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MCQs

Total Questions : 212 | Page 2 of 22 pages
Question 11. Acidic oxides neutralize
  1.    bases
  2.    alkalis
  3.    salt solutions
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 12. Blood has an approximate pH of
  1.    3 to 4
  2.    7 to 8
  3.    10 to 11
  4.    13 to 14
 Discuss Question
Answer: Option B. -> 7 to 8
Answer: (b).7 to 8
Question 13. In Universal indicators, red color shows a pH of
  1.    0 to 3
  2.    1 to 3
  3.    1 to 7
  4.    0 to 7
 Discuss Question
Answer: Option A. -> 0 to 3
Answer: (a).0 to 3
Question 14. Common salt is
  1.    acidic
  2.    alkaline
  3.    neutral
  4.    basic
 Discuss Question
Answer: Option C. -> neutral
Answer: (c).neutral
Question 15. In Universal indicators, weak acids are represented through a color of
  1.    Reddish orange
  2.    Orange
  3.    Yellow
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 16. Consider equation PbO + NaOH + H₂O → Na₂Pb(OH)₄. balancing of equation requires how much moles of NaOH?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 17. In solution, acids
  1.    become ionic
  2.    cannot act as covalent
  3.    become electrolyte
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 18. CaCO₃ + HCl →
  1.    Ca(OH)₂ + H₂O
  2.    CaCl₂ +H₂O
  3.    CaCl₂ + H₂ + C(s)
  4.    CaCl₂ + H₂O + CO₂
 Discuss Question
Answer: Option D. -> CaCl₂ + H₂O + CO₂
Answer: (d).CaCl₂ + H₂O + CO₂
Question 19. Consider equation Al₂O₃ + NaOH + H₂O →NaAl(OH)₄. Moles of H₂O required to balance equation would be
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3
Question 20. In Universal indicators, violet color indicates
  1.    strong acids
  2.    strong alkalis
  3.    weak acids
  4.    weak bases
 Discuss Question
Answer: Option B. -> strong alkalis
Answer: (b).strong alkalis

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