1333 + Interview Questions in HYDROGEN IN GENERAL AWARENESS Page 9 InterviewSolution

401.	If an isotope of hydrogen has two neutrons in its atom, its atomic number and mass number will respectively beA. 2 and 1B. 3 and 1C. 1 and 1D. 1 and 3
Answer» Correct Answer - D At. No. = 1 (all isotopes have same at. `no`.) Mass No. = P+N=1+2=3.

Discussion

402.	Calgon is an industrial name given toA. normal sodium phosphateB. sodium meta-aluminateC. sodium hexametaphosphateD. hydrated sodium aluminium silicate
Answer» Correct Answer - B

Discussion

403.	Name the radioactive isotope of hydrogen?
Answer» Tritium is radioactive isotope of hydrogen

Discussion

404.	Hydrogen has three isotopes, the number of possible diatomic molecules will beA. 2B. 6C. 9D. 12
Answer» Correct Answer - B `H^(1)H^(1),H^(1)H^(2),H^(1)H^(3),H^(2)H^(2),H^(3)H^(3),H^(2)H^(3)`

Discussion

405.	Hydrogen is `:`A. electropositiveB. electronegativeC. both electropositive and electronegativeD. neither electropositive nor electronegative.
Answer» Correct Answer - c In electronegative of hydrogen is in between metals and non`-` metals so it behaves as both electro`+ve` and electro `-ve` . It can lose electron to form `H^(+)` ion and it can also gain electron to form `H^(-)` ion.

Discussion

406.	Hydrogen ion `H^(-)` is isoelectronic withA. LiB. HeC. `H^(+)`D. `Li^(-)`
Answer» Correct Answer - B `H^(-)= 1s^(2),He=1s^(2)`

Discussion

407.	Write one property of Hydrogen common to alkali metal.
Answer» Both have +1 oxidation state.

Discussion

408.	Compare the structures of `H_(2)O and H_(2)O_(2)`.
Answer» The structure of `H_(2)O` is angular white that of `H_(2)O_(2)` is non linear just like two opposite open pages of a book. For actual structure of `H_(2)O`

Discussion

409.	The property of hydrogen which distinguishes it from alkali metals isA. Its electropositive characterB. Its affinity for non`-`metalC. Its reducing characterD. Its non`-`metallic character
Answer» Correct Answer - d Hydrogen is a non `-` metal while all other members of group `1 (` alkali metals `)` are metals.

Discussion

410.	The difference between heat of adsorption of ortho and para hydrogen isA. `04kJmol^(-1)`B. `08 kJmol^(-1)`C. ZeroD. None.
Answer» Correct Answer - A It is 0.4 kJ.

Discussion

411.	Which of the following produces hydrolith with dihydrogen ?A. MgB. AlC. CuD. Ca.
Answer» Correct Answer - D `CaH_(2)` is known as hydrolith.

Discussion

412.	Describe the bulk preparation of dihydrogen by electrolytic method. What is the role of an electrolyte in this process?
Answer» Dihydrogen is prepared by the electrolysis of acidified of alkaline water using platinum electrodes. Generally, 15-20% of an acid `(H_(2)SO_(4))` or a base (NaOH) is used Reduction of water occurs at the cathode as: `2OH^(-) to H_(2)O+(1)/(2)O_(2)+2e^(-)` `therefore` Net reaction can be represented as: `H_(2)O_(l) to H_(2_(s))+(1)/(2_(g))` Electrical conductivity of pure water is ver low owing to the absence of ions in it. Therefore, electrolysis of pure water also takes at a low rate. If an electrolyte such as an acid or a base is added to the process, the rate of electrolysis increases. The addition of the electrolyte makes the ions available in the process for the conduction of electrolysis to take places.

Discussion

413.	The adsorption of hydrogen by metals is called :A. DehydrogenationB. HydrogenationC. OcculsionD. Adsorption.
Answer» Correct Answer - C Occulsion is the phenomenon of adsorption of hydrogen by metal.

