Thursday, 5 March 2020

Chemistry Public Service Commission MCQs With Answers

If you are looking to search objective type and short question answers type MCQs of Chemistry with solved answers here you are on right page. You will learn here Pakistan Public Service Commission Question Answers From Past Papers. These entire MCQs list is taken from the previous old Papers.

Chemistry Objective Type Question Answers For Public Service Commisssion Tests
Chemistry MCQs Solutions


These MCQs are also helpful for the Interviews Preparations also, Some of Students want to learn from the Old Chemistry PPSC, FPSC, SPSC, BPSC, KPPSC, NTS, CSS, PMS, PMA, MCAT, ECAT, NAT, OTS, CTS, GAT and others related testing Services Past Papers Question Answers. Here is a list of more then 100 MCQs With Answers on Chemistry Organic and Inorganic and others Chemistry Important MCQs.


Public Service Commission Chemistry MCQs With Answers


Q.1: Which of the following will affect the rate ?

  1. First step of reaction
  2. Fastest step
  3. Rate determining step
  4. Last step of reaction

C

Q.2: Metals tends to lose electrons, becoming ?

  1. Negatively charged ions
  2. Non metals
  3. Positively charged ions
  4. All of above

C

Q.3: Kinetic theory of gas was put forward by ?

  1. Culomb
  2. Bernoulli
  3. Maxwell
  4. Newton

B

Q.4: Which has least melting point among the given ?

  1. Co
  2. V
  3. Zn
  4. W

D

Q.5: Esters have smell like ?

  1. Chlorine
  2. Fruits
  3. Sulphur
  4. Acids

B

Q.6: Which one of following id not crystalline ?

  1. Disaccharide
  2. Polysaccharide
  3. Monosaccharide
  4. Oligosaccharides

B

Q.7: River Ravi originates from -------- ?

  1. Tibet
  2. Jammu and Kashmir
  3. Northern Areas of Pakistan
  4. Himachal Pradesh

D

Q.8: Alkylation of benzene gives ?

  1. Toluene
  2. Benzene sulphonic acid
  3. Maleic anhydride
  4. Nitrobenzene

A

Q.9: The slightly polar oxide of carbon is ?

  1. CO
  2. CO and CO₂
  3. C₃O₂
  4. CO₂

A

Q.10: Elements which do not react with other elements, have their outermost shell ?

  1. Half filled
  2. Completely empty
  3. Completely filled
  4. Complex shaped

C

Q.11: Which element has zero binding energy ?

  1. Co
  2. V
  3. Zn
  4. W

B

Q.12: Aldehydes are oxidized to give ?

  1. Ter-alcohol
  2. Carboxylic acid
  3. Sec-alcohol
  4. Primary alcohols

B

Q.13: The equation E= mc2 was given by ?

  1. Planck
  2. Neils Bohr
  3. Louis Victor Prince de Broglei
  4. Albert Einstein

D

Q.14: Inside every fluorescent lamp there is present a ?

  1. Gas
  2. Plasma
  3. Solid
  4. Liquid

B

Q.15: Which molecules has not hydrogen bonding in them ?

  1. HF
  2. Water
  3. Ethers
  4. Alcohol

C

Q.16: A pseudo uni-molecular reaction has order of reaction ?

  1. 1
  2. 0
  3. 2
  4. 3

A

Q.17: Ras Koh range is situated in ?

  1. Kirthar Range
  2. Indus Plain
  3. Balochistan
  4. Karakoram

C

Q.18: Aromatic hydrocarbons are the derivatives of ?

  1. Alkene
  2. Benzene
  3. Normal series of paraffins
  4. Cyclohexane

B

Q.19: Every sample of matter with uniform properties and a fixed composition is called a ?

  1. Phase
  2. Solid
  3. Liquid
  4. Gas

A

Q.20: The building blocks of proteins are called ?

  1. Carboxylic acids
  2. amino acids
  3. Monosaccharides
  4. Lipids

B

Q.21: Heat evolving reaction is called the ?

  1. Reversible reaction
  2. Exothermic reaction
  3. Endothermic reaction
  4. Fast reactions

B

Q.22: The triatomic molecule with zero dipole moment has shape ?

  1. Angular
  2. Linear
  3. Trigonal plannar
  4. Tetrahedral

C

Q.23: Entropy of universe tends towards ?

  1. Minimum
  2. Maximum
  3. Remains constant
  4. Zero

C

Q.24: Law of traids was given by ?

