List of top Chemistry Questions on Stoichiometry and Stoichiometric Calculations asked in AP EAPCET

In the estimation of nitrogen by Kjeldahl's method, the ammonia evolved from 0.30 g of an organic compound (X) was passed into 100 mL of 0.1 M $\text{H}_2\text{SO}_4$. The unreacted acid required 20 mL of 0.5 M NaOH for complete neutralization. What is X?

One mole of $O_2$ (g) was passed over hot coke. At the end of the reaction, 40 % of $O_2$ (g) was unreacted. What is the volume (in L) of reaction mixture at STP (273.15 K and 1 bar)? (Assume only CO (g) is formed in the reaction)

How many moles of $\mathrm{CO_2}$ are produced when 4 moles of $\mathrm{C_2H_6}$ (ethane) combust completely?
Given reaction: \[ 2 \mathrm{C_2H_6} + 7 \mathrm{O_2} \rightarrow 4 \mathrm{CO_2} + 6 \mathrm{H_2O} \]

How many atoms are present in 1 mole of oxygen gas (O₂)?

1.84 g of a mixture of CaCO$_3$ and MgCO$_3$ is strongly heated to get a residue of 0.96 g. The percentage of CaCO$_3$ in the mixture is

The number of extensive and intensive properties in the list given below is respectively: % List - Density, enthalpy, mass, temperature, volume, pressure

Consider the following reaction A(g) + 3B(g) $ \longrightarrow $ 2C(g); $ \Delta H^\ominus = -24 $ kJ. At $25 \, ^\circ\text{C}$ if $ \Delta G^\ominus $ of the reaction is -9 kJ, the standard entropy change (in JK$^{-1}$) of the same reaction at same temperature is

For which reaction $ \Delta H \neq \Delta U $?

What is the number of moles in 88 grams of carbon dioxide (CO₂)?

1 mole of an ideal gas is allowed to expand isothermally and reversibly from 1L to 5L at 300 K. The change in enthalpy (in kJ) is
(R = 8.3 J K$^{-1}$ mol$^{-1}$)

Consider the following reaction A(g) + 3B(g) $ \longrightarrow $ 2C(g); $ \Delta H^\ominus = -24 $ kJ. At $25 \, ^\circ\text{C}$ if $ \Delta G^\ominus $ of the reaction is -9 kJ, the standard entropy change (in JK$^{-1}$) of the same reaction at same temperature is

Consider the following
Statement-I: During isothermal expansion of an ideal gas its enthalpy decreases.
Statement-II: When 2.0 L of an ideal gas expands isothermally into vacuum, $\Delta U = 0$.

At 273 K the maximum work done when pressure on 10 g of hydrogen is reduced from 10 atm to 1 atm under isothermal, reversible conditions is

A solid compound is formed by atoms of A (cations), B (cations), and O (anions). Atoms of O form an hcp lattice. Atoms of A occupy 25% of tetrahedral holes and atoms of B occupy 50% of octahedral holes. What is the molecular formula of the solid?

In neutral or faintly alkaline medium, ${MnO4^-}$ oxidizes ${I^-}$ to iodate. What is the number of moles of ${KMnO_4}$ required to completely convert 1 L of 0.5 M KI to iodate?

Observe the following reaction \[ \text{a} \, \text{P}_4(s) + \text{b} \, \text{OH}^-(aq) + \text{H}_2\text{O}(l) \rightarrow \text{c} \, \text{PH}_3(g) + \text{d} \, \text{H}_2\text{PO}_4^-(aq) \] a, b, c and d are respectively

The weight percentage of C and H in a hydrocarbon is in the ratio of 4:1. What is its empirical formula?

x g of methane was burnt completely in the presence of oxygen. The liberated gases were passed into a solution containing 370 g of Ca(OH)$_2$. The weight of white precipitate obtained was 500 g. What is the value of x (in g)? (Given : C = 12; H = 1; Ca = 40; O = 16 u)

Observe the following reaction \[ xS_8 (s) + yOH^-(aq) \to zS^{2-}(aq) + 2S_2O_3^{2-}(aq) + 6H_2O(l) \] x, y and z are respectively.

48 g of methane was completely burnt in the presence of oxygen. The liberated gas was passed into a solution containing 370 g of Ca(OH)$_2$. What is the weight (in g) of CaCO$_3$ formed?
(Atomic weights: C = 12, H = 1, Ca = 40, O = 16)

The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is

How many moles are there in 18 grams of water ($ \text{H}_2\text{O} $)? (Atomic masses: H = 1, O = 16)