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If V is the observed molar volume of real gas and $V_{id}$ is the molar volume of an ideal gas then Z is___.

$E^{\circ }$ value of $M{g}^{2+}|Mg,Z{n}^{2+}|Zn$ and $F{e}^{2+}|Fe$ are – 2.37 V, - 0.76 V and 0.44 V respectively. Which of the following is correct?

Assertion (A) Network polymers are thermosetting.

Reason (R) Network polymers have high molecular mass.

(a) Assertion and Reason both are correct statement But reason does not explain Assertion.

(b) Assertion and Reason both are correct statement and Reason explains the Assertion.

(c) Both assertion and reason are wrong statements.

(d) Assertion is correct statement and Reason is wrong statement.

(e) Assertion is wrong statement and reason is correct statement.

Calculate the freezing point of a solution when 31 gram of Ethylene glycol is dissolved in 500 gram of water. (

Kf for water=1.86 k kg /mol

The graph plot between log V and log T according to Charle's Law will be:

Calculate the wavelength of the radiation which would cause the photodissociation of a chlorine molecule if the $Cl-Cl$ bond energy is $240{\text{kJ mol}}^{-1}$.

Take $h=6.6\times {10}^{-34}\text{J s},N_A=6\times {10}^{23}$

A water contains the following dissolved ions.

$\left[N{a}^{+}\right]=56mg/L;\left[C{a}^{2+}\right]=40mg/L;$

$\left[M{g}^{2+}\right]=30mg/L;\left[A{l}^{3+}\right]=3mg/L;$

$\left[HC{O}_3^{-}\right]=190mg/L;\left[C{l}^{-}\right]=165mg/L;$

Water pH is 7.

Atomic weights:

$Ca=40,Mg=24,Al=27,H=1,C=12,O=16,Na=23,Cl=35.5$



The total hardness of the sample in mg/L as $CaC{O}_3$ is

Write the balanced chemical equations for the following reactions:

1. Sodium hydrogen carbonate on reaction with hydrochloric acid gives sodium chloride, water and liberates carbon dioxide gas.


2. Copper sulphate on treatment with potassium iodide precipitates cuprous iodide (CuI) liberates iodine gas and also forms potassium sulphate.

In the following reaction, the major product in the presence of peroxide is

A cylinder with fixed capacity of $67.2$ lit contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by $20°\text{C}$ is:

[Given that $R=8.31{\text{J mol}}^{-1}{\text{K}}^{-1}$]

The increasing order of reactivity of the following halides for the $S_{N}1$ reaction is

$\left(I\right).C{H}_{3}CH\left(Cl\right)C{H}_{2}C{H}_3$

$\left(II\right).C{H}_{3}C{H}_{2}C{H}_{2}Cl$

$\left(III\right).p-H_{3}CO-C_6{H}_4-C{H}_{2}Cl$

Find the total number of moles of electrons in $6.023\times {10}^{23}N{O}_3^{-}$ ions ?

Blood cells retain their normal shape in solution which are

Arrange the following: $C{H}_{3}C{H}_{2}C{H}_{2}Cl\left(I\right),C{H}_{3}C{H}_{2}CHClC{H}_3\left(II\right){\left(C{H}_3\right)}_{2}CHC{H}_{2}Cl\left(III\right)and{\left(C{H}_3\right)}_{3}C-Cl\left(IV\right)$ in order of decreasing tendency towards $S{N}^2$ reaction

The weight of $181.60\text{mL}$ of a diatomic gas at $0{}^{\circ }\text{C}$ and $1\text{bar}$ pressure is $1\text{g}$. The mass of one molecule (in g) of the gas is:
$(N_A$ is the Avogadro's constant)

The Riemer Tiemann reaction introduces an aldehyde group, on to the aromatic ring of phenol, ortho to the hydroxyl group. This reaction involves electrophilic aromatic substitution. This is a general method for the synthesis of substituted salicylaldehydes as depicted below

Which one of the following reagents is used in the above reaction?

Compound M is formed by the reaction of:

The molar entropy content of 1 mole of oxygen $\left(O_2\right)$ gas at $300\text{K}$ and $1\text{atm}$ is $250{\text{J mol}}^{-1}{\text{K}}^{-1}$. Calculate $\Delta G$ when 1 mole of oxygen is expanded reversibly and isothermally from $300\text{K}$, $1\text{atm}$ to double its volume (Take $R=8.314{\text{J mol}}^{-1}{\text{K}}^{-1},\text{log}e=2.303$)

In the structure of $(S{b}_2{F}_{11}{)}^{-}$ the total number of hybrid orbitals present per $Sb$ - atom are:

The molecular formula of a commercial resin used for exchanging ions in water softening is $C_8{H}_{7}S{O}_{3}Na$ (molecular weight = 206). What would be the maximum uptake of $C{a}^{2+}$ ions by the resin when expressed in mole per gram resin?

The relationship between osmotic pressure at 273K when 10 g glucose (P₁),10g urea (P₂) and 10g sucrose (P₃) are dissolved in 250 ml of water is