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The spectral series of $H-$ atom gives ${\overline{v}}_{\text{min}}$ and ${\overline{v}}_{\text{max}}$ depending on the types of transition. Which of the following is/are true?

Calculate the atomic mass (average) of chlorine using the following data:

Which of the following is/are resonating structure(s) of phenoxide ion?

Which of the following will react with aqous NaOH and why

a)C6H5OH

B)C6H5CH2OH

C)(CH3)3COH

D)C2H5OH

$CsBr$ crystallises in a bcc lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs=133 and that of Br=80 amu and Avogadro no. being 6.02310 per mol the density of $CsBr$ is? 42.5 g/cc 0.425 g/cc 8.25 g/cc 4.25 g/cc

What is collision theory of chemical reaction ?

The number of carbon atoms in hexane are

आशय स्पष्ट करो −

(क) रस उँडेल कर गा लेती है

(ख) चढ़ी नदी का दिल टटोलकर

जल का मोती ले जाती है

Consider the following series of reactions:

$C{l}_2+2NaOH⟶NaCl+NaClO+H_{2}O3NaClO⟶2NaCl+NaCl{O}_{3}4NaCl{O}_3⟶NaCl+3NaCl{O}_4$



How many mole of total $NaCl$ formed by using $1$ mole $C{l}_2$ and other reagents in excess?

$△H$ and $△S$ for the reaction: $A{g}_{2}O\left(s\right)\to 2Ag\left(s\right)+\frac{1}{2}{O}_2\left(g\right)$ are 30.56 kJ $mo{l}^{-1}$ and 66.0 J $K^{-1}mo{l}^{-1}$ respectively. Calculate the temperature at which free energy change for the reaction will be zero. Predict whether the forward reaction will be favored above or below this temperature.

The dihedral angle between the two methyl groups in gauche conformation of n-butane is

On moving across a period, the atomic size decreases and nuclear charge increases and therefore the force of attraction exerted by the nucleus on the electron in the outermost shell increases.
For the process
$A_{\left(g\right)}+e^{-}\to A_{\left(g\right)}^{-};\Delta H=xand{A}_{\left(g\right)}^{-}\to A_{\left(g\right)}+e^{-};\Delta H=y$
Select correct alternate:

E° for F2 + 2e- -> 2F- is 2.8V, E° for 1÷2 F2 + e -> F- is

Ans : 2.8V

Please give detailed explanation as I won't be able to understand concise answers .

What are the hydrolysis products of

(i) Sucrose

(ii) What are the hydrolysis products of lactose?

0.1 mole of $C{H}_{3}N{H}_2(K_b=5\times {10}^{-4}$ is mixed with 0.08 mole of $HCl$ and

diluted to one litre. What will be the $H^{+}$ concentration in the solution?

For $I_2+2e^{-}\to 2I^{-}\text{standard reduction potential}=+0.54\text{Volt}.$
For $2B{r}^{-}\to B{r}_2+2e^{-}\text{standard oxidation potential}=-1.09\text{Volt}.$
For $Fe\to F{e}^{2+}+2e^{-},\text{standard oxidation potential}=+0.44\text{Volt}.$
Which of the following reaction(s) is/are spontaneous:

Phenol when first treated with concentrated ${\text{H}}_{2}S{O}_4$ and then with concentrated $HN{O}_3$ gives

Which of the following is form when lime water react with chorine ?

The coordination number in hcp is:

When 35 mL of 0.15 M lead nitrate solution is mixed with 20 mL of 0.12 M chromic sulphate solution, x×10−5 moles of lead sulphate are precipitated out.The value of x Rounded off to the nearest integer is

How will you prepare the following compounds from benzene ? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.

Methyl benzoate

m - nitrobenzoic acid

p - nitrobenzoic acid

Phenyl acetic acid

p - nitrobenzaldehyde.