BPSC Chemistry Lecturer Past Papers

BPSC chemistry lecturer past papers mcqs for preparation of chemistry subject specialist test in Balochistan.

BPSC Chemistry Lecturer Past Papers MCQs

In the infrared spectrum of the carboxylic acid group, the C=O bond shows the peak-shaped band at the range of?

1. 1510 cm⁻¹
2. 1710 cm⁻¹
3. 2010 cm⁻¹
4. 2800 cm⁻¹

Which of the following process explain the process of tautomerism?

1. CH3COOH + C2H5OH ⇌ CH3COOC2H5 + H2O
2. N2 + 3H2 ⇌ 2NH3
3. 2SO2 + O2 ⇌2SO3
4. None

Which substances are synthesized when ultraviolet radiations reaction with (CFCs) Chlorofluorocarbons and they result in the breakdown of ozone layer?

1. Cl° and C° F2Cl
2. Cl° and O°
3. Cl2CF° and C° l
4. C° lO + F°

“Anti allergic medicines are also called antihistamines”. The histamine is a chemical produced in body due to the?

1. Deamination of amino acids
2. Decarboxylation of amino acids
3. Transamination of amino acids
4. Decarboxylation of fatty acids

In chromatographic analysis the principle used is?

1. Absorption
2. Distribution
3. Adsorption
4. Evaporation

30 grams of acetic acid reacts with excess of ethyl alcohol to form 40 grams of ethyl acetate during esterification then percentage yield of ester is?

1. 90.9%
2. 85.9%
3. 50%
4. 80%

The salt which is formed by neutralization of weak acid and weak base is?

1. Nacl
2. CH3COONA
3. (NH4)2 CO3
4. NH4Cl

Only one pair of the liquid in the following set of solutions does not obey the Raoul’s Law. Identify it?

1. Methanol and ethanol
2. Benzene and toluene
3. n-hexane and n-octane
4. Propanol and propanone

Automative antifreeze is a 60% weight/weight aqueous solution of ethylene glycol (C2H6O2) then its molality is?

1. 34 moles/kg
2. 24.2 moles/kg
3. 20 moles/kg
4. 28 moles/kg

The given reaction is the example of Free Radical Substitution (CH4 + Cl2 → CH3Cl + HCL). The order of this reaction is?

1. Zero
2. First
3. Second
4. Third

By the stroke of luck, the troops____, avoiding a crushing_____.

1. Encouraged, blow
2. Prevailed, defeat
3. Gathered, siege
4. None

Synonym of acquaintance is?

1. Ignorance
2. Connection
3. Intelligence
4. Familiarity

Antonym of illusory is?

1. Dejected
2. Imaginary
3. Real
4. Chaotic

Without payment or free of cost mean?

1. Hedonist
2. Gratis
3. Stoic
4. Precious

We must try to understand his momentary aberration for Hyder has _____ more strain and anxiety than any among us.

1. Undergone
2. Forgotten
3. Described
4. Understood

Seamstress is a woman who for a living?

1. Cooks food
2. Sews clothes
3. Sell things
4. Works in the sea

The king was determined to ______ the law.

1. Force
2. Practice
3. Observes
4. Enforce

Select the correct voice change: Could you help me, please?

1. Could me be helped
2. Will you help me, please
3. How could you help me
4. Could I be helped, please

The teacher said “The sun rises in the east”?

1. The teacher said that the sun rises in the east
2. The teacher said sun rises from east
3. Sun is raised from east sad the teacher
4. Teacher says sun is to be raised from east

The cholesteryl – benzoate is?

1. An example of colloidal solution
2. An example of liquid crystal
3. An example of immiscible solution
4. A constituent of buffer solution

‘He’ gas effuse from a hole of 10 dm^3 vessel in “5” seconds. The time for effusion of O2 from the same hole of 10 dm^3 will be?

1. 4 seconds
2. 12 seconds
3. 14.1 seconds
4. 10 seconds

Which of the following molecule is polar and its dipole moment is 5.33 x 10^-30 Cm?

1. CO2
2. SO2
3. CCl4
4. CH4

The co-ordination number and oxidation state of Cobalt in the given complex Na4[Co(C2O4)3] are respectively?

1. 6 and +3
2. 3 and +2
3. 3 and +4
4. 3 and +5

The metal ions of transition metals are paramagnetic. The magnetic moment towards magnetic field is greatest of?

1. Fe^+2
2. Fe^+3
3. Co^+2
4. Cr^+3

The F-S-F bond angles in SF6 are?

1. 109°28
2. 120° only
3. 90°
4. 90° and 180°

In a process at constant volume ΔE =_____?

1. ΔH
2. ΔT
3. q
4. ΔV

Which one of the following statements about the mass spectrum of CH3Br is correct?

