3A → 2B,rate of reaction +d[B]/dt is equals to
– \(\frac{3}{2}\frac{d[A]}{dt}\)
– \(\frac{2}{3}\frac{d[A]}{dt}\)
\(-\frac{1}{3}\frac{d[A]}{dt}\)
\(2d\frac{d[A]}{dt}\)
The correct option is (B) : \(\frac{2}{3}\frac{d[A]}{dt}\)
3A→2B For the given reaction we can write rate of reaction: −\(\frac{1}{3}\)=\(\frac{d[A]}{dt}\) =−\(\frac{1}{20}\)\(\frac{d[B]}{dt}\) ⇒+\(\frac{d[B]}{dt}\)= −\(\frac{2}{3}\frac{d[A]}{dt}\)
In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl. The percentage composition of chlorine in the compound is ___________%. [Given: Molar mass in g mol\(^{-1}\) of Ag = 108, Cl = 35.5]
Consider the following reaction occurring in the blast furnace. \[ {Fe}_3{O}_4(s) + 4{CO}(g) \rightarrow 3{Fe}(l) + 4{CO}_2(g) \] ‘x’ kg of iron is produced when \(2.32 \times 10^3\) kg \(Fe_3O_4\) and \(2.8 \times 10^2 \) kg CO are brought together in the furnace.
The value of ‘x’ is __________ (nearest integer).

The rate of a chemical reaction is defined as the change in concentration of any one of the reactants or products per unit time.
Consider the reaction A → B,
Rate of the reaction is given by,
Rate = −d[A]/ dt=+d[B]/ dt
Where, [A] → concentration of reactant A
[B] → concentration of product B
(-) A negative sign indicates a decrease in the concentration of A with time.
(+) A positive sign indicates an increase in the concentration of B with time.
There are certain factors that determine the rate of a reaction: