wave and matter wave.

Answer

SELF

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Which of the two structures (A) and (B) given below is more stabilised by resonance? Explain.
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ _{\ominus}\\\text{CH}_3\text{COOH}\ \ \text{and}\ \ \text{CH}_3\text{COO}\\\ \ \ \ \ \ \ \ \ \ \text{(A)}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{(B)}$
Calculate the oxidation states of Carbon, Bromine and Manganese in $C _3 O _2$ (Carbon suboxide), $Br _3 O _8$ (Tribromo octaoxide) and $Mn _3 O _4$ respectively.
Define hybridisation. Explain the structure of C2H2 with orbital diagram.
Calculate the energy associated with the first orbit of He. What is the radius of this orbit?
Why conc. H2SO4 is used to absorb moisture from ethane while it is not used for ethylene?
Identify the redox reactions out of the following reactions and identify the oxidising and reducing agents in them.
$3\text{HCl(aq)}+\text{HNO}_3\text{(aq)}\xrightarrow{ \ \ \ \ \ \ \ \ }\text{Cl}_2\text{(g)}+\text{NOCl}(\text{g})+2\text{H}_2\text{O(l)}$
Which of the following are isoelectronic species i.e., those having the same number of electrons?
$
Na^{+}, K^{+}, Mg^{2+}, Ca^{2+}, S^{2-}, Ar
$
Which has larger absolute entropy per mole?
  1. H2O(l) at 298K or H2O(l) at 350K
  2. N2 or NO both at 298K
Find out the value of equilibrium constant for the following reaction at 298K.

$2\text{NH}_3(\text{g})+\text{CO}_2(\text{g})\rightleftharpoons\text{NH}_2\text{CONH}_2(\text{aq})+\text{H}_2\text{O(l)}$

Standard Gibbs energy change, $\Delta_\text{r}\text{G}^\circ$ at the given temperature is -13.6kJ mol-1.

The dissociation constant of HCOOH and $CH _3 COOH$ is $2 \times 10^{-4}$ and $1.8 \times 10^{-5}$ respectively then calculate the isohydric concentration of HCOOH with $0.03 N CH _3 COOH$.