  1. Al-Razi
  2. Mendeleev
  3. Newland
  4. Dobriener

D

Q.25: Reaction of HNO₃with benzene gives ?

  1. Benzene sulphonic acid
  2. Benzophenone
  3. Nitrobenzene
  4. Maleic anhydride

C

Q.26: Which will cook food more easily ?

  1. Alcoholic water
  2. Slight amount of HCl in water
  3. Saline water
  4. Pure water

C

Q.27: From top to bottom in a group, the ionization energy ?

  1. Decreases
  2. Remains constant
  3. Becomes zero
  4. Increases

A

Q.28: Nascent hydrogen is denoted by symbol ?

  1. (H-)
  2. (H+)
  3. H2
  4. [H]

D

Q.29: Compounds having same molecular formula but different structures are said to be ?

  1. Isomers
  2. Allotrops
  3. Isomorphs
  4. Isotops

A

Q.30: Non-metals tend to gain electrons, becoming ?

  1. Negatively charged ions
  2. Positively charged ions
  3. All of above
  4. Metals

A

Q.31: The rate determining step is the ?

  1. Moderate step
  2. Slowest step
  3. Slowest step and Fastest step
  4. Fastest step

B

Q.32: The pH value of 0.001M HCl solution is water is ?

  1. Nearly 7
  2. Greater Then 7
  3. Less Then 7
  4. Exactly 7

C

Q.33: Mendeleev was a scientist ?

  1. German
  2. Russian
  3. English
  4. French

B

Q.34: The number of moles of solute in 1000g (1 kg) of the solvent is called ?

  1. Molality
  2. Mole fraction
  3. Molarity
  4. Normality

A

Q.35: Which is used in navigational equipments ?

  1. Mg
  2. B
  3. Be
  4. Al

D

Q.36: Substances which are added to the soil to provide nutrients to plants are called ?

  1. Growth hormone
  2. Fertilizers
  3. Pesticides
  4. Minerals

B

Q.37: Wood spirit is the commercial name of ?

  1. Methyl alcohol
  2. Phenol
  3. Ethyl alcohol
  4. Ethanol

A

Q.38: Sr, Y and La belong to the series ?

  1. II-B
  2. III-B
  3. IV-B
  4. I-B

B

Q.39: Which element has highest melting point ?

  1. Zn
  2. V
  3. W
  4. Co

D

Q.40: Which is used as an at once source of energy to body ?

  1. Carbohydrates
  2. Glucose
  3. Lipids
  4. Protein

B

Q.41: Amino acids (proteins) are identified by the test ?

  1. Ninhydrin
  2. Iodine
  3. Starch
  4. Lucas

A

Q.42: Boron hydrides are ?

  1. Electron deficient hydrides
  2. Electron rich hydrides
  3. Interstitial hydrides
  4. Neutral hydrides

A

Q.43: Monohaloalkanes have halogen atoms in it ?

  1. Three
  2. Four
  3. One
  4. Two

C

Q.44: The length of Ravi River is ---------- ?

  1. 725 km
  2. 730 km
  3. 720 km
  4. 760 km

C

Q.45: Benzene cannot undergo ?

  1. Addition reactions
  2. Substitution reactions
  3. Oxidation reactions
  4. Elimination

D

Q.46: All the three states of matter i.e., solid, liquid, gas can act as ?

  1. Solute
  2. Solvent
  3. Solvent or solute
  4. None of above

C

Q.47: Which molecule is disatomic in nature ?

  1. CO₂
  2. CO
  3. CO and CO₂
  4. C₃O₂

B

Q.48: Azimuthal quantum number describes the ?

  1. Shape of an orbital
  2. Orientation of an orbital
  3. Spin of an electron
  4. Energy of election

A

Q.49: X-rays are attracted towards ?

  1. Any Electrode
  2. Anode
  3. Cathode
  4. None of electrode

D

Q.50: Salts of chromic acids are called ?

  1. Silicates
  2. Dichromates
  3. Silicones
  4. Chromates

A

Q.51: A salt "X" is dissolved in water of pH 7, the resulting solution becomes alkaline in nature, salt "X" is made up of ?

  1. Strong acid and weak base
  2. Strong acid and strong base
  3. Weak acid and weak base
  4. Weak acid and strong base

D

Q.52: Determination of atomic masses and invention of system of writing symbols was made by ?

  1. None of the above
  2. Dalton
  3. J. Berzelius
  4. Democritus

C

Q.53: Alpha rays consists of ?