1. Last two peaks are of equal size at m/z values of 94 and 96
2. Last two peaks are in the ratio of 3:1 at m/z value of 94 and 96
3. Just one peak for molecular ion at m/z values of 95
4. Just one peak for molecular ion at m/z value of 44

Magnetic susceptibility (χ) measures on?

1. Guoy balance
2. Analytical balance
3. Faraday balance
4. Both A and C

Natural rubber consists of polymers of the organic compound?

1. Isoprene
2. Alkaloid
3. Terpene
4. None

What is indicated when a chemical cell’s voltage has dropped to zero?

1. The concentration of reactants are increased
2. Concentration of products are increased
3. The cell reaction has reached equilibrium
4. The cell reaction has been stopped

In crystal field theory (CFT), the energy gap between t2g and eg sets is denoted by?

1. 8Dq
2. 10Dq
3. 0Dq
4. 20Dq thermic

For second order reaction, the initial concentration of reactant A is 0.24 M. If the rate constant is 8.1 x 10^-2 M^-1 s^-1, what is the concentration of A after 29 seconds?

1. 0.02 M
2. 0.15 M
3. 0.30 M
4. 0.45 M

Polymers which soften on heating and harden when cooled are?

1. Cross-liked polymers
2. Copolymers
3. Thermosetting polymers
4. Thermoplastics

Compound Z absorbs light of wavelength 320 nm. A 1.0 x 10^-3 mol dm^-3 solution of a compound Z gives an absorbance reading of 0.15 when placed in a solution cell path 1 cm. What is the value of the molar extinction (absorption) coefficient of Z?

1. 1500 mol^-1 dm^3 cm^-1
2. 0.15 mol^-1 dm^3 cm^-1
3. 1.5 mol^-1 dm^3 cm^-1
4. 150 mol^-1 dm^3 cm^-1

Which of the following statements is not true about precision of data?

1. It is the variability among replicate measurements
2. Low standard deviation within measurements mean good precision
3. It reflects how close the values in a series of results are to each other
4. It is the difference between the obtained value and the true value

Based on the equations below, which metal is the most active? Pb(NO3)2 (aq) + Ni (s) → Ni(NO2)2 (aq) + Pb (s), Pb(NO3)2 (aq) + Ag (s) → No reaction, Cu(NO3)2 (aq) + Ag (s) → No reaction?

1. Ni
2. Ag
3. Cu
4. Pb

Which combination will produce a precipitate?

1. NH4OH (aq) and HCL (aq)
2. AgNO3 (aq) and Ca(C2H3O2)2 (aq)
3. NaOH (aq) and Fe(NO3)3 (aq)
4. NaCl (aq) and HC2H3O2 (aq)

In_____, diffusion current is measured as a function of scanning potential difference.

1. Chromatography
2. Potentiometric
3. Voltammetry
4. Amperometry

The complexometric titration of the chemical specie cannot be done by using EDTA as titrant?

1. Ni^2+
2. Cu^2+
3. Fe^2+
4. Xe

Elements having zero nuclear spin cannot be directly determined at?

1. NMR spectroscopy
2. Atomic Absorption spectroscopy
3. IR spectroscopy
4. HPLC

The number of electrons involved in oxidation of glucose to gluconic acid are?

1. 3.5
2. 2.2
3. 5.2
4. 2

Which of the following is not a transition metal complex?

1. K2Cr2O7
2. K4[Fe(CN)6]
3. K3[Fe(CN)6]
4. [Ni(H2O)6]SO4

Pure water could be obtained from seawater by?

1. Filtration
2. Chromatography
3. Distillation
4. Centrifugation

Which set of hybrid orbitals of carbon is used by each oxygen in forming H2CO3?

1. sp3
2. sp2
3. sp
4. dsp2

The catalyst in Friedel-Crafts alkylation is?

1. AlCl3
2. FeCl3
3. Pt
4. I2

Oxidation of secondary alcohols produces

1. Aldehydes
2. Ketones
3. Ethers
4. Esters

____ are carboxylic acid with long hydrocarbon chain.

1. Fats
2. Lipids
3. Fatty acids
4. Proteins

The rate at which hydrogen is used in the reaction. N2(g) + 3H2(g) → 2NH3(g) is 1.72 mol H2.L^-1.h^-1. What is the rate (in mol N2.L^-1.h^-1) at which nitrogen is used?

1. 0.86
2. 1.76
3. 0.57
4. 5.16

The Lowry and Bronsted theory describes that Urea is amphiprotic solvent. If it reacts with ammonia then it acts as?

1. Acid to form
2. Base to form
3. Neutral to form
4. Amphoteric to form

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