List of top Chemistry Questions asked in AP EAMCET

At 27 °C, the pH of 1 L of aqueous copper sulfate is 5.5. This solution was electrolyzed using two Pt electrodes for some time. What is the pH of remaining copper sulfate solution?
The molar depression constant of water (\(K_f\)) is 1.86 K kg mol\(^{-1}\). What is the approximate \( \Delta H_{fus} \) (in kJ mol\(^{-1}\)) of water if it freezes at 273 K?
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 \(i = 2.5\), \(R = 0.082 \, \text{L atm mol}^{-1} \text{K}^{-1}\))
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) \[ (N_A = 6 \times 10^{23} { mol}^{-1}) \]

The number of \(\sigma\) bonds, \(\pi\)-bonds, and lone pairs of electrons present in the product Z in the given reaction sequence are respectively: 

\( x \) 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%?

Identify the non-biodegradable wastes from the following:

[I.] Thermal power plants which produce fly ash

[II.] Wastes generated by cotton mills

[III.] Wastes produced by food processing units

[IV.] Slag produced from blast furnace

Identify the correct statements about group 14 elements: 
I. Sn in +2 state is a reducing agent and Pb in +4 state is a strong oxidising agent. 
II. Thermodynamically most stable allotrope of carbon is diamond. 
III. SiCl\(_4\) on hydrolysis gives silicic acid. 
IV. Sn has a higher melting point than Pb.

The first order reaction \( A(g) \rightarrow B(g) + 2C(g) \) occurs at 25\(^\circ\)C. After 24 minutes the ratio of the concentration of products to the concentration of the reactant is 1:3. What is the half-life of the reaction (in min)? (log 1.11 = 0.046)
Which of the following has maximum coagulating power in the coagulation of positively charged sol?
Identify the autocatalytic reaction from the following:
The anode and cathode used in electrolytic refining of copper respectively are:

The hybridization of aluminum in the complexes X and Y respectively is: 

Identify the products formed when zinc reacts with sodium hydroxide solution. Options:

The spin-only magnetic moments of the complexes \([Mn(CN)_6]^{3-}\) and \([Co(C_2O_4)_3]^{3-}\) are respectively:

What happens when \( \mathrm{H_2O_2} \) is added to an aqueous solution of ferrous sulphate in an acidic medium?
40 mL of 0.2 M \( \mathrm{CH_3COOH} \) is titrated with 0.2 M NaOH solution. How many mL of NaOH should be added to form a buffer solution with maximum buffer capacity?
PHBV is a biodegradable polymer of two monomers X and Y. X and Y respectively are:
The carbohydrate which does not react with ammoniacal \( AgNO_3 \) solution is:
At T(K), 3 moles of ethyl alcohol is mixed with 3 moles of acetic acid in a 1L vessel. At equilibrium, 2 moles of ester are formed. Calculate the equilibrium constant for the 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.
Consider the reaction: \(C_2H_5Cl(g) \rightarrow 2C(g) + 5H(g) + Cl(g)\), where \(\Delta H = 3047 \, {kJ mol}^{-1}\). The bond dissociation enthalpy (\(\Delta_{{bond}} H\)) values of C–Cl and C=C bonds are 431 and 414 kJ mol\(^{-1}\), respectively. What is the average bond enthalpy of C–H in kJ mol\(^{-1}\)?

The structure given below represents:

Identify the Swarts reaction from the following:
Which of the following reactions is not a metal displacement reaction?