Sail E0 Webinar

MCQs

Total Questions : 108 | Page 3 of 11 pages
Question 21. In 3° structure of proteins, folding and shaping is done by ____________
  1.    Hydrophobic interactions
  2.    Polar interactions
  3.    Hydrogen bonding
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Hydrophobic interactions
Answer: (a).Hydrophobic interactions
Question 22. The lone pair electrons on oxygen in a H₂0 molecule
  1.    carry a partial positive charge
  2.    are not important for the properties of water
  3.    carry a partial negative charge
  4.    form covalent bonds in ice
 Discuss Question
Answer: Option C. -> carry a partial negative charge
Answer: (c).carry a partial negative charge
Question 23. Which of the following statements about water is correct?
  1.    It is critical for many of the chemical processes found in living systems
  2.    Polar substances that can form hydrogen bonds will dissolve in it
  3.    Nonpolar substances like oils are not soluble in it
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 24. Which of the following statements about covalently bonded molecules is false?
  1.    Electrons are shared between the atoms that make up the molecule
  2.    Noncovalent bonds may also be present, especially if the molecule is large
  3.    Such molecules often result from the interaction of ionized atoms
  4.    The chemical bonds that hold the molecule together are relatively strong
 Discuss Question
Answer: Option C. -> Such molecules often result from the interaction of ionized atoms
Answer: (c).Such molecules often result from the interaction of ionized atoms
Question 25. The strength of an acid depends on
  1.    number of neutrons gain
  2.    electronegativity
  3.    number of double bonds
  4.    number of protons released
 Discuss Question
Answer: Option B. -> electronegativity
Answer: (b).electronegativity
Question 26. A biological polymer contains alanine, tyrosine, and lysine. Which of the following will be true about this molecule?
  1.    DNA
  2.    Strong base
  3.    Phospholipid
  4.    Protein
 Discuss Question
Answer: Option D. -> Protein
Answer: (d).Protein
Question 27. What is the heat of vaporization of water?
  1.    2260 J/g
  2.    2260 kJ/g
  3.    1260 J/g
  4.    1260 kJ/g
 Discuss Question
Answer: Option A. -> 2260 J/g
Answer: (a).2260 J/g
Question 28. The bond dissociation energy of O-H bond in a water molecule is _____________
  1.    23 kJ/mole
  2.    470 kJ/mole
  3.    470 J/mole
  4.    23 J/mole
 Discuss Question
Answer: Option B. -> 470 kJ/mole
Answer: (b).470 kJ/mole
Question 29. The bond dissociation energy of hydrogen bonds in a water molecule is ______________
  1.    470 kJ/mole
  2.    470 J/mole
  3.    23 kJ/mole
  4.    23 J/mole
 Discuss Question
Answer: Option C. -> 23 kJ/mole
Answer: (c).23 kJ/mole
Question 30. Which of the following is a hypertonic solution?
  1.    Oceans
  2.    Freshwater habitats
  3.    0.45% sodium chloride
  4.    Red blood cells placed in fresh water
 Discuss Question
Answer: Option A. -> Oceans
Answer: (a).Oceans

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