Wednesday, 4 March 2020

Chemistry Competitive Exams Solve MCQ Test

Here i am going to provide you a list of Chemistry Objective Type MCQs Quiz with Solved Answers. All of these MCQs are hlepful for Competitve Exams Preparations in Which Chemistry Tests is imporant part of that test.

Helpful Chemistry MCQs With Solved Answers
Solved Chemistry MCQS


Just like PPSC, FPSC, CSS, PMS, MCAT, ECAT, NAT and others important exams in which chemistry question answers inculuded.


Solved 50 MCQs of Chemistry For Exams


Q.1: The reasons for less experimental yield than theoretical yield are reversible reaction, side reaction and ?

  1. Maximization
  2. Temperature
  3. Pressure
  4. Crystallization

D

Q.2: An ion having negative charge is called ?

  1. Anion
  2. Photon
  3. Cation
  4. Electron

A

Q.3: Which statement about gases is not CORRECT ?

  1. There are large spaces between the molecules
  2. They spread throughout the vessel
  3. Molecules are arranged regularly
  4. Pressure is due to collision

C

Q.4: Which of the following assumptions is not belonging in kinetic molecular theory of gases ?

  1. Molecules remove randomly
  2. There is no force attraction between molecules
  3. The size of molecules is negligible
  4. Collisions between molecules is inelastic

D

Q.5: According to Planck energy travels is a discontinuous manner and it is composed of large number of tiny discrete units called ?

  1. Particles
  2. Photons
  3. Planta
  4. Quanta

D

Q.6: The dipole moment of water is ?

  1. 1.08 D
  2. 8.0 D
  3. 1.84 D
  4. 1.94 D

C

Q.7: The SI unit of heat + energy is ?

  1. None of the above
  2. Calorie
  3. Joule
  4. BTU

C

Q.8: Which element has maximum binding energy ?

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

A

Q.9: Which is an inert gas ?

  1. Oxygen
  2. Hydrogen
  3. CO
  4. Nitrogen

D

Q.10: Picric acid forms when phenol reacts with ?

  1. Hydrogen
  2. Sulphuric acid
  3. Nitric acid
  4. Formaldehyde

C

Q.11: Which has insulating effect on nervous system ?

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

A

Q.12: Grape sugar or blood sugar is called to ?

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

D

Q.13: Cannizzaro's reaction is not given by ?

  1. Benzaldehyde
  2. Formaldehyde
  3. Trimethyl
  4. Acetaldehyde

D

Q.14: Which reaction is base catalysed ?

  1. Addition of Grignard's reagent
  2. Addition of sodium bisulphate
  3. Addition of HCN
  4. All

D

Q.15: Esters are used as ?

  1. Dyes
  2. Fertilizers
  3. Artificial flowers
  4. Points

C

Q.16: Height of the liquid risen in the capillary tube depends upon the ?

  1. Length of capillary tube
  2. Material of capillary tube
  3. Diameter of capillary tube
  4. Temperature of liquid

C

Q.17: The S.I units of dipole moments are ?

  1. Joule meter
  2. Coulomb meter
  3. Joule
  4. Coulomb

B

Q.18: Which acid is used in the manufacture of synthetic fibre ?

  1. Carbonic acid
  2. Acetic acid
  3. Oxalic acid
  4. Formic acid

B

Q.19: A zero order reaction is one in which ?

  1. One reactant s in large excess.
  2. Reactants do not react.
  3. Rate is not affected by changing concentration of reactants.
  4. Concentration of reactant do not change with passage of time.

C

Q.20: Pentane has isomers ?

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

C

Q.21: Major component of natural gas is ?

  1. Ethane
  2. Propane
  3. Methane
  4. Ethene

C

Q.22: SN₂ reactions can be best carried out with ?

  1. Sec. Alkyl halide
  2. All the three
  3. Pri. Alkylhalide
  4. Ter. Alkyl halide

C

Q.23: pH of pure water is ?

  1. 14
  2. 7
  3. 0
  4. 9

B

Q.24: The Chaghi Hilla are located ?

