For the reaction $A(g) \rightleftharpoons B(g)$ at 495 K, $\Delta_r G^\circ = -9.478 kJ.mol^{-1} $. If we start the reaction in a closed container at 495 K with 22 millimoles of A, the amount of B in the equilibrium mixture is _ _ _ _ millimoles. (Round off to the nearest integer)
[$R=8.314 J.mol^{-1} .K^{-1} $; ln 10 = 2.303 ] Continue reading For the reaction $A(g) \rightleftharpoons B(g)$ at 495 K ….
Two salts $A_2 X $ and MX have the same value of solubility product of $4.0 \times 10^ {-12} $. The ratio of their molar solubilities i.e. $\frac{{S({A_2}X)}}{{S(MX)}} =$ _ _ _ _ . (Round off to the nearest integer) Continue reading Two salts $A_2 X $ and MX have the same value of ….
When light of wavelength 248 nm falls on a metal of threshold energy 3.0 eV, the de-Broglie wavelength of emitted electron is _ _ _ _ $A^\circ $. (Round off to the nearest integer)
[Use $\sqrt 3 = 1.73$, $h=6.63 \times 10^{-34} Js$, $m_e = 9.1 \times 10^{-31} Kg $, $c = 3.0 \times 10^8 ms^{-1}$, $1 eV = 1.6 \times 10^{-19} J$] Continue reading When light of wavelength 248 nm falls on a metal ….
Complete combustion of 750 g of an organic compound provides 420 g of $CO_2 $ and 210 g of $H_2 O $. The percentage composition of carbon and hydrogen in organic compound is 15.3 and _ _ _ _ respectively. (Round off to the nearest integer) Continue reading Complete combustion of 750 g of an organic compound ….
$2MnO_4^- +bC_2O_4 ^{2-} + CH^+ \rightarrow xMn^{2+} + y CO_2 + z H_2 O $
If the above equation is balanced with integer coefficients, the value of c is _ _ _ _ . (Round off to the nearest integer) Continue reading $2MnO_4^- +bC_2O_4 ^{2-} + CH^+ $
$\downarrow $
$ xMn^{2+} + y CO_2 + z H_2 O $
In chemistry, a mole is a unit of measurement used to express the amount of a substance. One mole of a substance contains Avogadro’s number of particles, which is approximately 6.02 x 1023. The concept of the mole is essential to chemistry as it allows chemists to easily calculate the amount of a substance in a reaction and convert between units of mass, volume, and number of particles. Continue reading Mole Concept
Cycloalkanes are a class of organic compounds that consist of closed rings of carbon atoms, with each carbon atom bonded to two other carbon atoms and two hydrogen atoms. They are also known as cyclic hydrocarbons, and their ring structure gives them unique chemical and physical properties. Cycloalkanes can be categorized based on the number of carbon atoms in the ring, and their properties vary based on the size of the ring. Continue reading Cycloalkanes
