Wednesday, 4 March 2020

Chemistry Online Solved MCQs With Answers List

If you are searching Chemistry MCQs For exams Preparations then here you will easily learn 50 most important objective type question answers. All of these question answers are helpful for Competitive exams Preparations learn here. All of these MCQs are helpful for NTS tests all national testing service exams preparations MCAT and ECAT exams.

MDCAT And ECAT Exam Test Preparations MCQs With Answers
Chemistry MCQs Quiz Test


In Medical and Engineering tests Chemistry is the compulsory test. If you want to learn past papers MCQs then here is a list of objective type question answers.


Competitive Exams Preparations MCQs List


Q.1: The movement of gas molecules from a region of high pressure to vacuum is called ?
  1. Effusion
  2. Evaporation
  3. Conduction
  4. Diffusion
A
Q.2: Which one of the following elements is not present in all proteins ?
  1. Hydrogen
  2. Carbon
  3. Sulphur
  4. Nitrogen
D
Q.3: The reaction of aldehydes which are (is) base catalysed addition ?
  1. All
  2. Addition of hydrogen
  3. Addition of ammonia
  4. Polymerization
A
Q.4: Acetic acid is manufactured by ?
  1. Distillation
  2. Esterification
  3. Ozonolysis
  4. Fermentation
D
Q.5: Acetic acid is ionizable ?
  1. Very strongly
  2. Strongly
  3. Weakly
  4. Not ionizable
C
Q.6: Charge to mass ratio (e/m) was determined by ?
  1. R.A Millikan
  2. J.J Thomson
  3. J. Perrin
  4. William Crooks
B
Q.7: Which of the following reactions occur at moderate rate ?
  1. Chemical weathering of stone work of buildings by acidic gases in atmosphere.
  2. Fermentation of sugars
  3. Hydrolysis of an ester
  4. Rusting of iron
C
Q.8: The process in which ionization of an electrolyte is suppressed by the addition of another strong electrolyte containing one same ion is called ?
  1. Electrolysis
  2. Common ion effect
  3. Pyrolysis
  4. Hydrolysis
B
Q.9: The substance that alters the rate of a chemical reaction but recovered unchanged at the end is called a ?
  1. Reactant
  2. Catalyst
  3. Promoter
  4. Product
B
Q.10: The state of hybridization of carbon atom in methane is ?
  1. dsp²
  2. sp
  3. sp²
  4. sp³
D
Q.11: In primary alkyl halides, the halogen atom is attached to a carbon which is attached to how many carbon atoms ?
  1. Two
  2. Four
  3. One
  4. Three
C
Q.12: The pH of 0.001M NaOH aqueous solution is ?
  1. 8
  2. 11
  3. 9
  4. 13
B
Q.13: A chemical reaction A →B is said to be in equilibrium when ?
  1. Complete conversion of A to B has taken place
  2. Conversion of A to B is 50% complete.
  3. 50% reactant has been changed to B.
  4. Rate of transformation of A to B is equal to B to A.
D
Q.14: Indus River originates from ---------- ?
  1. Tibet
  2. Kashmir
  3. Ladakh
  4. Jammu
A
Q.15: Stability of hydrides in a period from left to right ?
  1. Decreases
  2. Remains same
  3. Increases
  4. May increases or decreases
B
Q.16: Which of the following acid can be used as a catalyst in Friedel Craft’s reactions ?
  1. AlCl₃
  2. BeCl₂
  3. NaCl
  4. HNO₃
A
Q.17: The molecule has triple bond in it ?
  1. CO
  2. CO₂
  3. CO and CO₂
  4. C₃O₂
A
Q.18: The substance which is present in small quantity is called ?
  1. Solvent
  2. Solution
  3. None of above
  4. Solute
D
Q.19: In interstitial hydrides, the transition metals actually ?
  1. React with hydrogen
  2. React with atomic hydrogen
  3. Absorb hydrogen
  4. Adsorb hydrogen
D
Q.20: Formula of cryolite is ?
  1. Al₂O₃.2H₂O
  2. Na₃AlF₆
  3. Ca₂B₆O₁₁.5H₂O
  4. Na₂B₄O₇.10H₂O
B
Q.21: Urea contains nitrogen ?
  1. 50%
  2. 46%
  3. 40%
  4. 36%
B
Q.22: Buffer capacity is maximum when both components have ?
  1. Low concentration
  2. Equal concentration
