Hydrogen MCQ Class 11 Chemistry
Please refer to Chapter 9 Hydrogen MCQ Class 11 Chemistry with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 11 Chemistry. Students should refer to MCQ Questions for Class 11 Chemistry with Answers to score more marks in Grade 11 Chemistry exams. Students should read the chapter Hydrogen and then attempt the following objective questions.
MCQ Questions Class 11 Chemistry Chapter 9 Hydrogen
The Hydrogen MCQ Class 11 Chemistry provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.
Question. The normality of30 volume H2O2 is
(a) 2.678 N
(b) 5.336 N
(c) 8.034 N
(d) 6.685 N
Question. Among CaH2 , NH3NaH and B2H6 , which are covalent hydride ?
(a) NH3 and B2H6
(b) NaH and CaH2
(c) NaH and NH3
(d) CaH2 and B2H6
Question. Hydrogen molecule differs from chlorine molecule in the following respect.
(a) Hydrogen molecule is non-polar but chlorine molecule is polar
(b) Hydrogen molecule is polar while chlorine molecule is non-polar
(c) Hydrogen molecule can form intermolecular hydrogen bonds but chlorine molecule does not
(d) Hydrogen molecule cannot participate in coordinate bond formation but chlorine molecule can
Question. The most abundant element in the universe is thought to be
Question. Moist hydrogen peroxide cannot be dried over cone. H2SO4 because
(a) it can catch fire
(b) it is reduced by H2SO4
(c) it is oxidised by H2SO4
(d) it is decomposed by H2SO4
Question. The oxidation number of oxygen in hydrogen peroxide is
(a) + l
(b) – 1
(d) – 2
Question. Hydrogen is prepared on large scale for industrial use
(a) by Zn + H2SO4
(b) by Al + NaOH
(c) by Na + C2H5OH
(d) from water gas
Question. Which one of the following is a covalent hydride?
Question. In context with the industrial preparation of hydrogen from water gas (CO+ H2 ), which of the following is the con-ect statement?
(a) CO and H2 are fractionally separated using differences in their densities
(b) CO is removed by absorption in aqueous Cu2Cl2 solution
(c) H2 is removed through occlusion with Pd
(d) CO is oxidised to CO2 with steam in the presence of a catalyst followed by absorption of CO2 in alkali
Question. The strength of 10 volume of H2O2 solution is
(a) IO g/L
(b) 68 g/L
(c) 60.70 g/L
(d) 30.36 g/L
Question. Which of the following is responsible for the hardness of water?
(c) Both (a) and (b)
(d) None of these
Question. When H2O2 is shaken with an acidified solution of K2Cr2O7 in the presence of ether, the ethereal layer twns blue due to the formation of
(c) Cr2 (SO)3
Question. Which of the following is not cotTect regarding the electrolytic preparation of H2O2 ?
(a) Lead is used as cathode
(b) 50% H2SO4 is used
(c) Hydrogen is liberated at anode
(d) Sulphuric acid undergoes oxidation
Question. Commercial sample of H2O2 is labeled as 10 V. Its % strength is nearly
Question. Temporary hardness process by adding of water is removed in Clark’s
Question. The volume strength of 1.5 NH2O2 solution is
(a) 16.8 L
(b) 8.4 L
(c) 4.2 L
(d) 5.2 L
Question. The ortho and para hydrogen differ in respect of which of the following?
(a) In the molecular weight
(b) In the nature of spin of protons
(c) In the nature of spin of electrons
(d) In the number of protons
Question. Which one of the following is used for reviving the exhausted ‘permutit’ ?
(a) HCl solution
(b) IO% CaCl2 solution
(c) 10% MgCl2 solution
(d) 10% NaCl solution
Question. The production of dihydrogen gas via water gas shift . a reaction, CO(g) + H2O(g) →CatalystΔ CO2 (g) + H2 (g ). The CO2 gas is removed by scmbbing with solution of
(a) sodium arsenite
(b) calcium oxide
(c) sodium phosphite
(d) aluminium oxide
Question. Very pure hydrogen (99.9) can be made by which of the 2010 following processes?
(a) Reaction of methane with steam
(b) Mixing natural hydrocarbons of high molecular weight
(c) Electrolysis of water
(d) Reaction of salts like hydrides with water
Question. Which of the following is not correct for D2O?
(a) Boiling point is higher than H2O
(b) D2Oreacts slowly than H2O
(c) Viscosity is higher than H2Oat 25°C
(d) Solubility of NaCl in it is more than H2O
Question. Which one of the following reactions gaseous product ?
(a) PbO2 + H2O2 →
(b) Acidified KMnO4 + H2O2 →
(c) PbS + H2O2 →
(d) CI2 + H2O2 →
Question. The pH of a solution of H2O2 is 6.0. Some chloride gas is bubbled into this solution. Which of the following is correct ?
(a) The pH of resultant solution becomes 8.0
(b) Hydrogen gas is liberated from resultant solution
(c) The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated
(d) Cl2O is formed in the resultant solution
Question. Which one of the following processes will produce hard water ?
(a) Saturation of water with CaCO3
(b) Saturation of water with MgCO3
(c) Saturation of water with CaSO4
(d) Addition ofNa 2SO4 to water
Question. The hardness of water sample containing 0.002 mole of magnesium sulphate dissolved in a litre of water is expressed as
(a) 20 ppm
(b) 200 ppm
(c) 2000 ppm
(d) 240 ppm
Question. Calgon used as water softener is
(a) Na2 [Na4 (PO3)6]
(b) Na2 [Na4 (PO3)5]
(c) Na4 [Na2 (PO3)6]
Question. The volume of oxygen liberated from 0.68 g of H2O2 is
(a) 112 mL
(b) 224 mL
(c) 56 mL
(d) 336 mL
Question. Adsorbed. hydrogen by palladium is known as
Question. Permanent hardness can be removed by adding
(c) Ca(OCl) Cl
Question. In which of the following reactions, H2O2 is acting as a reducing agent?
(a) SO2 + H2O2 → H2SO4
(b) 2KI + H2O2 → 2KOH + I2
(c) PbS + 4H2O2 → PbSO4 + 4H2O
(d) Ag2O + H2O2 → 2Ag+ H2O+ O2
Question. Which of the following statements is correct? Dielectric constant of H2O2
(a) increases with dilution
(b) decreases with dilution
(c) is unaffected on dilution
(d) None of these
Question. In transforming 0.01 mole of PbS to PbSO4, the volume of 10. volume H2O2 required will be
(a) 11.2 mL
(b) 22.4 mL
(c) 33.6 mL
(d) 44.8 mL
Question. Hydrogen is not obtained when Zn reacts with
(a) cold water
(b) hot NaOH solution
(c) dil. H2SO4
(d) dil. HCl
Question. H2O2 is manufactured these days
(a) by the action of H2O2on BaO2
(b) by the action of H2O2 on H2O2
(c) by electrolysis of 50% H2SO4
(d) by burning hydrogen in excess of oxygen
Question. Ka of H2O2 isoftheorderof
Question. Heavy water is represented as
Question. Decomposition of H2O2 is prevented by
(d) oxalic acid
Question. 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.
(a) Both A and R are co1Tect and R is the correct explanation of A
(b) Both A and R are correct but R is not the correct explanation of A
(c) A is correct but R is not correct
(d) A is not correct but R is correct
Question. Which of the following is an exan1ple of interstitial hydride?
Question. Which cannot be oxidised by H2O2 ?
Question. H2O2 is formed by which of the following compounds?
Question. Which is false about H2O2 ?
(a) Act as both oxidising and reducing agent
(b) Two OH bonds lie in the same plane
(c) Pale blue liquid
(d) Can be oxidised by ozone
Question. Electrolysis ofX gives Yat anode. Vacuum distillation of Y gives H2O2. The number ofperoxy (O—O) bonds present in X and Y respectively are
(a) 1 ,1
(b) 1 ,2
(c) zero, 1
(d) zero, zero
Question. What is formed when calcium carbide react with heavy water?
Question. Water possesses a high dielectric constant, therefore
(a) it always contains ions
(b) it is universal solvent
(c) can dissolve covalent compounds
(d) can conduct electricity
Question. What is the volume of ’20 volume H2O2 ‘ required to get 5000 cm3 of oxygen at STP ?
(a) 250 cm3
(b) 20 cm3
(c) 100 cm3
(d) 125 cm3
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