List of top Chemistry Questions asked in AP EAMCET

In the disproportionation reaction of nitrous acid, X is formed along with nitric acid and water. X can also be obtained by the reaction of:
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

The \( n_1 \) and \( n_2 \) values for the 3rd line of the Paschen series of the hydrogen spectrum are respectively:
Which of the following is present in the photochemical smog?

Match the following: 



 

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 \( X^{n+} \)?

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: 
 

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

Amino acids are represented by the following general structure: 

Find out the pair in which amino acid is correctly matched with its group R: 
 

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) 
 

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


 

Consider the following statements:
Statement I: The entropy of pure crystalline solid approaches zero as the temperature approaches absolute zero value.
Statement II: For a reaction at equilibrium, \(\Delta G\) is zero.
At 27 °C, \(x \, g\) of \( \text{CaCl}_2 \) was dissolved in 2.5 L of water. The osmotic pressure of the resultant solution is 0.82 atm. What is \(x\) in grams? (Given \(i = 2.5\), \(R = 0.082 \, \text{L atm mol}^{-1} \text{K}^{-1}\))
Which of the following reactions is not correct with respect to products formed?
The number of unit cells present in 5.85 g of a cube-shaped crystal of sodium chloride is \( x \times 10^y \). \( x \) and \( y \) respectively are (Na = 23 u, Cl = 35.5 u) \[ (N_A = 6 \times 10^{23} { mol}^{-1}) \]
[Ni(H\(_2\)O)\(_4\)]\(^{2+}\) on reaction with ethane-1,2-diamine forms violet color complex. Its formula and magnetic property respectively are
\( x \) g of an organic compound was analysed by Kjeldahl’s method for the estimation of nitrogen. The ammonia gas evolved from the compound was passed into 100 mL of 0.2 M H\(_2\)SO\(_4\). The excess of acid required 40 mL of 0.5 M NaOH solution for complete neutralisation. What is \( x \) when the percentage of nitrogen in it is 46%?
At \( T(K) \), in a closed vessel, a gas obeying the kinetic theory of gases has two molecules. The kinetic energy of these molecules is \( x_1 \) J and \( x_2 \) J respectively. After a few collisions, their kinetic energy is \( y_1 \) J and \( y_2 \) J respectively. Identify the correct relationship/s:

(1) \( x_1 = y_1 \)

(2) \( \frac{x_1 + x_2}{2} = \frac{y_1 + y_2}{2} \)

(3) \( x_2 = y_2 \)

(4) \( (x_1 - x_2)^2 = (y_1 - y_2)^2 \)

Which of the following is insoluble in water?
The product of Finkelstein reaction X, is not used in which of the following named reaction?

What are X, Y and Z in the given reaction sequence?


 

Cumene on oxidation in the presence of air gives a compound X. This in the presence of dilute acid gives Y and Z. The total number of \( sp^2 \) carbons in Y and Z is:

What are the reagents X and Y respectively used in the following reaction sequence to convert a nitrile to a methyl group? 


 

Identify Z in the following reaction sequence. 


 

Aniline on direct nitration at 288 K gives 51% (A), 47% (B) and 2% (C). ‘B’ on diazotisation, followed by reaction with CuCN | KCN gives a compound X. The percentage of nitrogen in X is: