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MCQs

Total Questions : 212 | Page 8 of 22 pages
Question 71. Chemical formula of Caustic soda is
  1.    NaOH
  2.    KOH
  3.    MgO
  4.    Ca(OH)₂
 Discuss Question
Answer: Option A. -> NaOH
Answer: (a).NaOH
Question 72. Bleach has an approximate of
  1.    5
  2.    8
  3.    11
  4.    14
 Discuss Question
Answer: Option C. -> 11
Answer: (c).11
Question 73. Best indicator of all is
  1.    litmus indicator
  2.    universal indicator
  3.    methyl orange indicator
  4.    Phenolphthalein indicators
 Discuss Question
Answer: Option B. -> universal indicator
Answer: (b).universal indicator
Question 74. Orange juice is
  1.    acidic
  2.    alkaline
  3.    neutral
  4.    basic
 Discuss Question
Answer: Option A. -> acidic
Answer: (a).acidic
Question 75. In Universal indicators, weak alkalis are indicated through
  1.    turquoise color
  2.    blue color
  3.    light violet color
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 76. Weak acids include
  1.    H₂CO₃
  2.    H₂SO₃
  3.    H₂SO₄
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 77. Acids reacts with metal carbonates to form
  1.    salt
  2.    water
  3.    carbon dioxide
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 78. Acid become colorless when added with
  1.    screened methyl orange indicators
  2.    phenolphthalein indicator
  3.    litmus indicator
  4.    universal indicator
 Discuss Question
Answer: Option B. -> phenolphthalein indicator
Answer: (b).phenolphthalein indicator
Question 79. Onion juice is
  1.    acidic
  2.    alkaline
  3.    neutral
  4.    basic
 Discuss Question
Answer: Option A. -> acidic
Answer: (a).acidic
Question 80. Universal indicator can be used to
  1.    test acids and alkalis
  2.    to test strong acids and weak acids
  3.    to test concentration of a particular solution
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b

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