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MCQs

Total Questions : 526 | Page 6 of 53 pages
Question 51. If 10 percent urea is present in NaCl it will become
  1.    needle like
  2.    cubic
  3.    oval
  4.    round
 Discuss Question
Answer: Option A. -> needle like
Answer: (a).needle like
Question 52. Hexagonal crystals are formed by
  1.    copper
  2.    iron
  3.    CdS
  4.    Sulphur
 Discuss Question
Answer: Option C. -> CdS
Answer: (c).CdS
Question 53. Energy is changed when matter undergoes
  1.    chemical change
  2.    physical change
  3.    pressure change
  4.    volume change
 Discuss Question
Answer: Option B. -> physical change
Answer: (b).physical change
Question 54. Boiling point 181.8 degree Celsius describes
  1.    acetone
  2.    phenol
  3.    glycol
  4.    ether
 Discuss Question
Answer: Option B. -> phenol
Answer: (b).phenol
Question 55. Lattice energy of LiCl in kilo joule per mole is
  1.    −833
  2.    900
  3.    −700
  4.    −400
 Discuss Question
Answer: Option A. -> −833
Answer: (a).−833
Question 56. Food can be cooked easily when pressure is
  1.    decreased
  2.    increased
  3.    no effect
  4.    remains same
 Discuss Question
Answer: Option A. -> decreased
Answer: (a).decreased
Question 57. Structure of covalent compounds is
  1.    closed
  2.    open
  3.    compact
  4.    box like
 Discuss Question
Answer: Option B. -> open
Answer: (b).open
Question 58. Diamond is a crystalline cubic form of
  1.    Sulphur
  2.    carbon
  3.    silicon
  4.    gold
 Discuss Question
Answer: Option B. -> carbon
Answer: (b).carbon
Question 59. Nematic is a type of liquid crystal which is based upon
  1.    ordering
  2.    molecules
  3.    surface area
  4.    surface tension
 Discuss Question
Answer: Option A. -> ordering
Answer: (a).ordering
Question 60. Diffraction of light is a property of
  1.    liquids
  2.    gases
  3.    nitrogen
  4.    liquid crystals
 Discuss Question
Answer: Option D. -> liquid crystals
Answer: (d).liquid crystals

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