  1. Near Quetta
  2. At China border
  3. Pak-Afghan border
  4. Near Sibi

A

Q.25: Which of the following is the oldest dam of Pakistan ?

  1. Warsak
  2. Tarbela
  3. Gomal zam
  4. Mangla

A

Q.26: Sodium belongs to block of periodic table ?

  1. d-block
  2. s-block
  3. f-block
  4. p-block

B

Q.27: Phenols are derivative of ?

  1. Alkanes
  2. Alkynes
  3. Alkenes
  4. Benzene

D

Q.28: The non-conductor, usually gaseous and volatile hydrides are ?

  1. Covalent
  2. Ionic
  3. Complex
  4. Intermediate

A

Q.29: Which term was derived from atomos ?

  1. Aromatic
  2. Atom
  3. Aliphatic
  4. Hydrocarbons

B

Q.30: Amongst the following, the compound that can be most readily sulphonated is ?

  1. Toluene
  2. Benzene
  3. Nitrobenzene
  4. Chlorobenzene

A

Q.31: A solution of glucose is 10%. The volume to which 1g mole of it dissolved will be ?

  1. 1.8 dm³
  2. 8.1 dm³
  3. 1.7 dm³
  4. 6.1 dm³

A

Q.32: A solution is a homogeneous mixture of two or more kinds of different ?

  1. Molecular substances and Ionic substances
  2. Covalent substances
  3. Ionic substances
  4. Molecular substances

A

Q.33: Which element does not belong to III-A group ?

  1. Al
  2. Th
  3. Ge
  4. Ga

C

Q.34: All gases can be compressed by ?

  1. Keeping constant pressure
  2. Increasing pressure
  3. None of the above
  4. Decreasing pressure

B

Q.35: If a system at equilibrium is disturbed by some change, the system will shift so as to counteract the effect of changes is the ?

  1. Le chatlier's principle
  2. Law of mass action
  3. Equilibrium state
  4. First law of thermo dynamics

A

Q.36: Saturated hydrocarbons are called ?

  1. Alkanes
  2. Alkenes
  3. Alkynes
  4. Alicyclic hydrocarbons

B

Q.37: Alkali metals possess one electron in the outer most ?

  1. S orbital
  2. D orbital
  3. F orbital
  4. P orbital

A

Q.38: Entropy is a measure of -------------- system ?

  1. Efficiency
  2. Disorder
  3. Input
  4. Internal energy

B

Q.39: A state function represents ?

  1. Exothermic state
  2. Chemical state
  3. Physical state
  4. None of the above

D

Q.40: Cholesterol is the precursor of steroid hormones belonging to class of compounds ?

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

C

Q.41: The brown gas formed when metal reduces HNO₃ is ?

  1. NO₂
  2. N₂O₄
  3. N₂O₃
  4. N₂O₅

A

Q.42: Bakelite is a ?

  1. Simple molecules
  2. Macromolecules or adduct
  3. Minor molecules
  4. Monomer

B

Q.43: A good reservoirs of energy to body is ?

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

D

Q.44: Protein molecule is a molecule having molecular mass greater than ?

  1. 100, 000
  2. 1000, 000
  3. 1000
  4. 10, 000

D

Q.45: A substance having only sigma bond gives reaction ?

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

A

Q.46: The SI unit for measurement of pressure is ?

  1. Pounds per square inch (PSI)
  2. Newton (N)
  3. Atmosphere (atm)
  4. Pascal (Pa)

D

Q.47: Dobereiner arranged similar elements into groups called ?

  1. Tetrade
  2. Octanes
  3. Triads
  4. Decades

C

Q.48: Geological survey of Pakistan estimates about billion tons of coal in Pakistan ?

  1. 184
  2. 182
  3. 185
  4. 183

A

Q.49: Alkanes with same number of carbons as in Grignard’s reagent can be prepared by its reaction with ?

  1. HCN
  2. Water
  3. All
  4. NH₃

C

Q.50: The e/m value for positive rays is maximum ?

  1. Nitrogen
  2. Oxygen
  3. Helium
  4. Hydrogen

D



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