Discussion

414.	In the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Of the statements, mark the correct answer as –(A) If both assertion and reason are true, and reason is the true explanation of the assertion.(B) If both assertion and reason are true, but reason is not the true explanation of the assertion.(C) If assertion is true, but reason is false.(D) If both assertion and reason are false.Assertion (A).Dihydrogen oxidizes sodium to sodium hydride.Reason (R). Hydrogen can act only as a reducing agent.
Answer» (C) If assertion is true, but reason is false.

Discussion

415.	Why does hydrogen occur in diatomic form rather than in monotomic form under normal conditions?
Answer» In monoatomic form, hydrogen atom has only one electron in K-shell `(1s^(1))` while in diatomic form, the K-shell is complete `(1s^(2))`. This means that in diatomic form, hydrogen `(H_(2))` has aquired the configuration of boble gas helium. It is therefore, quite satble.

Discussion

416.	Assertion. Dihydrogen oxidises sodium to sodium hydride. Reason. Hydrogen can act only as a reducing agent.
Answer» Correct Answer - C Correct reason. Hydrogen acts as oxidising agent towards highly electropositive metals like Na, Ca , etc.

Discussion

417.	Sodium sulphate is soluble in water but barium sulphate is insoluble becauseA. the hydration energy of `Na_(2)SO_(4)` is more than its lattice energyB. the lattice energy of `BaSO_(4)` is more than its hydration energyC. the lattice energy has no role to play in solubilityD. Both A and B.
Answer» Correct Answer - D Hydration energy of `Na_(2)SO_(4)` is more than its lattice energy of `BaSO_(4)` is more than its hydration energy.

Discussion

418.	The composition of tritium isA. 1 electron, 1 proton, 1 neutronB. 1 electron, 2 proton, 1 neutronC. 1 electron, 1 proton, 2 neutronD. 1 electron, 1 proton, 3 neutron
Answer» Correct Answer - C An atom of tritium contains 1 proton, 1 electron and neutrons.

Discussion

419.	Hydrogen does not combine withA. AntimonyB. SodiumC. BismuthD. Helium.
Answer» Correct Answer - D Helium is a noble gas and does not combine with hydrogen.

Discussion

420.	The volume of `O_(2)` liberated from 0.96g of `H_(2)O_(2)` isA. 224.6 mLB. 320.5mLC. 390.0 mLD. 112.5 mL
Answer» Correct Answer - B

Discussion

421.	Which of the following metals directly combine with hydrogen gas to give a hydride ?A. AuB. NiC. CaD. Cu
Answer» Correct Answer - C Hydrogen directly combines with highly reactive metals to give hydrides. `Ca+H_(2)to CaH_(2)`

Discussion

422.	Ionisation energy of hydrogen isA. Equal to that of fluorineB. Lower than that of fluorineC. slightly higher than that of fluorineD. Much higher than that of fluorine
Answer» Correct Answer - B

Discussion

423.	Which position for hydrogen explain all its properties ?A. At the top of halogensB. At the top of alkali metalsC. At the top of chacogensD. Both 1 and 2
Answer» Correct Answer - D

Discussion

424.	Ortho and para hydrogen have `:`A. Identical chemical properties but different physical propertiesB. identical physical and chemical propertiesC. identical physical properties but different chemical propertiesD. different physical and chemical properties
Answer» Correct Answer - A Ortho & parahydrogen have identical chemaicla properties but different physical properties.

Discussion

425.	Assertion (A) `H_(2)O_(2)` is not stored in glass bottles. Reason (R ) Alkali oxides present in glass catalyse the decomposition of `H_(2)O_(2)`A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is falesD. A is fales but R is true.
Answer» Correct Answer - A Both assertion (A) and reason (R ) are true and R in the correct explanation A.

Discussion

426.	Write one chemical reaction for the preparation of `D_(2)O_(2)`.
Answer» By the action of `D_(2)SO_(4)` in dissolved in water over `BaO_(2)` `BaO_(2) + D_(2)SO_(4) to BaSO_(4) + D_(2)O_(2)`

Discussion

427.	The bleaching of `H_(2)O_(2)` are due to its :A. Oxidising natureB. Reducing natureC. Acidic natureD. Thermal instability
Answer» Correct Answer - A `H_(2)O_(2)rarrH_(2)O+[O]` Bleaching action due to formation of Nascent oxygen (Oxidation).

