List of top Chemistry Questions asked in TS EAMCET

What is the energy (in J) required to transfer the electron from $ n = 1 $ to $ n = 2 $ state in $ \text{Li}^{2+} $? (K = constant $ 2.18 \times 10^{-18} $ J)

Two statements are given below: Statement I: In H atom, the energy of 2s and 2p orbitals is the same.
Statement II: In He atom, the energy of 2s and 2p orbitals is the same.

An element with molar mass $ 2.7 \times 10^{-2} $ kg mol$^{-1}$ forms a cubic unit cell with an edge length of 405 pm. If its density is $ 2.7 \times 10^3 $ kg m$^{-3}$, the number of atoms present in one unit cell is: (Given: $ N_A = 6.023 \times 10^{23} $ mol$^{-1}$)

Match the following substances with their respective equivalent weights:

Which one of the following is not an example of a condensation polymer?

(1) Terylene
(2) Nylon 6,6
(3) Bakelite
(4) Polystyrene

Observe the following reaction: \[ 2KClO_3 (s) \xrightarrow{\Delta} 2KCl (s) + 3O_2 (g) \] In this reaction:

Identify the structure of the polymer ‘P’ formed in the given reaction:

Identify the sets containing isostructural molecules from the following

I. $\text{SiF}_4$, $\text{SF}_4$
II. $\text{IO}_3^-$, $\text{XeO}_3$
III. $\text{BH}_4^-$, $\text{NH}_4^+$
IV, $\text{PF}_6^-$, $\text{SF}_6$
The correct option is

Carbon on reaction with hot conc. $ H_2SO_4 $, gives two oxides along with $ H_2O $. What is the nature of these two oxides?

Identify the correct statements from the following:
I. $\text{In}_2\text{O}_3$ is a basic oxide.
II. $\text{TiCl}_2$ is more ionic in nature than $\text{TiCl}_3$.
III. Boron reacts with dinitrogen at high temperature to form BN.

Observe the following formula

The groups/atoms in the plane of the paper are

The oxide of nitrogen, 'X' is a blue solid and is acidic in nature. $ X $ is

The reagent 'X' used in the following reaction to obtain a good yield of the product is:

Which radical is responsible for depletion of ozone in stratosphere?

The IUPAC names of the compounds A and B respectively are

In the following reaction sequence X and Y respectively are

Observe the following statements
Statement I : Ca(OH)$_2$; is used in white wash
Statement 11 : $CaCO_3$ is used as mild abrasive in tooth paste

If the density of a mixture of nitrogen and oxygen gases at 400 K and 1 atm pressure is 0.920 g L$^{-1}$, what is the mole fraction of nitrogen in the mixture?

Formic acid on heating with concentrated H$_2$SO$_4$ at 373 K gives X, a colourless substance and Y, a good reducing agent. The number of $\sigma$ and $\pi$ bonds in X, Y are respectively:

Match the following: List I (Ore) List II (Composition)

Arrange the following halides in decreasing order of their reactivity towards dehydrohalogenation:

The number average molecular weight (M$_n$) of a polymer is 1500. In this polymer, 800 molecules of molar mass 1000, 100 molecules of molar mass 2000 and x molecules of molar mass 5000 are present. What is the value of x?

Which of the following does not exist?

Identify the element for which $ +1 $ oxidation state is more stable than $ +3 $ oxidation state.

A few sols are given below:
As₂S₃ sol, starch sol, Al₂O₃ ·
xH₂O sol, TiO₂ sol, gold sol, congo red sol, blood, methylene blue sol, CdS sol
The number of positively charged sols in the above list is: