2023 May 12 EAMCET Engineering Forenoon Chemistry Practice Test

This EAMCET Engineering Chemistry Practice Test was a previous year EAMCET exam conducted on 2023 May 12 Shift 1. 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 radius of third orbit of hydrogen atom is R pm. The radius of second orbit of

{He}^{+}

ion (in pm is)

$\frac{4}{3} R$
$\frac{3}{4} R$
$\frac{9}{2} R$
$\frac{2}{9} R$

(2 of 40) The threshold frequency of a metal is

10^{15} s^{- 1}

. The ratio of maximum kinetic energies of the photo electrons, when the metal is made to strike with radiations of frequencies 1.5

\times 10^{15} s^{- 1}

and 2.0

\times 10^{15} s^{- 1}

respectively is

2 : 1
1 : 2
4 : 3
3 : 4

(3 of 40)

Consider the following

I) The order of first ionisation enthalpy of first three elements of

3^{rd}

period is Mg > Al > Na
II) The element with electronegativity of 3.5 is chlorine
III) The order of sizes of ions

{Mg}^{2 +}, {Na}^{+}, F^{-} and O^{2 -} is {Mg}^{2 +} < {Na}^{+} < F^{-} < O^{2 -}

IV) The IUPAC name of the element with atomic number 106 is Bohrium

The correct statements are

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

(4 of 40)

Match the following.

List I (Molecule/ion)	List II (Shape)
A. ${SnCl}_{2}$	I. Trigonal Planar
B. ${NH}_{3}$	II. Linear
C. $I_{3}^{-}$	III. Angular
D. ${SO}_{3}$	IV. Trigonal pyramidal

The correct answer is

A - III, B - I, C - II, D - IV
A - IV, B - III, C - I, D - II
A - III, B - I, C - IV, D - II
A - III, B - IV, C - II, D - I

(5 of 40) In which of the following set of molecules the hybridisation of central atoms is different?

$H_{2} O, {NH}_{3}, {CH}_{4}$
${ClF}_{3}, {XeF}_{2}, {PCl}_{5}$
${CO}_{2}, CO, {BeF}_{2}$
${SF}_{4}, {XeF}_{4}, {CH}_{4}$

(6 of 40) At 300 K and 760 torr pressure, the density of a mixture of He and

O_{2}

gases is 0.543

{gL}^{- 1}

. The mass percent of oxygen approximately is
(R = 0.0821

L atm K^{- 1} {mol}^{- 1}

)

(7 of 40)

The equivalent weight of which of the following is maximum?

(Given atomic weights Na = 23, Mn = 55, Cr = 52, K = 19, O = 16, C = 12)

${Na}_{2} C_{2} O_{4} . 2 H_{2} O$
${KMnO}_{4} | H^{+}$
${KMnO}_{4} | H_{2} O$
$K_{2} {Cr}_{2} O_{7} | H^{+}$

(8 of 40)

If 2.5 moles of an ideal gas at a certain temperature are allowed to expand isothermally and reversibly from an initial volume of 2 ${dm}^{3}$ to 20 ${dm}^{3}$ , the work done by the gas is -16.5 kJ. The temperature (in K) of the gas is (Round off to the nearest value)

(R = 8.314

{JK}^{- 1} {mol}^{- 1}

)

(9 of 40) A solution is prepared by mixing 10 mL of 1.0 M acetic acid and 20 mL of 0.5M sodium acetate and diluted to 100 mL. If the

{pK}_{a}

of acetic acid is 4.76, then the pH of the solution is

4.76
3.76
5.76
9.24

(10 of 40)

Consider the following statements about the hydrides

I) Sodium hydride with water liberates oxygen gas
II) Methane, silane are examples of electron precise hydrides
III) Ammonia and water molecules are examples of electron deficient hydrides
IV) Hydrides of beryllium and magnesium are polymeric in structure

The correct statements are

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

2023 May 12 EAMCET Engineering Forenoon Chemistry Practice Test

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