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The basic building block of polyester is

The normality of 6M H₃PO₄ solution

What amount of current is required to be passed during a period of 5 minutes in order to deposit 0.6354gm of copper by electrolysis of aqueous cupric sulphatesolution? (Molar wt. of Copper = 63.5gm/mole)

Valence shell electronic configuration of $C{r}^{2+}$ is:

An ideal gas undergoes a reversible isothermal expansion from state $I$ to state $II$ followed by a reversible adiabatic expansion from state $II$ to state $III$ The correct plot(s) representing the changes from state $I$ to state $III$ is(are)

$(p:\text{pressure},V:\text{volume},T:\text{temperature},H:\text{enthalpy},S:\text{entropy})$

Why is the milk of magnesia used in antacids?

An ideal gas $[\frac{C_P}{C_V}=\gamma ]$ has initial volume $V_0$ is kept in a vessel. It undergoes a change & follows the following relation $P=K{V}^2$ (where P is pressure & V is volume). The change in internal energy of the gas is $\frac{K}{\gamma -1}\left[\right(\frac{P_0}{K}{)}^{\frac{\alpha }{\beta }}-V_0^3]$ ; where $P_0$ is final pressure, $\alpha$ & $\beta$ are integer. Find the minimum value of $(\alpha +\beta )$.___

Bond energy of $F_2$ is $150KJmol{e}^{-1}$. The minimum frequency of photon required to break F - F bond is

At 298.2 K the relationship between enthalpy of bond dissociation (in kJ ${\text{mol}}^{-1}$) for hydrogen $\left(E_H\right)$ and its isotope, deuterium $\left(E_D\right)$, is best described by

During sewage treatment biogas produced includes

The enthalpy change for a given reaction at 298 K is $-xJmo{l}^{-1}$ (x being positive). If the reaction occurs spontaneously at 298 K, the entropy change at that temperature

The products P and Q of the following reactions are respectively:

The edge length of a face centered cubic cell of an ionic substance is $508pm$. If the radius of the cation is $110pm$, the radius of the anion is:

Assume cations at octahedral voids and anoins at FCC sites.

1. 544

In the reactions

$\left(B\right)\underset{H_2}{\overset{\text{Lindlar catalyst}}{\leftarrow }}R-C\equiv C-R\stackrel{Na/N{H}_3}{\to }\left(A\right)$

$\left(A\right)$ and $\left(B\right)$ are geometrical isomers. Then:

Which of the following reactions depicts the reducing action of hydrogen peroxide ?

Which of the following cannot exist on the basis of MO theory?

1, - 2 Diethylbenzene on ozonolysis gives.... different products

A complex is written as M(en) .xBr. Its 0.05 molar solution shows 2.46 atm osmotic pressure at 27°c. Assuming 100% ionisation and coordination number of metal (III) is six, complex may be

(1) [M(en)2Br2]Br

(2) [M(en)3]Br3

(3) [M(en)2BrJBr2

(4) [M(en)]Br3

Which of the following compound is not known?

1. 4158

Suggest the reagents for the following conversion.

When $HN{O}_3\left(aq\right)$ is titrated with NaOH (aq) conductometrically, the graphical representation of this titration can be shown as