  1. Helium nucleus
  2. Hydrogen nucleus
  3. Neutrons
  4. Protons

A

Q.54: 5-d series is in the period ?

  1. 5th
  2. 7th
  3. 4th
  4. 6th

D

Q.55: Polymide consisting of hundreds to thousands amino acids is called ?

  1. Carbohydrates
  2. Polypeptide
  3. Protein
  4. Lipids

C

Q.56: The % age of nitrogen in ammonium nitrate is ?

  1. 40 - 45%
  2. 34 - 36 %
  3. 25 - 30 %
  4. 32 - 33.5%

D

Q.57: Trihaloalkanes have number of halogen atom (s) ?

  1. Three
  2. One
  3. Two
  4. Four

A

Q.58: Boon Aluminium, Gallium, Indium, and thallium belong to group ?

  1. IV-A
  2. I-A
  3. II-A
  4. III-A

D

Q.59: The least important oxide of carbon is ?

  1. CO
  2. CO₂
  3. C₃O₂
  4. CO and CO₂

C

Q.60: S.I unit of heat is ?

  1. Joule
  2. Calorie
  3. British thermal unit
  4. Kilowatt hormone

A

Q.61: Known oxide of carbon is ?

  1. CO₂
  2. CO
  3. C₃O₂
  4. CO and CO₂

D

Q.62: The phenomenon of cooling on sudden expansion of gases is called ?

  1. Compton's effect
  2. Joule Thomson effect
  3. Charl's effects
  4. Boyl's effect

B

Q.63: The sum of mole fractions of components of a solution is equal to ?

  1. 0
  2. 100
  3. 10
  4. 1

D

Q.64: Borax in water is ?

  1. Soluble
  2. Sparingly soluble
  3. Immiscible
  4. Insoluble

B

Q.65: 'Cathode rays can cast shadows' was discovered by ?

  1. William crooks
  2. Hittorf
  3. J.J. Thomson
  4. Roentgen

B

Q.66: Borax is hydrated ?

  1. Deca
  2. Hepta
  3. Penta
  4. Octa

A

Q.67: A salt "X" is dissolved in water of pH 7, the resulting solution becomes alkaline in nature, salt "X" is made up of ?

  1. Strong acid and weak base
  2. Strong acid and strong base
  3. Weak acid and weak base
  4. Weak acid and strong base

D

Q.68: As compared to molar solution, in the molal solution the quantity of solvent is ?

  1. Comparatively lesser
  2. Very large
  3. More or less equal
  4. Comparatively greater

D

Q.69: Solutions containing relatively lower concentrations of solute are called ?

  1. Lighter solutions
  2. Dilute solutions
  3. Concentrated solutions
  4. None of above

B

Q.70: The substance which is present is large quantity is called ?

  1. Solute
  2. Solvent
  3. None of these
  4. Solution

B

Q.71: Characteristics of aromatic are ?

  1. Characteristics odour
  2. Characteristics properties
  3. Low hydrogen carbon ratio than alkenes
  4. Low hydrogen carbon ratio than alkenes and Characteristics odour

D

Q.72: Oxidation state of boron, aluminium and gallium is ?

  1. +2
  2. +4
  3. +3
  4. +1

C

Q.73: Newland said, every eight element repeats properties of element ?

  1. 3rd
  2. 4th
  3. 2nd
  4. 1st

B

Q.74: Organic compounds are ?

  1. Compounds of carbon and nitrogen
  2. Compounds of carbon and halogens
  3. Compounds of carbon and their derivatives
  4. Compounds of carbon

C

Q.75: 2.3*10-6 is the exponential form of ?

  1. 0.0000023
  2. 2.3000000
  3. 2300000
  4. 0.2300000

A

Q.76: A carboxylic acid contains ?

  1. A hydroxyl group
  2. A carboxyl and aldehyde group
  3. A hydroxyl and carboxyl group
  4. A carboxyl group

D

Q.77: Half life period of a first order reaction is independent of ?

  1. Initial concentration of the compound
  2. All of the above
  3. Conditions of temperature
  4. Presence of catalyst

B

Q.78: Grignard reagent is reactive due to ?

  1. The presence of Mg atom
  2. The polarity of C- Mg bond
  3. None of above
  4. The presence of halogen atom

B

Q.79: What happens when a reaction is at equilibrium and more reactant is added ?

  1. Forward reaction rate is decreased
  2. Backward reaction rate is increased
  3. Forward reaction rate is increased
  4. Equilibrium remains unchanged

C

Q.80: Gomal River starts from -------- ?

