List of top Chemistry Questions asked in AP EAMCET

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


 

The product of Finkelstein reaction X, is not used in which of the following named reaction?
In the ground state of hydrogen atom, electron absorbs 1.5 times energy than the minimum energy \( (2.18 \times 10^{-18} J)\) to escape from the atom. The wavelength of the emitted electron (in m) is \((m_e = 9 \times 10^{-31} kg)\)
Which of the following is insoluble in water?
If the first ionisation enthalpy of Li, Be and C respectively are 520, 899, 1086 kJ/mol, the first ionisation enthalpy (in kJ/mol) of B will be
In which of the following sets of molecules, the central atoms of molecules have same hybridisation?

Which of the following represents double stranded helix structure of DNA?

The correct increasing order of number of lone pair of electrons on the central atom of \(SnCl_2\), \(XeF_2\),\( CIF_3\) and \( SO_3\) is

Identify the correct statements from the following:

For an ideal gas, the compressibility factor is 1.0.

The kinetic energy of NO (g) (molar mass = 30 g mol-1) at T(K) is \( x \) J mol-1. The kinetic energy of N2O4 (g) (molar mass = 92 g mol-1) at T(K) is \( 2x \) J mol-1.

The rate of diffusion of a gas is inversely proportional to the square root of its density.

 

The following graph is obtained for a gas at different temperatures (T1, T2, T3). What is the correct order of temperature? (x-axis = velocity; y-axis = number of molecules)

Observe the following stoichiometric equation
P4 + 3 OH- + 3 H2O → PH3 + 3 OH-.
What is the conjugate acid of OH- ?

Which of the following molecules is not having glycosidic linkage?
Which of the following polymer used in the manufacture of paints and lacquers?
[Ni(H\(_2\)O)\(_4\)]\(^{2+}\) on reaction with ethane-1,2-diamine forms violet color complex. Its formula and magnetic property respectively are

Identify the correct statement from the following: 
UK 'copper' coins are Cu/Ni alloy. AgBr has special light-sensitive properties. Ti\(^{2+}\), V\(^{2+}\), Cr\(^{2+}\) are strong oxidising agents. The magnetic moment of V\(^{2+}\) is 2.84 BM.

Which of the following reactions is not correct with respect to products formed?
Given below are two statements
Statement - I: For isothermal irreversible change of an ideal gas, \[ q = -w = P_{\text{ext}}(V_{\text{final}} - V_{\text{initial}}) \] Statement - II: For adiabatic change, \[ \Delta U = W_{\text{adiabatic}} \] The correct answer is:

A thermodynamic process (B \(\rightarrow\) E) was completed as shown below. The work done is equal to area under the limits. 

In a one litre flask, 2 moles of \( A_2 \) was heated to \( T(K) \) and the above equilibrium is reached. The concentrations at equilibrium of \( A_2 \) and \( B_2 \) are \( C_1(A_2) \) and \( C_2(B_2) \) respectively. Now, one mole of \( A_2 \) was added to flask and heated to \( T(K) \) to establish the equilibrium again. The concentrations of \( A_2 \) and \( B_2 \) are \( C_3(A_2) \) and \( C_4(B_2) \) respectively. What is the value of \( C_3(A_2) \) in mol L\(^{-1}\)? 

The correct statements regarding Hall-Héroult process are:
  • [i.] Steel vessel with lining of carbon acts as anode.
  • [ii.] Purified Al\(_2\)O\(_3\) is mixed with cryolite.
  • [iii.] The overall reaction is \( 2\text{Al}_2\text{O}_3 + 3\text{C} \rightarrow 4\text{Al} + 3\text{CO}_2 \).

The correct statements among the following are: 

i. Saline hydrides produce \( \text{H}_2 \) gas when reacted with water. 
ii. Presently ~77% of the industrial dihydrogen is produced from coal. 
iii. Commercially marketed \( \text{H}_2 \text{O}_2 \) contains 3% \( \text{H}_2 \text{O}_2 \).

The Tyndall effect is observed only when the following conditions are satisfied:

  • (A) The diameter of the dispersed particle is much smaller than the wavelength of the light used.
  • (B) The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
  • (C) The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.
  • (D) The refractive indices of the dispersed phase and the dispersion medium are almost similar in magnitude.

Identify the correct statements from the following:

Oxidation of NaBH_4 with \(I_2\) gives \(B_2H_6\)
(ii) \(B_2H_6\) burns in oxygen and releases an enormous amount of energy 
(iii) \(B_2H_6\) on hydrolysis gives a tribasic acid

Which of the following is not correct about the adsorption?
A \(\rightarrow\) P is a first-order reaction. At 27°C, the time taken for the completion of 20% of the reaction is \( t_1 \) min. The time taken for the completion of 80% of the reaction is \( t_2 \) min at the same temperature. What is the value of \( \frac{t_2}{t_1} \)?