List of top Questions asked in AP ECET

Greenhouse effect is caused by
Which compound is mainly responsible for the depletion of ozone layer?
In the removal of permanent hardness of water by permutit process, \(Na^+\) ions of permutit are exchanged with which ions of water?
What is the degree of hardness in ppm of a sample containing \(19\text{ mg}\) of \(MgCl_2\) molecular weight \(=95\) in \(2\text{ kg}\) water sample? Express it in terms of equivalents of \(CaCO_3\).
Identify the pair of chlorides responsible for permanent hardness of water.
Which of the following is not a co-polymer?
The cell formed in bent pipes is an example of
Tarnishing of silver is due to formation of
The amount of silver in mg deposited when \(9.65\) coulombs of electricity is passed through an aqueous solution of silver nitrate is \(\left(Ag=108u,\ 1F=96500\text{ C mol}^{-1}\right)\)
The standard electrode potentials of Zn, Ag and Cu are \(-0.76\), \(+0.80\) and \(+0.34\text{ V}\) respectively. Identify the correct statement from the following.
\(3\times10^{22}\) molecules of \(Na_2CO_3\) molecular weight \(=106\) present in \(500\text{ ml}\) of solution. The normality of the solution formed is \(\left(N=6\times10^{23}\text{ mol}^{-1}\right)\)
Identify the pair containing only Lewis acids.
\(4\text{ g}\) of NaOH is dissolved in \(1.0\text{ L}\) solution. The pH of solution is
Aqueous solution of which of the following does not act as electrolyte?
Number of coulombs corresponding to \(1\text{ mol}\) of electrons approximately is equal to
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
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
In which of the molecules lone pair, bond pair of electrons ratio is \(2:3\)?
How many moles of urea is present in \(250\text{ ml}\) of \(0.2M\) solution of it?
\(x\text{ ml}\) of \(0.1M\) NaOH solution is diluted with distilled water to get \(250\text{ ml}\) of \(0.01M\) solution. The value of \(x\) in ml is
Identify the orbital which has lobes not orienting on the axis
A vessel containing \(10\) liters of an ideal gas at a pressure of \(760\text{ mm of Hg}\) is connected to an evacuated \(9\) liter vessel. The resultant pressure is
A bubble rises from the bottom of a lake \(90\text{ m}\) deep. On reaching the surface, its volume becomes \((\text{Atmospheric pressure is }10\text{ m of water})\)
Consider the elements with atomic numbers \(Z=1\) to \(Z=20\). The number of elements with only one unpaired electron in their ground state is
A sealed glass jar is full of water. When its temperature is decreased to \(0^\circ\text{C}\)