Ions And Gases(Chemistry ) Questions and Answers

Question 1. Titration is process to
  1.    get salts by acids reacting with metals
  2.    get salts by acids reacting with alkalis
  3.    get salts by acids reacting with metal oxides
  4.    all of these
Explanation:-
Answer: Option B. -> get salts by acids reacting with alkalis
Answer: (b).get salts by acids reacting with alkalis
Question 2. CuO + H₂SO₄ → CuSO₄. other by product is
  1.    water
  2.    hydrogen gas
  3.    oxygen gas
  4.    Copper crystals
Explanation:-
Answer: Option B. -> hydrogen gas
Answer: (b).hydrogen gas
Question 3. In titration, end point is indicated through
  1.    precipitation of salt
  2.    crystallization of salt
  3.    change in the color of solution
  4.    a pink color
Explanation:-
Answer: Option C. -> change in the color of solution
Answer: (c).change in the color of solution
Question 4. In order to test presence of carbonates (CO₃-2)
  1.    dilute HNO₃ shall be added
  2.    dilute HCl shall be added
  3.    dilute NaOH shall be added
  4.    dilute nitric acid is added accompanied by aluminum foil
Explanation:-
Answer: Option B. -> dilute HCl shall be added
Answer: (b).dilute HCl shall be added
Question 5. If reactants are CuCO₃ + H₂SO₄, products will be
  1.    CuSO₄
  2.    H₂O
  3.    CO₂
  4.    all of these
Explanation:-
Answer: Option D. -> all of these
Answer: (d).all of these
Question 6. There is more stability in carbonate its oxide and carbon dioxide with more positive
  1.    enthalpy change
  2.    polarizability
  3.    charge
  4.    reaction chain
Explanation:-
Answer: Option A. -> enthalpy change
Answer: (a).enthalpy change
Question 7. An anion will be polarized if
  1.    cations is small only
  2.    anion is large only
  3.    cation is large
  4.    cation is small and anion is large
Explanation:-
Answer: Option D. -> cation is small and anion is large
Answer: (d).cation is small and anion is large
Question 8. Greater polarization of carbonate ion will result in weak
  1.    C-H bond
  2.    C-C bond
  3.    H-H bond
  4.    C=C bond
Explanation:-
Answer: Option A. -> C-H bond
Answer: (a).C-H bond
Question 9. The quality to attract electrons and distort an anion is called
  1.    charge power
  2.    ion power
  3.    lattice power
  4.    polarizing power
Explanation:-
Answer: Option D. -> polarizing power
Answer: (d).polarizing power
Question 10. Group II nitrates decompose to give off
  1.    oxide
  2.    nitrogen dioxide
  3.    oxygen
  4.    all of above
Explanation:-
Answer: Option D. -> all of above
Answer: (d).all of above
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