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MCQs

Total Questions : 217 | Page 19 of 22 pages
Question 181. In a positive test, yellow precipitate formed will be of
  1.    tri-iodomethane` only
  2.    iodoform only
  3.    iodo-alkane
  4.    tri-iodomethane and iodoform
 Discuss Question
Answer: Option D. -> tri-iodomethane and iodoform
Answer: (d).tri-iodomethane and iodoform
Question 182. If one half of an equation shows oxidation and remaining half reflects reduction then we call them as
  1.    half equation
  2.    oxidation equation
  3.    reduction equation
  4.    Redox-equation
 Discuss Question
Answer: Option A. -> half equation
Answer: (a).half equation
Question 183. The reduction is a gain of
  1.    electrons
  2.    protons
  3.    neutrons
  4.    oxygen
 Discuss Question
Answer: Option A. -> electrons
Answer: (a).electrons
Question 184. Gain of oxygen is known as
  1.    oxidation
  2.    reduction
  3.    halogenation
  4.    chlorination
 Discuss Question
Answer: Option A. -> oxidation
Answer: (a).oxidation
Question 185. In a balanced equation, the number of electrons gain and loss must be
  1.    equal
  2.    high
  3.    low
  4.    equilibrium
 Discuss Question
Answer: Option A. -> equal
Answer: (a).equal
Question 186. The lowest relative melting point among the four oxides is of
  1.    SO₂ (g)
  2.    SO₃
  3.    P₄O₁₀
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 187. Oxidation state +2 of a compound have greater ionic character than oxidation state of
  1.    +1
  2.    +3
  3.    +4
  4.    +5
 Discuss Question
Answer: Option C. -> +4
Answer: (c).+4
Question 188. Element to oxidize with low oxidation state needs
  1.    high energy
  2.    less energy
  3.    constant energy
  4.    no energy
 Discuss Question
Answer: Option B. -> less energy
Answer: (b).less energy
Question 189. The relative stability of oxidation states +2 and +4 decreases
  1.    down the group
  2.    across the period
  3.    up the group
  4.    diagonally
 Discuss Question
Answer: Option A. -> down the group
Answer: (a).down the group
Question 190. Oxide with very high relative melting point is
  1.    Na₂O
  2.    MgO
  3.    Al₂O₃
  4.    SiO₂
 Discuss Question
Answer: Option C. -> Al₂O₃
Answer: (c).Al₂O₃

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