JEE Questions for Chemistry Hydrogen Quiz 3 - MCQExams.com

The method which can be used for removal of temporary & permanent hardness of water is
  • Decantation
  • Distillation
  • Boiling
  • Filteration
Which of the following reacts easily with H2O to form hydrogen
  • HCl
  • KH
  • NH3
  • B2H6
Calgon softens hard water by
  • Precipation of Ca2+ & Mg2+ ions
  • Coagulation of solts
  • Complexing Ca2+ & Mg2+ ions
  • 1 & 3
The % (mass) of deuterium in heavy water is
  • 18.0
  • Cannot be predicted
  • 11.1
  • 20.0
H2O2 is not used as
  • Oxidising agent
  • Redusing agent
  • Catalyst
  • Bleaching
10 ml of KMnO4 Solution is required it completely oxidise acidic solution of 30 ml of 1.5 Volume strength H2O2.Calculate normality of KMnO4 Solution
  • 0.4
  • 0.65
  • 0.19
  • 0.8
When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A, B, C and D respectively are
  • Na , H2, NaOH, Zn
  • K, H2, KOH, Al
  • Ca, H2, Ca(OH)2, Sn
  • CaC2, C2H2, Ca(OH)2, Fe
Hydrogen molecule differs from chlorine molecule in the following respect.
  • Hydrogen molecule is non-polar but chlorine molecule is polar
  • Hydrogen molecule is polar while chlorine molecule is non-polar
  • Hydrogen molecule can form intermolecular hydrogen bonds but chlorine molecule does not
  • Hydrogen molecule cannot participate in coordinate bond formation but chlorine molecule can
In context with the industrial preparation of hydrogen from water gas (CO + H2), which of the following is the correct statement?
  • CO and H2 are fractionally separated using differences in their densities
  • CO is removed by absorption in aqueous Cu2Cl2 solution
  • H2 is removed through occlusion with Pd
  • CO is oxidised to CO2 with steam in the presence of a catalyst followed by absorption of CO2 in alkali
In which of the following reactions, H2O2 is acting as a reducing agent?
  • SO2 + H2O2 → H2 SO4
  • 2KI + H2O2 → 2KOH + I2
  • PbS + 4H2O2 → PbSO4 + 4H2O
  • Ag2O + H2O2 → 2Ag + H2O + O2
Which one of the following reactions represents the oxidising property of H2O2 ?
  • 2KMnO4 + 3H2 SO4 + 5H2O2 → K2SO4 + 2MnSO4 + 8H2O + 5O2
  • 2K3 [Fe(CN)6 ] + 2KOH + H2O2 → 2K4 [Fe(CN)6] + 2H2O + O2
  • PbO2 + H2O2 → PbO + H2O + O2
  • 2KI + H2 SO4 + H2O2 → K2SO4 + I2 + 2H2O
Assertion (A) NaCl is less soluble in heavy water than in ordinary water.
Reason (R) Dielectric constant of ordinary water is more than that of heavy water.
  • Both A and R are correct and R is the correct explanation of A
  • Both A and R are correct but R is not the correct explanation of A
  • A is correct but R is not correct
  • A is not correct but R is correct
H2O2 is manufactured these days
  • by the action of H2O2 on BaO2
  • by the action of H2O2 on H2O2
  • by electrolysis of 50% H2SO4
  • by burning hydrogen in excess of oxygen
The pH of a solution of H2O2 is 6.0. Some chloride gas is bubbled into this solution. Which of the following is correct ?
  • The pH of resultant solution becomes 8.0
  • Hydrogen gas is liberated from resultant solution
  • The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated
  • Cl2O is formed in the resultant solution
Match the Column I with Column II.
Chemistry-Hydrogen-5095.png
  • A = 6, B = 2, C = 4, D = 5, E = 1
  • A = 6, B = 2, C = 4, D = 3, E = 1
  • A = 6, B = 4, C = 2, D = 3, E = 5
  • A = 6, B = 4, C = 2, D = 3, E = 1
  • A = 5, B = 4, C = 2, D = 3, E = 1
Number of neutrons in the nucleus of tritium (1H3) atom is
  • 1
  • 2
  • 3
  • 4
Heavy water is called as heavy because it
  • Is denser than common water
  • Is an oxide of deuterium
  • Has a heavy or bad taste
  • Has a heavier isotope of oxygen
Water is said to be permanently hard when it contains
  • Chlorides and sulphates of Mg and Ca
  • Bicarbonates of Na and K
  • Carbonates of Na and K
  • Phosphates of Na and K
The absorption of hydrogen by platinum is known as
  • Hydrogenation
  • Reduction
  • Dehydrogenation
  • Occlusion
Temporary hardness may be removed from water by adding
  • Ca(OH)2
  • CaCO3
  • CaSO4
  • HCl
Water can be tested by
  • Smell
  • Taste
  • Hydrated CuSO4
  • Anhydrous CoCl3 (blue) which changes to pink
The melting points of most of the solid substances increase with an increase of pressure acting on them. However, ice melts at a temperature lower than its usual melting point when the pressure is increased. This is because
  • Pressure generates heat
  • The chemical bonds break under pressure
  • Ice is less denser than water
  • Ice is not a true solid
Tritium is a radioactive isotope of hydrogen. It emits
  • Neutrons
  • α–Particles
  • β–Particles
  • γ–Rays
A hydride of nitrogen which is acidic is
  • NH3
  • N2H4
  • N2H2
  • N3H
Heavy water is a compound of
  • Hydrogen and heavier isotope of oxygen
  • Heavier isotope of hydrogen and heavier isotope of oxygen
  • Oxygen and heavier isotope of hydrogen
  • None of the above
When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is
  • 1 : 1
  • 1 : 2
  • 2 : 1
  • 9 : 4
HCl is added to the following oxides. Which one would give H2O2?
  • MnO2
  • PbO2
  • BaO
  • None of the above
Which one of the following statements, if any, regarding hydrogen peroxide is false?
  • It is a strong oxidizing as well as reducing agent in acidic as well as basic medium
  • It is decomposed by MnO2
  • It is more stable in a basic solution
  • It behaves as a reducing agent towards acidified KMnO4
Which of the following can adsorb large volume of hydrogen gas?
  • Colloidal solution of palladium
  • Finely divided nickel
  • Colloidal ferric hydroxide
  • Finely divided platinum
Zeolite, which shows ion exchange ability
  • Is an ion exchange resin
  • Is a closed packed assemblage of silicon and oxygen atoms
  • Is a sodium aluminium silicate
  • Can provide H+ ions in place of Na+ ions.
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Chemistry Quiz Questions and Answers