  1. KPK
  2. Afghanistan
  3. Balochistan
  4. Iran

B

Q.81: Oxides of metals are ?

  1. Amphoteric
  2. Super oxides
  3. Basic oxides
  4. Acidic oxides

C

Q.82: Atoms can be evident by the use of electron microscope. field ionization microscope and ?

  1. Telescope
  2. Compound microscope
  3. Video camera
  4. x-rays

D

Q.83: Neutron was discovered by ?

  1. Rutherford
  2. Bohr
  3. Chadwick
  4. Plank

C

Q.84: The theory of chemical bonding has been a major problem of ?

  1. Modern Chemistry
  2. Modern Biology
  3. Mechanics
  4. Modern Physics

A

Q.85: In the chemical combination of sodium and hydrogen to form NaH ?

  1. Both the atoms share the electron
  2. None of above
  3. Sodium atom gains an electron
  4. Hydrogen atom gains an electron

D

Q.86: Gases deviate from ideal behavior because molecules ?

  1. Repel each other
  2. Attract each other
  3. Contain covalent bond
  4. None of above

B

Q.87: The number of subatomic particles in atoms so far discovered is more than ?

  1. 125
  2. 110
  3. 100
  4. 90

C

Q.88: Elements combine together due to inherent tendency to stabilize themselves by ?

  1. Gaining electrons
  2. Sharing electrons
  3. Losing electron
  4. All of above

D

Q.89: A substance or a mixture undergoing a physical change is called ?

  1. Surroundingsl
  2. Compound
  3. System
  4. None of the above

C

Q.90: Silica contains oxygen by weight ?

  1. 53%
  2. 89%
  3. 50%
  4. 48%

A

Q.91: Solubility of alcohols in water is in ?

  1. Medium alcohols
  2. High alcohols
  3. Higher alcohols
  4. Lower alcohols

D

Q.92: A substance having sigma and pi bond in it gives ?

  1. Reduction
  2. Neutralization
  3. Addition
  4. Substitution

C

Q.93: Amyl acetate have flavour of ?

  1. Raspberry
  2. Banana
  3. Jasmine
  4. Apricol

B

Q.94: Total coal resources in Pakistan are estimated by the geological survey of Pakistan is (in billion tones) ?

  1. 183
  2. 181
  3. 184
  4. 180

C

Q.95: In the formation of interstitial hydrides, hydrogen undergoes ?

  1. Chemical inactivation
  2. Chemical reaction
  3. Absorption
  4. Adsorption

D

Q.96: Dehalokanes have halogen atoms in it ?

  1. Three
  2. Four
  3. One
  4. Two

D

Q.97: The sum of pH and pOH is ?

  1. 18
  2. 7
  3. 10
  4. 14

D

Q.98: Evaporation of water is a ?

  1. Chemical energy is produced
  2. An endothermic change
  3. No heat change occurs
  4. An exothermic change

B

Q.99: Which element of group IV-A does not use d-orbital ?

  1. Sb
  2. N
  3. P
  4. As

B

Q.100: Laughing gas is chemically ?

  1. N₂O
  2. NO
  3. N₂O₄
  4. NO₂

A

Q.101: A salt "X" is dissolved in water of pH 7, the resulting solution becomes alkaline in nature, salt "X" is made up of ?

  1. Strong acid and weak base
  2. Strong acid and strong base
  3. Weak acid and weak base
  4. Weak acid and strong base

D

Q.102: At transition temperature two forms co-exist ?

  1. Allotropic forms
  2. Isotopic forms
  3. Isomeric forms
  4. Crystalline forms

D

Q.103: The Kabul River merges into ------ ?

  1. Kaghan River
  2. Indus River
  3. Jhelum River
  4. Kuram River

B

Q.104: Acids and bases when dissolved in water ?

  1. May or may not be completely dissociated
  2. May be completely dissociated
  3. None of above
  4. May not be completely dissociated

A

Q.105: PastYourQuestionHere ?

  1. UAE
  2. Iran
  3. Pakistan
  4. USA

C

Q.106: In which of the following provinces Swat, Gomal, Karum and Kabul River flow ?

  1. Sindh
  2. Punjab
  3. KPK
  4. Balochistan

C

Q.107: Monohaloalkanes are also called ?

  1. Alcohols
  2. Halokanes
  3. Ester
  4. Alkyl halides

D

Q.108: Dextose is also called ?

  1. Fructose
  2. Glucose and Fructose
  3. Sucrose
  4. Glucose

D



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