Discussion

428.	The volume strength of `1.5 N H_2O_2` solution isA. `4.8 L`B. `5.2 L`C. `8.4 L`D. `8.8 L`
Answer» Correct Answer - c Volume strength` =5.6 xx` Normality `=5.6 xx 1.5 =8.4 L`

Discussion

429.	Which of the following pair of ions makes the water hard ?A. `Na^(+),SO_(4)^(2-)`B. `Ca^(2+),HCO_(3)^(-)`C. `Ca^(2+),NO_(3)^(-)`D. `NH_(4)^(+),Cl^(-)`
Answer» Correct Answer - b `HCO_(3) ^(-)` is main reason of temporary hardness of water.

Discussion

430.	Group 2 hydrides with significant covalent character is/areA. `BeH_(2)`B. `MgH_(2)`C. Both (A) and (B)D. None.
Answer» Correct Answer - C `BeH_(2)` and `MgH_(2)` have significant covalent character.

Discussion

431.	Systematic name of `H_(2)O` isA. waterB. hydrogen oxideC. oxidaneD. None of these.
Answer» Correct Answer - C Systematic name of water is oxidane.

Discussion

432.	Write one chemical reactions for the preparation of `D_(2)O_(2)`.
Answer» It is prepared by the action of heavy water on dipotassium peroxodisulphate `K_(2)S_(2)O_(8)(s)+D_(2)O(l) to underset("Postassium sulphate")underset("Deuterated")(2KDSO_(4)(aq))+underset("hydrogen peroxide")underset("Deuterated")(D_(2)O_(2)(l)`

Discussion

433.	Decomposition of `H_(2)O_(2)` is retarded by : `2H_(2)O_(2)(l) rarr 2H_(2)O(l)+O_(2)(g)`A. B. `MnO_(2)`C. `Zn`D. Colloidal Ni
Answer» Correct Answer - A Decomposition of `H_(2)O_(2)` retarted by addition of inhibitor like Acetanilide.

Discussion

434.	Correct ORDER of acidity & dielectric constant isA. `H_(2)O_(2)gtD_(2)OgtH_(2)O`B. `D_(2)OgtH_(2)O_(2)gtH_(2)O`C. `H_(2)O_(2)gtH_(2)OgtD_(2)O`D. None
Answer» Correct Answer - C `H_(2)O_(2)gtH_(2)OgtD_(2)O`

Discussion

435.	Which of the following statements is not correct?A. `H_(2)O_(2)` oxidises Fe(II) to Fe(II)B. `H_(2)O_(2)` can be prepared by the electrolysis of dilute `H_(2)SO_(4)`C. `H_(2)O_(2)` reduces Mn(VII)toM(V)D. `H_(2)O_(2)` is weak base.
Answer» (d) `H_(2)O_(2)` cannot acts as the base

Discussion

436.	The volume strength of 1.5 `H_(2)O_(2)` solutions isA. `4.8`B. `8.4`C. `3.0`D. `8.0`
Answer» (b) Volume strength=`Nxx5.6=1.5xx5.6=8.4`

Discussion

437.	How does CaC2 react with heavy water?
Answer» CaC₂ + 2D₂O → Ca(OD)₂ calcium deuteroxide + C₂D₂ Deuteroethyne

Discussion

438.	Describe the industrial use of hydrogen which depends on (a) the heat liberated when it burns (b) its ability to react with vegetable oil in the presence of a catalyst (c) its ability to unite with N2.
Answer» (a) It is used in oxy-hydrogen flame for welding purpose. (b) It is used to manufacture vanaspati ghee. (c) It is used for manufacture of NH₃.

438.

Describe the industrial use of hydrogen which depends on (a) the heat liberated when it burns (b) its ability to react with vegetable oil in the presence of a catalyst (c) its ability to unite with N2.

Answer»

(a) It is used in oxy-hydrogen flame for welding purpose.

