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Which of the following cyclopentane derivatives is optically inactive ?

Polyethylene can be produced from $Ca{C}_2$ according to the following sequence of reactions.

$Ca{C}_2+H_{2}O\to CaO+C_2{H}_2\text{(Yield = 70 \%)}$

$C_2{H}_2+H_2\to C_2{H}_4\text{(Yield = 50 \%)}$ $n{C}_2{H}_4\to (C{H}_{2}C{H}_2{)}_n\text{(Yield = 20 \%)}$

Calculate the mass of polyethylene which can be produced from $20\text{kg}$ of $Ca{C}_2$.

Which of the following will undergo a faster $S_{N}2$?

Which of the following is the true structure of $H_2{O}_2$?

Water has high heat of vaporisation due to

A box of negligible mass containing one mole of an ideal mono atomic gas of molecular mass M moves with constant speed V on a smooth horizontal surface. If the box suddenly stops, then a change in the temperature of the gas will be

Given that bond energies of
$H–H$ and $Cl-Cl$ are $430kJmo{l}^{-1}$ and $240kJmo{l}^{-1}$ respectively and ${\Delta }_{f}H$ for $HCl$ is -90 kJ $mo{l}^{-1}.$ The bond enthalpy of $HCl$ is:

In a process, temperature and volume of one mole of an ideal monoatomic gas, are varied according to the relation $VT=K$, where $K$ is a constant. In this process, the temperature of the gas is increased by $\Delta T$. The amount of heat absorbed by gas is ($R$ is the gas constant ):

The decreasing order of $N-O$ bond lengths in $N{O}_2^{+}$, $N{O}_2^{-}$ and $N{O}_3^{-}$ is:

Which of the following Fischer's projection formula is identical to D-glyceraldehyde ?

The minimum energy necessary to overcome the attractive force between the electron and the surface of silver metal is $7.52\times {10}^{-19}J$. What will be the maximum kinetic energy of the electrons ejected from silver which is being irradiated with ultraviolet light having a wavelength $360\AA$?

Name two metallic properties other than malleability and sonorus nature

Which of the following give no residue on heating ?

For the reaction:

$4N{H}_3\left(g\right)+3O_2\left(g\right)\to 2N_2\left(g\right)+6H_{2}O\left(l\right)$

at $298K$. Given that heat of formation of $N{H}_3(g$) and $H_{2}O\left(l\right)$ are $-46kJmo{l}^{-1}$ and $-286kJmo{l}^{-1}$ respectively. Calculate heat of reaction at $298K$.

Ethyl chloride $\left(C_2{H}_{5}Cl\right)$ is prepared by reaction of ethylene with hydrogen chloride:

$C_2{H}_4\left(g\right)+HCl\left(g\right)\to C_2{H}_{5}Cl\left(g\right)\Delta H=-72.3\text{kJ/mol}$

What is the value of $\Delta E$ (in kJ), if $98\text{g}$ of ethylene and $109.5\text{g}$ of $HCl$ are allowed to react at $300\text{K}$ ?

Sort the following according to the decreasing order of magnetic moments.

The correct order of atomic radii for the following species $S,P,Se$ and $Cl$ is:

According to Bohr's theory

Identify ‘Q’ in the following sequence of reactions;

The formula E = mc² states that the equivalent energy (E) can be calculated as the mass (m) multiplied by the speed of light (c = about 3×10⁸ m/s) squared. Write a program that accepts the mass of an object and determines its energy.

A vessel at $1000\text{K}$ contains carbon dioxide with a pressure of $0.4\text{atm}$. Some of the carbon dioxide is converted to carbon monoxide on addition of graphite. Calculate the value of K if the total pressure at equilibrium is $0.7\text{atm}$

The coagulating power of electrolytes having ions $N{a}^{+},A{l}^{3+}$ and $B{a}^{2+}$ for arsenic aulphide sol increase in the order

After the extraction process of gold, the traces of Cyanide can be removed by

Which one of the following ionic species will impart colour to an aqueous solution?

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