List of top Questions asked in AP ECET EIE- 2025

The direction of rotation of a DC motor can be determined by
The basic function of a transformer is to change
The monomer of Teflon is X. The number of fluorine atoms in X is
Bakelite is an example of
Which of the following is NOT regarded as a primary fuel?
pH of acid rain water is generally in the range of
Rust is chemically
Exhausted permutit is regenerated by washing with
If the standard reduction potentials of A, B, C are respectively $0.68\text{V}$, $-2.54\text{V}$ and $-0.50\text{V}$, then the order of their reducing power is
$27.2$ mg of $CaSO_4$ and $2.4$ mg of $MgSO_4$ are present in a $2$ kg water sample. What is the total hardness of water (in ppm) in terms of equivalents of $CaCO_3$? (molecular weight of $CaSO_4 = 136$ & molecular weight of $MgSO_4 = 120$)
With which of the following anions, $Mg^{2+}$ and $Ca^{2+}$ ions form salts responsible for permanent hardness of water?
Statement I: The lower the pH greater is the corrosion.
Statement II: Electrochemical Corrosion always occurs at the anodic area.
A current of $0.5\text{ amp}$ is passed through molten $AlCl_3$ for $96.5\text{ seconds}$. The volume of $Cl_2$ gas liberated at STP at anode (in ml) is ($Cl = 35.5\text{ u}$) ($1F = 96500 \text{ C mol}^{-1}$)
Which of the following combinations give a buffer solution?
At $25^\circ\text{C}$, ionic product ($K_w$) of $0.01\text{M HCl}$ solution is
The amount of substance deposited due to passage of $1\text{F}$ of electricity is called
What is the emf of the cell? $Sn|Sn^{2+} (1\text{M}) || Ag^+ (1\text{M}) | Ag$ [Given $E^0_{Sn^{2+}/Sn} = -0.14\text{V}$ and $E^0_{Ag^+/Ag} = +0.80\text{V}$]
The equivalent weight of which of the following is the highest?
In the elements with atomic number $Z=1$ to $Z=20$, how many of them have no unpaired electrons in their ground state?
Which of the following is not a property of covalent compounds?
The sum of covalent bonds in $H_2$, $N_2$ and $HCl$ is
How many grams of $NaOH$ is required to prepare $5.0$ litre of $0.1\text{ N}$ solution? (Given: At. wt: $H=1$, $O=16$, $Na=23$)
A gaseous mixture contains $8\text{ g}$ of oxygen, $14\text{ g}$ of nitrogen and $8\text{ g}$ of hydrogen. Total number of molecules present in the gaseous mixture is (Given: At. wt: $H=1$, $N=14$, $O=16$, $N_A = 6 \times 10^{23} \text{ mol}^{-1}$)
A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperature and volume of this process is $TV^x = \text{constant}$. Then $x$ is
A carnot engine having an efficiency of $\frac{1}{10}$ as heat engine, is used as a refrigerator. If the work done on the system is $10 \text{ J}$, the amount of energy absorbed from the reservoir at lower temperature is