  3. High and equal concentration
  4. High concentration
C
Q.23: Baran River is flowing in the province of ?
  1. KPK
  2. Sindh
  3. Balochistan
  4. Punjab
B
Q.24: Reaction of CO₂ with Grignard’s reagent gives ?
  1. Ethanol
  2. Ethanoic acid
  3. Ethanone
  4. Ethanal
B
Q.25: A white precipitate of silver chloride immediately formed on addition of ?
  1. Silver nitrate solution to potassium chloride solution.
  2. Silver chloride solution to sodium nitrate solution.
  3. Silver nitrate solution to sodium chloride solution.
  4. Silver nitrate solution to hydrogen chloride solution.
C
Q.26: In t-butyl alcohol , the tertiary carbon is bonded to ?
  1. Two hydrogen atoms
  2. Three hydrogen atoms
  3. One hydrogen atom
  4. No hydrogen atom
D
Q.27: 4-d series is in the period ?
  1. 5th
  2. 4th
  3. 6th
  4. 7th
A
Q.28: The basic distinction between solids, liquids and gases lies in difference between ?
  1. All of above
  2. Space which the molecules occupy
  3. Size of molecules
  4. Strength of bonds
D
Q.29: Which of he following is a noble gas ?
  1. Cl₂
  2. N₂
  3. Ne
  4. H₂
C
Q.30: Wrought iron is prepared from pig iron by the process ?
  1. Blast furnace
  2. Open heart process
  3. Puddling
  4. Bessemer’s atom
B
Q.31: What do you call the apparatus generally used for measuring heat changes ?
  1. Calorimeter
  2. Coulometer
  3. Voltmeter
  4. Voltameter
A
Q.32: Water contains oxygen about ?
  1. 89%
  2. 48%
  3. 53%
  4. 50%
A
Q.33: Oxygen is present in atmosphere about ?
  1. Not exactly so,
  2. ¾
  3. ¼
  4. ½
C
Q.34: According to Lewis concept ether behaves as ?
  1. Base
  2. Acid
  3. Acid as well as a base
  4. None of them
A
Q.35: The fibre which is made from acrylonitrile as monomer ?
  1. Rayon fibre
  2. Polyester fibre
  3. PVC
  4. Acrylic fibre
D
Q.36: Amyl butyrate has flavour of ?
  1. Jasmine
  2. Apricol
  3. Banana
  4. Raspbery
B
Q.37: First atomic theory was put forward by an English school teacher ?
  1. Newton
  2. John Dalton
  3. Maxwell
  4. Sanger
B
Q.38: The mass of one mole of iodine ?
  1. 74 g
  2. 127 g
  3. 53 g
  4. 245 g
D
Q.39: Human blood has a pH of ?
  1. 9.35
  2. 8.35
  3. 7.35
  4. 6.35
C
Q.40: Maximum potential energy that can electron can have within the atom is ?
  1. Infinite
  2. Equal to zero
  3. Greater than zero
  4. Less than zero
D
Q.41: The covalent radius of Cl atom is ?
  1. 76 pm
  2. 176.7 pm
  3. 99.4 pm
  4. 38 pm
C
Q.42: Recified spirit contains alcohol about ?
  1. 85%
  2. 90%
  3. 95%
  4. 80%
C
Q.43: What is the value of internal of an element of 25°C at atmospheric pressure ?
  1. 273 cal/mole
  2. 0 cal/mole
  3. 50 cal/mole
  4. 10 cal/mole
B
Q.44: Vegetable oils are ?
  1. Unsaturated fatty acids
  2. Glycerides of unsaturated fatty acids
  3. None of these
  4. Essential oils obtained from plants
B
Q.45: The least sweet (sweetless) saccharide is ?
  1. All of these
  2. Polysaccharide
  3. Disaccharide
  4. Monosaccharides
C
Q.46: Which following derivative cannot be prepared directly from acetic acid ?
  1. Ethyl acetate
  2. Acetyl chloride
  3. Acetamide
  4. Acetic anhidride
A
Q.47: Gaseous pressure is the force exerted by gas on unit ?
  1. Capacity
  2. Volume
  3. Area
  4. Length
C
Q.48: When rate of reaction is restarted by adding a substance, it is said to be ?
  1. Positive catalyst
  2. Negative catalyst
  3. Catalyst
  4. Auto catalyst
B
Q.49: Which compound does not show in isomerism ?
  1. Hexane
  2. Butane
  3. Pentane
  4. Propane
D
Q.50: When CO₂ is made to react with ethyl magnesium iodide, followed by hydrolysis, the product formed is ?
  1. Propanal
  2. Propanic acid
  3. Propanol
  4. Propane
B


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