(b) It is used to manufacture vanaspati ghee.

(c) It is used for manufacture of NH₃.

Discussion

439.	Which of the substances present in water cause permanent hardness of water?
Answer» CaSO₄, MgSO₄, CaCl₂and MgCl₂ cause permanent hardness of water.

Discussion

440.	How would you prepare dihydrogen from water by using a reducing agent?
Answer» 2Na + 2H₂O → 2NaOH + H₂

Discussion

441.	How would you prepare dihydrogen from a substance other than water?
Answer» Zn + 2HCl → ZnCl₂ + H₂

Discussion

442.	How would you prepare heavy hydrogen in the laboratory?
Answer» It is obtained by electrolysis of heavy water.

Discussion

443.	Permanent hardness cannot be removed by: (a) Adding washing soda to water, (b) Boiling water, (c) Adding sodium polymetaphosphate to water, (d) Passing water through ion exchange resins.
Answer» The answer is (b) Boiling water

Discussion

444.	How would you prepare very pure H2 in the laboratory?
Answer» It is obtained by electrolysis of acidified water.

Discussion

445.	How is pure H2 obtained?
Answer» Pure H₂ and O₂are obtained by electrolysis of acidified H₂O.

Discussion

446.	What is source of sun’s energy?
Answer» Nuclear fusion reaction.

Discussion

447.	Assertion `:` Nascent hydrogen is more reactive than molecular hydrogen. Reason `:` Nascent hydrogen is associated with more energyA. if both the assertion and reason are true and reason is true explanation of the assertion.B. If both the assertion and reason are true but the reason is not the correct explanation of assertion.C. If the assertion is true but reason is false.D. If assertion if false but reason is true.
Answer» Correct Answer - a Both assertion and reason are true and the reason is the correcct explanation of the assertion.

Discussion

448.	What is molar mass of heavy water?
Answer» Molar mass of heavy water is 20 g mol^-1

Discussion

449.	Which type of bond is presents in water molecule?
Answer» Covalent bond and inter molecular Hydrogen bond.

Discussion

450.	The binary compound of Hydrogen with S block elements are called as -------------.
Answer» ionic hydride..........

Discussion

Explore topic-wise InterviewSolutions in .

If an isotope of hydrogen has two neutrons in its atom, its atomic number and mass number will respectively beA. 2 and 1B. 3 and 1C. 1 and 1D. 1 and 3

Calgon is an industrial name given toA. normal sodium phosphateB. sodium meta-aluminateC. sodium hexametaphosphateD. hydrated sodium aluminium silicate

Name the radioactive isotope of hydrogen?

Hydrogen has three isotopes, the number of possible diatomic molecules will beA. 2B. 6C. 9D. 12

Hydrogen is `:`A. electropositiveB. electronegativeC. both electropositive and electronegativeD. neither electropositive nor electronegative.

Hydrogen ion `H^(-)` is isoelectronic withA. LiB. HeC. `H^(+)`D. `Li^(-)`

Write one property of Hydrogen common to alkali metal.

Compare the structures of `H_(2)O and H_(2)O_(2)`.

The property of hydrogen which distinguishes it from alkali metals isA. Its electropositive characterB. Its affinity for non`-`metalC. Its reducing characterD. Its non`-`metallic character

The difference between heat of adsorption of ortho and para hydrogen isA. `0*4kJmol^(-1)`B. `0*8 kJmol^(-1)`C. ZeroD. None.

Which of the following produces hydrolith with dihydrogen ?A. MgB. AlC. CuD. Ca.

Describe the bulk preparation of dihydrogen by electrolytic method. What is the role of an electrolyte in this process?

The adsorption of hydrogen by metals is called :A. DehydrogenationB. HydrogenationC. OcculsionD. Adsorption.

Why does hydrogen occur in diatomic form rather than in monotomic form under normal conditions?

Assertion. Dihydrogen oxidises sodium to sodium hydride. Reason. Hydrogen can act only as a reducing agent.

