Sail E0 Webinar

MCQs

Total Questions : 168 | Page 2 of 17 pages
Question 11. When hot molten liquid cools,
  1.    the first crystals are the most pure
  2.    impure substances may also form the crystals
  3.    it turns into gas
  4.    it turns into aqueous solution
 Discuss Question
Answer: Option A. -> the first crystals are the most pure
Answer: (a).the first crystals are the most pure
Question 12. Chromatography can be used to
  1.    form mixtures
  2.    change mixture compositions
  3.    separate mixtures into pure substances
  4.    all of these
 Discuss Question
Answer: Option C. -> separate mixtures into pure substances
Answer: (c).separate mixtures into pure substances
Question 13. Larger crystals can be obtained if the
  1.    evaporation is at high temperature
  2.    evaporation rate is slow
  3.    evaporation rate is fast
  4.    evaporation speed remains stable
 Discuss Question
Answer: Option B. -> evaporation rate is slow
Answer: (b).evaporation rate is slow
Question 14. Condensed solid produced during sublimation is
  1.    crystals
  2.    sublimate
  3.    residue
  4.    insoluble
 Discuss Question
Answer: Option B. -> sublimate
Answer: (b).sublimate
Question 15. While forming crystals, it is important to
  1.    evaporate to dryness to get purest possible crystals
  2.    attach the gas syringes to collect fumes
  3.    not evaporate the water of crystallization
  4.    use high flames
 Discuss Question
Answer: Option C. -> not evaporate the water of crystallization
Answer: (c).not evaporate the water of crystallization
Question 16. Phase that never gains in sublimation is
  1.    solid
  2.    liquid
  3.    gas
  4.    vapors
 Discuss Question
Answer: Option B. -> liquid
Answer: (b).liquid
Question 17. Chromatography refers to the
  1.    concentration of chromium in a substance
  2.    mass of chromium
  3.    testing of additives
  4.    testing of the alkalinity or acidity
 Discuss Question
Answer: Option C. -> testing of additives
Answer: (c).testing of additives
Question 18. Locating agent of amino acids is
  1.    Diazo reagent
  2.    ninhydrin spray
  3.    Amphoteric oxides
  4.    neutral oxides
 Discuss Question
Answer: Option B. -> ninhydrin spray
Answer: (b).ninhydrin spray
Question 19. Traces of water can be removed from ethanol distillate
  1.    through evaporation of water
  2.    through decanting water
  3.    through the use of vacuum distillation
  4.    through the use of a suitable during agent
 Discuss Question
Answer: Option D. -> through the use of a suitable during agent
Answer: (d).through the use of a suitable during agent
Question 20. A solid that reappears from solution is called
  1.    sublimate
  2.    residue
  3.    immiscible
  4.    crystal
 Discuss Question
Answer: Option D. -> crystal
Answer: (d).crystal

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0