List of top Questions asked in AP ECET

The exhausted anion-exchange resin is regenerated with
Which of the following is a weak electrolyte?
The wrong statement regarding Galvanic cell is
Electrolysis of an aqueous solution of \(Na_2SO_4\) between Pt electrodes liberates a gas \(X\) at anode and gas \(Y\) at cathode. \(X\) and \(Y\) respectively are
According to Arrhenius theory of acids and bases, which of the following is an example of Arrhenius base?
\(100\ \text{mL}\) of \(0.1M\ HCl\) and \(100\ \text{mL}\) of \(0.05M\ H_2SO_4\) are mixed and the solution is diluted to \(2.0\ L\) by adding water. The pH of the resulting solution is
Identify the pair of gases which have same number of molecules at S.T.P.?
Which of the following has highest equivalent weight? Given: At.wt \(H=1,\ C=12,\ O=16,\ S=32,\ Na=23,\ Ca=40\)
\(12.6\ \text{g}\) of oxalic acid, \(H_2C_2O_4\cdot 2H_2O\) \((\text{M.wt. }126)\), is present in \(1500\ \text{mL}\) of solution. The normality of that solution is
Which one of the following statements is not correct?
In which of the following, the number of bonding electrons and non-bonding electrons are in \(3:2\) ratio?
The four quantum numbers for the electron in the outermost orbital of potassium \((Z=19)\) are
The angular momentum of an electron in an orbit \(X\) of hydrogen atom is \(\frac{2h}{\pi}\). Maximum number of orbitals possible in \(X\) is
The pair of orbitals with electron density maximum along the axes is
In a superconducting ring, a persistent current has been flowing without decay for years. This is possible because
In Optical Fiber communication, the signal is transmitted in the form of
In a photoelectric experiment, the stopping potential for incident light of wavelength \(4000\ \text{\AA}\) is \(2\ \text{V}\). If the wavelength is changed to \(3000\ \text{\AA}\), the new stopping potential will be approximately \[ (\text{Use }h=4.14\times 10^{-15}\ \text{eV s},\ c=3\times 10^8\ \text{m/s}) \]
The R.M.S. speed of oxygen molecules at \(27^\circ\text{C}\) is \(v\). At \(927^\circ\text{C}\), its R.M.S. speed will be
A bubble of an ideal gas rises from the bottom of a lake to the surface. At the bottom, the pressure is \(3\ \text{atm}\) and the temperature is \(7^\circ\text{C}\). At the surface, the pressure is \(1\ \text{atm}\) and the temperature is \(27^\circ\text{C}\). If the initial volume of the bubble was \(V_0\), what is its volume \(V\) at the surface?
At constant temperature, the product \(PV\) is plotted against pressure \(P\) for an ideal gas. The graph obtained is
If the pressure of an ideal gas is doubled and its absolute temperature is halved, the volume will become
In an isothermal process
In a closed hall of volume \(5000\ \text{m}^3\), the total absorption of the interior surfaces is \(200\) metric sabin. The reverberation time is
If the volume of a room is doubled and the total absorption is halved, the reverberation time will
In acoustics, “Noise” is generally characterized by