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How many hydrogens are replaced by deuterium?

Determine the solubilities of silver chromate, barium chromate, ferric hydroxide, lead chloride and mercurous iodide at 298K from their solubility product constants given in Table 7.9 (page 221). Determine also the molarities of individual ions.

The rate of diffusion of methane at a given temperature is twice that of gas X. The molar mass of X is?

Electrons are bombarded to excite hydrogen atoms and six spectral lines are observed. If $E_g$ is the ground state energy of hydrogen, the minimum energy the bombarding electrons should possess is

The temperature and volume of one mole an ideal gas during its expansion is related as $T=T_0+\alpha V^2$ where $T_0$ and $\alpha$ positive constants. R is the universal gas constant.
The volume at which the pressure is minimum is;

Which one of the gases is responsible for causing acid rain in atmosphere?

Among the halides, the order of decreasing lewis acid character is:
$1.BC{l}_3,2.AlC{l}_3,3.GaC{l}_3,4.InC{l}_3$

An open flask containing air is heated from $300K$ to $500K$ . What percentage of air will be escaped to the atmosphere, if pressure is kept constant?

The increasing order of acidities of the shown hydrogen atoms among the following is:

For a 3s - orbital
$\Psi \left(3s\right)=\frac{1}{a\sqrt{3}}{\left(\frac{1}{a_0}\right)}^{\frac{3}{2}}(6-6\sigma +{\sigma }^2){ϵ}^{\frac{-\sigma }{2}},$
Where $\sigma =\frac{2rZ}{3a_0}$
What is the maximum radial distance of node from nucleus is

Which of the following sequence will convert 3-phenylbutanenitrile to 3-phenylbutan-1-ol?

1 – workup

2 – $H_{2}O,H^{+},\Delta$

3 – reduction with $LiAl{H}_4$

The ratio of the molar heat capacities of an ideal gas is $C_p/C_v=7/6.$ Calculate the change in internal energy of 1.0 mole of the gas when its temperature is raised by 50 K .

(a) Keeping the pressure constant

(b) Keeping the volume constant and

(c) Adiabatically.

The enthalpy of combustion of $H_2\left(g\right)$ at 298 K to give $H_{2}O\left(g\right)$ is $-249kJmo{l}^{-1}$ and bond enthalpies of H - H and O = O are $433kJmo{l}^{-1}$ and $492kJmo{l}^{-1},$ respectively. The bond enthalpy of O - H is

Match the thermodynamic processes given below:

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{A. Freezing of water at 273K and 1 atm}& \text{p. q=0}\\ \text{B. Expansion of 1 mole of an ideal gas into a vacuum under isolated conditions}& \text{q. W=0}\\ \text{C. Mixing of equal volumes of two ideal gases at constant temperature and pressure in an isolated container}& \text{r. ΔSsys<0}\\ \text{D. Reversible heating of H2(g) at 1 atm from 300 K to 600K, followed by reversible cooling to 300K at 1 atm}& \text{s. ΔU=0}\\ & \text{t. ΔG=0}\end{array}$

The hydration energy of $M{g}^{2+}$ is larger than that of (J1984,1M)

The order of reactivity of haloalkenes is RI>RCl>RBr

Why

The $p{K}_b$ for fluorides ion at $25{}^{\circ }C$ is 10.83, if K is the ionization constant of hydrofluoric acid at this temperature then the value of log K is:

Which is the primary CO₂ acceptor in C₃ plants?RuBP or PGA ?

Strongest inter-molecular H-bond is present in _____

Which of the following is a ring silicate?

Calculate the total number of atoms in 0.5 Mole of K2Cr2O7

Select a suitable personal pronoun for the blank.

The soft toy _____ played with was dirty and torn.

Any two immiscible liquids when mixed form an:

When lead storage battery is charged

[MP PET 2003]

The color of KMnO4 is due to

What is lattice enthalpy?

The weight of 4-gram atoms of nitrogen is

Consider the compounds, $BC{l}_3$ and $CC{l}_4$. How will they behave with water? Justify.

Which among the following verbs is intransitive?

Amines are having higher boiling point than hydrocarbons because:

Suspension of slaked lime in water is known as
(a) lime water (b) quick lime (c) milk of lime (d) Aqueous solution of slaked lime

What would be correct order of acidic strength in the following molecules:

Give reasons for the following:

(i) o-nitrophenol is more acidic than o-methoxyphenol.

(ii) Butan-1-ol has a higher boiling point than diethyl ether.

(iii) $(C{H}_3{)}_{3}C–O–C{H}_3$ on reaction with HI gives $(C{H}_3{)}_{3}CI–$ and $C{H}_3–OH$ as the main products and not $(C{H}_3{)}_3$C–OH and $C{H}_3–I$.

Decomposition of $H_2$$O_2$​ can be retarded by the addition of

The molarity of a solution obtained by mixing 750 mL of 0.5 M HCL with 250 mL of 2 M HCL will be

Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them

Solubility product constant ($K_{sp}$) of salts of types MX, $M{X}_2$ and $M_{3}X$ at temperature 'T' are $4.0\times {10}^{-8},3.2\times {10}^{-14}$ and $2.7\times {10}^{-15},$ respectively. Solubilities (mol $d{m}^{-3}$) fo the salts at temperature 'T' are in the order

In a constant volume calorimeter 5g of a gas with molecular weight 40 was burnt in excess of oxygen at 298K. The temperature of the calorimeter was found to increase from 298K to 298.75K due to combustion process. Given that the heat capacity of the calorimeter is 2.5kJK^-1 , the numerical value for the change in internal energy of combustion of the gas in kJ /mol is?

Which of the following will not form an enolate?

How many unbonded $e^{-}$ are present on N in NO?

3 and 6 electrons are present in the outermost orbit of A and B respectively. The chemical formula of its compound will be?

Strongest acid out of the following is

An ideal gas expands against a constant external pressure of 2 atmosphere from 20L to 40L and absorbs 10kJ of heat from surrounding. What is the change in the internal energy of the system ?