List of top Chemistry Questions asked in AP EAPCET

Ca\(^{2+}\) + Na\(_6\)(PO\(_3\))\(_6\) → X + yNa\(^+\). Identify X

How many litres of O\(_2\) at 273 K and 1 atm pressure can give 20 L of CO in the following reaction?
\[ C + O_2 \rightarrow CO_2 \rightarrow CO \]

Combustion of 1 mole graphite releases \(2.48 \times 10^2\) kJ of energy. What will be the temperature of a bomb calorimeter if 1 g of graphite is burnt at 298 K, given heat capacity = 10.35 kJ/K?

Cp of a gas is 20 J mol\(^{-1}\) K\(^{-1}\). If one mole of the gas is cooled from 298 K to 258 K at constant pressure, calculate the internal energy change of the system. (R = 8.3 J mol\(^{-1}\) K\(^{-1}\))

The period number and group number of platinum in the long form of periodic table are respectively:

3.68 g of hydrogen at 17°C occupies the same volume as 58.0 g of another gas X at 95°C. The molar mass of gas X is (g mol\(^{-1}\)):

100 g of a hydrocarbon \(C_xH_y\) is completely burnt to produce 130 g of \(H_2O\). The produced carbon dioxide can use 228.56 g of \(O_2\) via photosynthesis. What is the molecular formula of the hydrocarbon?

Group – 2 element (A) when reacts with group – 15 element (X), the general formula of the compound formed is:

Identify the group number of the element X which has 1.44 % more neutrons than protons (Mass number of X is 127):

The bond order of peroxide ion is x. The bond order of superoxide ion is:

A radiation of energy 11.0 eV is irradiated on gaseous hydrogen atoms at room temperature. Identify the energy level to which electron of hydrogen atom can be excited:

The phenomenon of removal of electrons from a metal surface when it is made to strike with radiation of suitable frequency is called:

Identify the major products P and Q from the following set of reaction sequences:

The shortest wavelength in the Lyman series of hydrogen \([R_H = 1.097 \times 10^7~\text{m}^{-1}]\) is:

The incorrect statement among the following is (I = Intensity of incident radiation, f = frequency of incident radiation):

If a water drop of radius 2 cm breaks into \(10^9\) drops of equal size, the work done is about:
(Surface tension of water is \(72 \times 10^{-3}\) N/m)

The scientist whose major contribution is towards the measurement of electronic charge

Propanoic acid exists as dimer in which of the following:
(a) Vapour phase (b) Aqueous solvent (c) Aprotic solvent

Which of the following gives Carbylamine test?

Choose the correct statement:

One mole of a yellow coloured complex CoCl\(_3\cdot\)6NH\(_3\) gave three moles of AgCl on reaction with an excess of AgNO\(_3\). The conductivity of the solution of the complex is due to:

Identify the major product formed in the following reaction:

Decreasing order of acidic strength for the following is:

Which among the following readily participate in \(S_N2\) reaction?

Assertion (A): The stability of Cu\(^ {2+}\) ions is less than Cu\(^+\) in their aqueous solution.
Reason (R): Aqueous Cu\(^ {2+}\) has more negative \(\Delta_{hyd}H^0\) than Cu\(^+\).