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Half mole of an ideal monoatomic gas is heated at constant pressure of $1\text{atm}$ from ${20}^{\circ }\text{C}\text{to}{90}^{\circ }\text{C}$. Work done by gas is close to: (Gas constant $R=8.31\text{J/mol-K}$)

In the given reaction, the product E is :

Which is the counter ion in $K_2\left[Co\right(N{H}_3{)}_{5}Cl]$?

An apparatus used for the measurement of quantity of electricity is known as a

[BHU 1979]

The simplest formula of a compound containing 21.9%Mg, 27.8%P, 50.3% O, by mass is.......

The process of eudiometry is used to calculate the volume of the various reacting gases present together in a closed vessel, it is done by sparking the content and noting the volume change or pressure change depending upon the conditions mentioned. Various reagents like alkaline pyrogallol, turpentine oil, caustic potash, conc. $H_{2}S{O}_4$ are used to absorb the selective gases like $O_2,O_3,C{O}_2\text{and}{H}_{2}O\left(v\right)$ respectively. A $2.0$ mole mixture of $H_2\left(g\right),O_2\left(g\right)\text{and}He\left(g\right)$ are placed together in a closed container at pressure equal to $50\text{atm}$. An electric spark is passed and pressure is noted as $12.5\text{atm}$ after cooling the content to original temperature (room temp). Oxygen gas is introduced for pressure to change to $25\text{atm}$, keeping volume and temperature constant. Again electrical spark is passed and pressure drops to $10\text{atm}$ under original temperature conditions. The mole fraction of $H_2\left(g\right)$ present in the initial mixture is:

The ratio of total acceleration of the electrons in singly ionized helium atom and hydrogen atom (both in ground state) is -



Assume uniform circular motion of electrons.

Which of the following can undergo in Hell-Volhard-Zelinsky Reaction?

Which of the following compounds has the maximum covalent character?

Which of the following is not a target molecule for drug function in the body?

(a) Carbohydrates
(b) Lipids
(c) Vitamins
(d) Proteins

What is chirality

Passing $H_{2}S$ gas into a mixture of $M{n}^{2+},N{i}^{2+},C{u}^{2+}\text{and}H{g}^{2+}$ ions in an acidified aqueous solution precipitates

The rusting of iron takes place as:

$2H^{+}+2e^{-}+\frac{1}{2}{O}_2\to H_{2}O\left(l\right);E^o=+1.23V$

$F{e}^{2+}+2e^{-}\to Fe\left(s\right);E^o=-0.44V$

Thus $\Delta G^o$ for the net process is

Derive the expression for the stopping potential in terms of frequency of incident radiation and hence draw the graph showing the variation of the two quantities with respect to each other.

For irreversible expansion of ideal gas under isothermal condition, the correct option is:

If heat is given to an ideal gas at constant pressure, then select the graph which best represents the variation of $VT$ with temperature $\left(T\right)$.

Find the number of non square numbers between the squares of 11 and 12.

Enthalpy of neutralisation of the reaction between $C{H}_{3}COOH(aq.)andNaOH(aq.)is-13.2kcale{q}^{-1}$ and that of the reaction between $H_{2}S{O}_4(aq.)$ and KOH (aq.) is - 13.7 kcal $e{q}^{-1}.$ The enthalpy of dissociation of $C{H}_{3}COOH(aq.)$ is:

The principle ore from which copper is extracted is copper __.

In Which
of the following pairs, molecules have bond order three
and are isoelectronic?

Why has it
been difficult to study the chemistry of radon?

What are the main uses of non-metals?

Which of the following has been arranged in increasing order of size of the hybrid orbitals ?