p-Block Elements  MCQs

MCQs of p-Block Elements

Showing 161 to 170 out of 173 Questions
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161.
Mention the strongest oxidizing agent from the following.
(a) I2
(b) Cl2
(c) F2
(d) Br2
Answer:

Option (c)

162.
(1) 4Cu(s) + X → 4Cu (NO3)2 (aq) + N2O(g) + 5H2O(l)

(2) 3Cu(s) + Y → 3Cu (NO3)2 (aq) + 2NO(g) + 4H2O(l)

(3) 3Cu(s) + Z → 3Cu (NO3)2 (aq) + 2NO2(g) + 2H2O(l)

In these equations, mention X, Y and Z.

(a) X = HNO3 (dil. aq.), Y = HNO3 (10-30% aq.), Z = HNO3 (conc. aq.)
(b) X = HNO3 (dil. aq.), Y = HNO3 (aq.), Z = HNO3 (conc. aq.)
(c) X = HNO3 (aq.), Y = HNO3 (10-30% aq.), Z = HNO3 (aq.)
(d) X = HNO3 (dil.), Y = HNO3 (dil. aq.), Z = HNO3 (conc. aq.)
Answer:

Option (a)

163.
Mention the proper choice for the true and false statements. For true statement T and for false statement F has to be mentioned.

(a) Oxygen element possesses -2, -1, 1, 2 oxidation states.

(b) Ozone is colourless in solid form.

(c) The value of electron gain enthalpy of CI element is more negative than that of F element.

(d) Chlorine water when kept for longer time loses yellow colour.

(a) TFTF
(b) TTFT
(c) TFTT
(d) FTFT
Answer:

Option (c)

164.
Which of the following reaction shows the oxidising nature of H2SO4 ?
(a) Ca(OH)2 + H2SO4 → CaSO4 + 2H2O
(b) NaCl + H2SO4 → NaHSO4 + HCl
(c) 2PCl5 + H2SO4 → 2POCl3 + 2HCl + SO2Cl2
(d) 2HI + H2SO4 → I2 + SO2 + 2H2O
Answer:

Option (d)

165.
Which xenon compound is not possible in following chemical reaction ?
(a) XeO3 + 6HF → XeF6 +3H2O
(b) 3XeF4 + 6H2O → 2Xe + XeO3 +12HF +15O2
(c) 2XeF2 + 2H2O → 2Xe + 4HF +O2
(d) XeF6 + RbF → Rb[XeF7]
Answer:

Option (a)

166.
Which of the following reactions is called charring ?
(a) Cs+2H2SO4conc.l→ Cg+2SO4g+2H2Ol
(b) C12H22O11s→H2SO4 12Cs+11H2Og
(c) Ss+2H2SO4conc.l→ 3SO2g+2H2Ol
(d) C12H22O11s→H2S2O7 12Cs+11H2Og
Answer:

Option (b)

167.
Which of the following equations is correct ?
(a) Cu + 2H2SO4 → CuSO4+ SO2 + 2H2O
(b) Cu + H2SO4 → CuSO4+ H2
(c) 2Cu + 3H2SO4 → 2CuSO4+ 3H2O + SO2
(d) Cu + 3H2SO4 → CuSO4+ 2SO2 + 3H2O
Answer:

Option (a)

168.
Which of the rows in the following arrangement is not according to the property mentioned against it ?
(a) B < C < O < N

The first ionisation enthalpy increases.

(b) CO2 < SiO2 < SnO2 < PbO2

The strength as oxidising agent increases.

(c) HF < HCl < HBr < HI

Acidic strength is increases.

(d) NH3 < PH3 < AsH3 < SbH3

Basic strength increases.

Answer:

Option (d)

169.
Which of the rows in the following arrangements is not according to the property mentioned ?
(a) F2 > Cl2 > Br2 > I2 Bond dissociation energy.
(b) F2 > Cl2 > Br2 > I2 Strength as oxidising agent.
(c) HI > HBr > HCl > HF Acidic strength in aqueous solution.
(d) F2 > Cl2 > Br2 > I2 Electronegativity
Answer:

Option (a)

170.
(1) 4HClg+ O2g  →X 2Cl2g+ 2H2Og(2) 2H2O2aq →HeatY 2H2Ol+ O2gMention the formulas of X and Y.
(a) X = CuCl2,   Y = NO2
(b) X = Cu2Cl2,   Y = MnO2
(c) X = CuCl2,   Y = MnO2
(d) X = V2O5,   Y = MnO2
Answer:

Option (c)

Showing 161 to 170 out of 173 Questions
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