List of top Questions asked in AP ECET CSE- 2025

If \(\sin 5x + \sin 3x + \sin x = 0\) then the value of x other than zero lying between \(0 \le x \le \frac{\pi}{2}\) is

Which compound is mainly responsible for the depletion of ozone layer?

Greenhouse effect is caused by

Liquefied petroleum gas (LPG) mainly contains

We can overcome the undesirable properties of natural rubber by heating natural rubber with

The monomer involved in the formation of polystyrene is

Which of the following is not a co-polymer?

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\(_2\) (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 x 10\(^{22}\) molecules of Na\(_2\)CO\(_3\) (molecular weight = 106) present in 500 ml of solution. The normality of the solution formed is (N = 6 x 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 lone pair, bond pair of electrons ratio is 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

Identify the orbital which has lobes not orienting on the axis