2023 May 12 EAMCET Engineering Afternoon Chemistry Practice Test

This EAMCET Engineering Chemistry Practice Test was a previous year EAMCET exam conducted on 2023 May 12 Shift 2. This test consists of 40 objective type questions from both Intermediate First Year and Intermediate Second Year Chemistry. The questions are given in the same format as in the exam conducted by Telangana (AP) EAMCET exam in the year 2023.

This test is completely free, and students can attempt as many times as needed and help students in preparing for EAMCET entrance tests and get admissions into various reputed colleges for Engineering in the state of Telangana.

Test Instructions

Quick Test

(1 of 40) The wavelength of second line of Balmer series of hydrogen atom is

λ nm

. What is the wavelength of first line of Lyman series of

{He}^{+} ion

(in nm)?

$\frac{λ}{16}$
$\frac{16}{λ}$
$\frac{16}{3 λ}$
$\frac{3 λ}{16}$

(2 of 40)

Consider the following

I. The electron spin quantum number describes the orientation of the spin of the nucleus with respect to the magnetic field
II. The orbitals represented by the quantum numbers n = 3, l = 2, m = +2 and n = 3, l = 2, m = -2 have the same energy
III. The energy of a photon is directly proportional to wavelength but inversely proportional to wave number
IV. Lyman series of lines appear in ultra-violet region

The correct statements are

II & IV only
I & II only
II, III & IV only
I, III & IV only

(3 of 40) In which of the following options, the elements are correctly arranged with respect to their negative electron gain enthalpies?

P > S > Cl > F
S > P > F > Cl
Cl > F > S > P
F > Cl > P > S

(4 of 40) Identify the option in which the molecules are arranged in the correct order of their dipole moments

${CO}_{2} < H_{2} O < H_{2} S$
$HF < HCl < HBr$
${BF}_{3} < {NF}_{3} < {NH}_{3}$
${CH}_{4} < {CHCl}_{3} < {CCl}_{4}$

(5 of 40) The bond order of

O_{2}^{+}

is x. The bond orders of

O_{2}^{-}

and

O_{2}^{2 +}

are respectively

$\frac{5}{3} x, \frac{5}{6} x$
$\frac{3}{5} x, \frac{6}{5} x$
$\frac{2}{5} x, \frac{3}{5} x$
$\frac{5}{2} x, \frac{5}{3} x$

(6 of 40) Certain volume of oxygen gas diffuses through a porous pot in 20 seconds. Same volume of another gas (X) diffuses in Y seconds as that of oxygen, then (X) and Y respectively are

$H_{2}$ , 5
He, 10
CO, 30
${CO}_{2}$ , 40

(7 of 40) Which of the following is only a redox reaction but not a disproportionation reaction?

$4 H_{3} {PO}_{3} \to 3 H_{3} {PO}_{4} + {PH}_{3}$
$2 H_{2} O_{2} \to 2 H_{2} O + O_{2}$
$P_{4} + 3 NaOH + 3 H_{2} O \to 3 {NaH}_{2} {PO}_{2} + {PH}_{3}$
$P_{4} + 8 {SOCl}_{2} \to 4 {PCl}_{3} + 2 S_{2} {Cl}_{2} + 4 {SO}_{2}$

(8 of 40) The enthalpies of formation of gaseous

N_{2} O

and

NO

at 298 K are 82.0 and

90.0 KJ {mol}^{- 1}

respectively. The enthalpy change of the reaction

N_{2} O (g) + \frac{1}{2} O_{2} (g) \to 2 NO (g)

- 74 kJ
+ 98 kJ
+ 89 kJ
- 47 kJ

(9 of 40) At 780 K and 10 atmosphere pressure the equilibrium constant for the reaction

2 A (g) ⇌ B (g) + C (g)

is 3.52. At the same temperature and 7.04 atmosphere pressure, the equilibrium constant for the same reaction is

7.04
3.52
10.56
5.23

(10 of 40) The chemical name of calgon is

Sodium hexametaphosphite
Potassium hexametaphosphate
Calcium hexametaphosphate
Sodium hexametaphosphate

2023 May 12 EAMCET Engineering Afternoon Chemistry Practice Test

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