List of top Questions asked in AP ECET Chemical Engg

Tarnishing of silver is due to formation of
The cell formed in bent pipes is an example of
Identify the pair of chlorides responsible for permanent hardness of water.
What is the degree of hardness in ppm of a sample containing \(19\) mg of \(MgCl_2\) \((\text{Molecular Weight}=95)\) in \(2\) kg water sample? Express it in terms of equivalents of \(CaCO_3\).
In the removal of permanent hardness of water by permutit process, \(Na^+\) ions of permutit are exchanged with which ions of water?
The standard electrode potentials of Zn, Ag and Cu are \(-0.76\), \(+0.80\) and \(+0.34\) V respectively. Identify the correct statement from the following.
The amount of silver in mg deposited when \(9.65\) coulombs of electricity is passed through an aqueous solution of silver nitrate is \((Ag=108\,u,\ 1F=96500\,C\,mol^{-1})\)
Aqueous solution of which of the following does not act as electrolyte?
Number of coulombs corresponding to \(1\) mol of electrons approximately is equal to
\(4\) g of NaOH is dissolved in \(1.0\) L solution. The pH of solution is
Identify the pair containing only Lewis acids.
\(3\times 10^{22}\) molecules of \(Na_2CO_3\) \((\text{molecular weight}=106)\) are present in \(500\) ml of solution. The normality of the solution formed is \((N_A=6\times 10^{23}\,mol^{-1})\)
\(x\) ml of \(0.1\,M\) NaOH solution is diluted with distilled water to get \(250\) ml of \(0.01\,M\) solution. The value of \(x\) in ml is
How many moles of urea is present in \(250\) ml of \(0.2\,M\) solution of it?
In which of the molecules is the lone pair : bond pair of electrons ratio \(2:3\)?
Consider the elements with atomic numbers \(Z=8,9,11,19\) and \(20\). The number of ionic compounds possible with the elements having these atomic numbers is
If \(n,l,m\) and \(s\) represent the symbols of quantum numbers, the impossible quantum number set for the electron in terms of \(n,l,m\) and \(s\) respectively is
The number of orbitals present in \(d\)-subshell is
The de Broglie wavelength associated with a particle of momentum \(p\) is
The phenomenon responsible for the formation of mirage is
An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of
A bubble rises from the bottom of a lake \(90\) m deep. On reaching the surface, its volume becomes \((\text{Atmospheric pressure is }10\text{ m of water})\)
A sealed glass jar is full of water. When its temperature is decreased to \(0^\circ C\),
A vessel containing \(10\) liters of an ideal gas at a pressure of \(760\) mm of Hg is connected to an evacuated \(9\) liter vessel. The resultant pressure is
A gas is compressed at a constant pressure of \(50\,N/m^2\) from a volume of \(10\,m^3\) to a volume of \(4\,m^3\). Energy of \(100\,J\) is then added to the gas by heating. Its internal energy is