List of top Chemistry Questions asked in AP EAMCET

The correct statements about the adsorption of gas on solid adsorbent are:
Adsorption is always exothermic. Physisorption may transform into chemisorption at high temperature. Physisorption increases with increasing temperature but chemisorption decreases with increasing temperature. In physisorption enthalpy of adsorption is 100 kJ mol$^{-1}$.

At T(K), the decomposition of N2O5(g) is a first-order reaction. The initial pressure of N2O5(g) is 'a' atm. After time, t, the total pressure of the reaction is 'p' atm. The rate constant (k) of the reaction is

The cell reaction of a cell is given below: \[ 2 \, \text{Cu}^{+} \rightarrow \text{Cu} + \text{Cu}^{2+} \]

What is $ E^0_{\text{cell}} $ (in V)?

Given: $ E^0_{\text{Cu}^{2+}/\text{Cu}^{+}} = x $ V; \quad $ E^0_{\text{Cu}^{+}/\text{Cu}} = y $ V

1 g of $ XY_2 $ is dissolved in 20 g of $ C_6H_6 $. The $ \Delta T_f $ of the resultant solution is 2.318 K. When 1 g of $ XY_4 $ is dissolved in 20 g of $ C_6H_6 $, its $ \Delta T_f $ is found to be 1.314 K. What are the atomic masses of X and Y respectively?
($ k_f $ of $ C_6H_6 $ is 5.1 K kg $ mol^{-1} $)

0.1 mole of H$_3$PO$_3$ is present in 500 mL of solution. The normality of it is:

A metal crystallizes in fcc lattice. The edge length of the unit cell is 200 pm. What is the radius (in m) of the metal atom?

Observe the following reaction sequence
Correct statement regarding Y is

What is $R_f$ of B in the following reaction?

Which of the following is present in the photochemical smog?

Identify the correctly matched sets:
CO - neutral oxide GeO - acidic oxide PbO - basic oxide

In which of the following reactions, hydrogen is one of the products formed?
Reaction of BF$_3$ with LiAlH$_4$ in diethyl ether Hydrolysis of diborane Oxidation of sodium borohydride with iodine Combustion of diborane

The total number of products formed in the following reactions:
LiNO$_3$ $\xrightarrow{\Delta}$ Products NaNO$_3$ $\xrightarrow{\Delta}$ Products Be(NO$_3$)$_2$ $\xrightarrow{\Delta}$ Products

Which of the following properties of $ {D}_2{O} $ is less when compared to $ {H}_2{O} $?

At 298 K, the ionization constant of $ {CN}^- $ is $ 2.08 \times 10^{-6} $. What is the ionization constant of its conjugate acid? (Given $ K_w = 10^{-14} $)

One mole of an ideal gas undergoes a change of state from (1.0 atm, 3.0 L, 200 K) to (4.0 atm, 5.0 L, 250 K) with a change in internal energy of 60 L-atm. What is the change in enthalpy of the process (in kJ)? (1 L-atm = 101 J)

The oxidation state of vanadium in Rb$_4$Na[$HV_{10}$O$_28$] is $x$ and the oxidation state of chlorine in Ca(ClO$_2$)$_2$ is $y$. The sum of $x$ and $y$ is:

At T(K), the value of $ K_c $ for the reaction
\[ AO_2(g) + BO_2(g) \leftrightarrow{} AO_3(g) + BO(g) \] is 16. In a one-litre closed flask, 1 mole each of $ AO_2(g) $, $ BO_2(g) $, $ AO(g) $, and $ BO(g) $ were taken and heated to T(K).
What are the equilibrium concentrations (in mol L$^{-1}$) of $ BO_2(g) $ and $ BO(g) $ respectively?

Observe the following processes:
I. $ O_2(l) \rightarrow O_2(g) $
II. $ N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) $
III. $ C(s, {graphite}) \rightarrow C(s, {diamond}) $
IV. $ N_2(g, 1 \, {atm}) \rightarrow N_2(g, 10 \, {atm}) $
V. $ H_2(g) \rightarrow 2H(g) $
VI. Temperature of a crystalline solid is raised from 0 K to 115 K
For how many of the above processes, change in entropy is negative?

At $T(K)$, the rms velocity of methane is $x \, {ms}^{-1}$. What is the kinetic energy (in J) of 8 g of methane at the same temperature
(Assume methane as an ideal gas)

For a gas, deviation from ideal behaviour is maximum at:

Arrange the following molecules in decreasing order of their dipole moments:
$ {H}_2{O}, {NF}_3, {H}_2{S}, {NH}_3 $

Two statements are given below:
Statement I: Octet theory accounts for the shape of the molecules.
Statement II: Octet theory does not explain the relative stability of the molecules.
The correct answer is:

The first ionization enthalpy (IE$_1$) and second ionization enthalpy (IE$_2$) of Mg(g) are 178 and 348 kcal mol$^{-1}$ respectively. The energy required for the reaction Mg(g) $\rightarrow$ Mg$^{2+}$(g) + 2e$^{-}$ (in kcal mol$^{-1}$) is:

The wavenumber of the first line of the Lyman series of the hydrogen spectrum is equal to the wavenumber of the second line of the Balmer series of $ X^{n+} $ ion. What is $ X^{n+} $?

The $ n_1 $ and $ n_2 $ values for the 3rd line of the Paschen series of the hydrogen spectrum are respectively: