Chemistry Solved Questions and Answers Set 24

February 7, 2019 entranciology Chemistry Solved Questions and Answers Sets, Solved Questions and Answers Sets For Competitive Exams 0

Q.1:- Why are noble gases are called so ? [CDS Exams 2006]

  1. They react quickly with other compound
  2. Due to their chemical inertness
  3. They react only with Carbon compound
  4. They can produce Oxygen

Q.2:- The most reactive among the Halogen is ? [IAS Exam 1997]

  1. Fluorine
  2. Chlorine
  3. Bromine
  4. Iodine

Q.3:- Among the Halogens, the one which is oxidized by Nitric Acid is ?

  1. Chlorine
  2. Iodine
  3. Fluorine
  4. Bromine

Q.4:- The gas obtained by radioactive disintegration of radium (226) is ?

  1. Argon
  2. Neon
  3. Radon
  4. Krypton

Q.5:- On adding little phosphorous to Silicon, we get ?

  1. Insulator
  2. Metallic
  3. N-Type Semiconductor
  4. P-Type Semiconductor

Q.6:- “Kelp” is ? [SSC CGL Exam 2014]

  1. Sulphide Mineral of Iron
  2. Partially Decomposed Vegetation
  3. Sea Weed Rich in Iodine Content
  4. An Aluminium Silicate Mineral
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Q.7:- The chromatography technique was developed by ?

  1. Soxhlet
  2. Tswett
  3. Victor Grignard
  4. Liebig

Q.8:- Azeotropic mixtures ?

  1. Boil at different temperature
  2. Are mixtures of solids
  3. Are constant boiling mixtures
  4. None of the above

Q.9:- Which one of the following is the Heterocyclic compound ?

  1. Pyrene
  2. Thiophene
  3. Phenol
  4. Aniline

Q.10:- The alkanes have a general formula ?

  1. CnH2n
  2. CnH2n+4
  3. CnH2n-2
  4. CnH2n+2

Q.11:- Glucose has how many optical isomers ?

  1. 8
  2. 12
  3. 16
  4. Cannot be predicted

Q.12:- The isomerism observed in Alkanes is ?

  1. Metamerism
  2. Chain Isomerism
  3. Position Isomerism
  4. Geometrical Isomerism

Q.13:- Octane number of a fuel can be increased by ?

  1. Isomerisation
  2. Alkylation
  3. Reforming
  4. All of the above

Q.14:- Iso-Octane is added to petrol ?

  1. To precipitate inorganic material
  2. To prevent freezing of petrol
  3. To increase the boiling point
  4. As an anti-knocking agent
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Q.15:- Acidic Hydrogen is present in ?

  1. Ethyne
  2. Ethene
  3. Benzene
  4. Ethane

Q.16:- Chloral is ?

  1. CCl3CHO
  2. CCl3CH3
  3. CCl3COCH3
  4. CCl3CH2OH

Q.17:- Catalytic reduction of water gas gives ?

  1. Acetylene
  2. Ethylene
  3. Ethane
  4. Methane

Q.18:- Chloropicrin is ?

  1. Picric Derivative
  2. Nitrochloroform
  3. Nitromethane
  4. Nitroethyl Chloride

Q.19:- Fisher-Tropsch process is used in the manufacture of ?

  1. Ethane
  2. Benzene
  3. Synthetic Petrol
  4. LPG

Q.20:- Kerosene is a mixture of ?

  1. Aromatic Hydrocarbons
  2. Aliphatic Hydrocarbons
  3. Saturated Hydrocarbons
  4. Alicyclic Hydrocarbons

Q.21:- Grain alcohol is common name of ?

  1. Amyl Alcohol
  2. Ethyl Alcohol
  3. Methanol
  4. None of these

Q.22:- The group reagent for the test of alcohols is ?

  1. Ceric Ammonium Nitrate
  2. Schiff’s Reagent
  3. Molisch’s Reagent
  4. Bromine Water
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Q.23:- Which of the following is not a fatty acid ?

  1. Stearic Acid
  2. Palmitic Acid
  3. Propionic Acid
  4. Phenyl Acetic Acid

Q.24:- The factor adversely affecting the fermentation process is ?

  1. Presence of air
  2. Low concentration of sugar
  3. High concentration of sugar
  4. Presence of an enzyme

Q.25:- Paraffin Wax is ?

  1. An Ester
  2. A long chain acid
  3. Monohydric alcohol
  4. A mixture of higher alkanes

 

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