TS EAMCET Chemistry 2025 Most Expected Questions

1.

How many asymmetric carbons are present in the following molecule?

HOH _₂ CCH(Br)CH(Br)CH₂OH

(a) 3

(b) 1

(c) 4

(d) 2

2

An element with molar mass 2.7 x 10-2 kg mol-¹ forms a cubic unit cell with edge length of 405 pm. If its density is 2.7 x 10 kg m³, the number of atoms present in one unit cell of it is (Given: N=6.023 × 1023 mol-1)

(a) 2

(b) 4

(c) 6

(d) 12

3.

Least reactive alkyl chloride in a SN2 reaction is ____

(a) 1-Chloro butane

(b) Chloro 2-Methyl propane

(c) 2-Chloro 2-Methyl propane

(d) 2-Chloro butane

4.

In SN ₂ reaction, the carbon in the transition state is

(a)Tri coordinated

(b) Penta coordinated

(c) Tetra coordinated

(d) Hexa coordinated

5.

In the x-ray reflection (n=1), the distance between two parallel planes of NaCl is 280 pm and the diffraction angle is 5.2°. What is the wavelength of its light radiation (Sin 5.2° = 0.09)

(a) 0.504 A°

(b) 5.04 A°

(c) 50.4 A

(d) 504 A°

6.

The optically inactive compound from the following is ____

(a) 2-Bromopropanal

(b) 3-Bromopropanal

(c) 3-Bromo 2-iodopropanal

(d) 2-Bromo 3-indopropanal

7.

A compound is formed by atoms of A, B and C. Atoms of C form a hep lattice. Atoms of A occupy 50% of octahedral voids and atoms of B occupy ⅔ rd of tetrahedral voids. What is the molecular formula of the solid?

(a) A ₃ B ₈ C ₆

(b) A₂ B ₈ C ₆

(c) AB ₄ C ₃

(d) A ₅ B ₈ C ₆

8.

At 300 K, 6 g of urea was dissolved in 500 mL of water. What is the osmotic pressure (in atm) of the resultant solution?

(R=0.0821 atm K-¹ mol-¹)

(C=12; NO = 16; H=1)

(a) 0.492

(b) 2.46

(c) 4.92

(d) 49.2

9.

Identify the halogen exchange reaction from the following

(a) Sandmeyer reaction

(b) Swarts reaction

(c) Stephens reaction

(d) Wurtz reaction

10.

The ΔT _b value for 0.01 m KCI solution is 0.01 K. What is the van't Hoff factor?

(K for water = 0.52 K kg mol-¹)

(a) 1.92

(b) 1.72

(c) 0.96

(d) 0.86

11.

In bee lattice containing X and Y type of atoms, X type of atoms are present at the corners and Y type of atoms are present at the centers. In its unit cell, if three atoms are missing in the corners, the formula of the compound is

(a) X ₅ Y ₈

(b) X ₈ Y ₅

(c) X ₃ Y ₅

(d) X ₅ Y ₃

12.

At T(K), 0.1 moles of a non-volatile solute was dissolved in 0. 9 moles of a volatile solvent. The vapour pressure of the solvent is 0.9 bar. What is the vapour pressure (in bar) of solution?

(a) 0.89

(b) 0.81

(c) 0.79

(d) 0.71

13.

Dry air contains 79% N, and 21% O2. At T(K), if Henry's aw constants for N, and O, in water are 8.57 × 10^4 atm add 4.56 x 10^4atm, the ratio of mole fractions of N2, and O2 dissolved in water at 1 atm is

(a) 4:1

(b) 1:4

(c) 2:1

(d) 1:2

14.

The molecular formula of a compound is AB₂O. Atoms 4 of O form a cep lattice. Atoms of A (cation) occupy ⅛ th of tetrahedral voids. Atoms of B (cation) occupy a fraction of octahedral voids. What is the fraction of vacant octahedral voids?

(a) ¾

(b) ¼

(c)⅓

(d) ½

15.

At T (K) for one mole of an ideal gas, the graph of P (on y-axis) and V-1 (on x-axis) gives a straight line with pe of 32.8 L atm mol-1. What is the temperature (in K)?

(R = 0.082 L atm mol-1 -K-1)

(a) 600

(b) 200

(c) 800

(d) 400

16.

The molecular formula of a crystalline solid is X ₃ Y ₂ . Atoms of Y form cep lattice, and atoms of X occupy 50% octahedral voids and x% of tetrahedral voids. What is the percentage of unoccupied tetrahedral voids?

(a) 66.6

(b) 25

(c) 50

(d) 33.3

17.

At STP, a closed vessel contains I mole each of He and CH. Through a small hole, 2L of He and IL of CH, escaped from the vessel in '' minutes. What are the mole fractions of He and CH, respectively remaining in the vessel? (Assume He and CH, as ideal gases. At STP one mole of an ideal gas occupies 22.4 L of volume)

(a) 0.512, 0.488

(b) 0.5, 0.5

(c) 0.329, 0.671

(d) 0.488, 0.512

18.

The mass % of the urea solution is 6. The total weight of the Kolution is 1000 g. What is its concentration in mol L-¹? (density of water = 1.0 g mL-¹)

(C=12u, N=14u, O=16u, H=1u)

(a) 1.5

(b) 1.064

(c) 1.12

(d) 0.80

19.

Identify the pair of elements with the highest and lowest 'electronegativity respectively

(a) K and Pb

(b) I and F

(c) F and Fr

(d) Fr and Li

20.

100 mL of M/10 Ca (NO₂), and 200 mL of M/10 KNO ₃ , solutions are mixed. What is the normality of the resulting solution with respect to NO ₃ -?

(a) 0.1 N

(b) 0.2 N

(c) 0.13 N

(d) 0.066 N