Sodium sulphate is soluble in water but barium sulphate is insoluble becauseA. the hydration energy of `Na_(2)SO_(4)` is more than its lattice energyB. the lattice energy of `BaSO_(4)` is more than its hydration energyC. the lattice energy has no role to play in solubilityD. Both A and B.

The composition of tritium isA. 1 electron, 1 proton, 1 neutronB. 1 electron, 2 proton, 1 neutronC. 1 electron, 1 proton, 2 neutronD. 1 electron, 1 proton, 3 neutron

Hydrogen does not combine withA. AntimonyB. SodiumC. BismuthD. Helium.

The volume of `O_(2)` liberated from 0.96g of `H_(2)O_(2)` isA. 224.6 mLB. 320.5mLC. 390.0 mLD. 112.5 mL

Which of the following metals directly combine with hydrogen gas to give a hydride ?A. AuB. NiC. CaD. Cu

Ionisation energy of hydrogen isA. Equal to that of fluorineB. Lower than that of fluorineC. slightly higher than that of fluorineD. Much higher than that of fluorine

Which position for hydrogen explain all its properties ?A. At the top of halogensB. At the top of alkali metalsC. At the top of chacogensD. Both 1 and 2

Ortho and para hydrogen have `:`A. Identical chemical properties but different physical propertiesB. identical physical and chemical propertiesC. identical physical properties but different chemical propertiesD. different physical and chemical properties

Write one chemical reaction for the preparation of `D_(2)O_(2)`.

The bleaching of `H_(2)O_(2)` are due to its :A. Oxidising natureB. Reducing natureC. Acidic natureD. Thermal instability

The volume strength of `1.5 N H_2O_2` solution isA. `4.8 L`B. `5.2 L`C. `8.4 L`D. `8.8 L`

Which of the following pair of ions makes the water hard ?A. `Na^(+),SO_(4)^(2-)`B. `Ca^(2+),HCO_(3)^(-)`C. `Ca^(2+),NO_(3)^(-)`D. `NH_(4)^(+),Cl^(-)`

Group 2 hydrides with significant covalent character is/areA. `BeH_(2)`B. `MgH_(2)`C. Both (A) and (B)D. None.

Systematic name of `H_(2)O` isA. waterB. hydrogen oxideC. oxidaneD. None of these.

Write one chemical reactions for the preparation of `D_(2)O_(2)`.

Decomposition of `H_(2)O_(2)` is retarded by : `2H_(2)O_(2)(l) rarr 2H_(2)O(l)+O_(2)(g)`A. B. `MnO_(2)`C. `Zn`D. Colloidal Ni

Correct ORDER of acidity & dielectric constant isA. `H_(2)O_(2)gtD_(2)OgtH_(2)O`B. `D_(2)OgtH_(2)O_(2)gtH_(2)O`C. `H_(2)O_(2)gtH_(2)OgtD_(2)O`D. None

Which of the following statements is not correct?A. `H_(2)O_(2)` oxidises Fe(II) to Fe(II)B. `H_(2)O_(2)` can be prepared by the electrolysis of dilute `H_(2)SO_(4)`C. `H_(2)O_(2)` reduces Mn(VII)toM(V)D. `H_(2)O_(2)` is weak base.

The volume strength of 1.5 `H_(2)O_(2)` solutions isA. `4.8`B. `8.4`C. `3.0`D. `8.0`

How does CaC2 react with heavy water?

Describe the industrial use of hydrogen which depends on (a) the heat liberated when it burns (b) its ability to react with vegetable oil in the presence of a catalyst (c) its ability to unite with N2.

Which of the substances present in water cause permanent hardness of water?

How would you prepare dihydrogen from water by using a reducing agent?

How would you prepare dihydrogen from a substance other than water?

How would you prepare heavy hydrogen in the laboratory?

Permanent hardness cannot be removed by: (a) Adding washing soda to water, (b) Boiling water, (c) Adding sodium polymetaphosphate to water, (d) Passing water through ion exchange resins.

How would you prepare very pure H2 in the laboratory?

How is pure H2 obtained?

What is source of sun’s energy?

What is molar mass of heavy water?

Which type of bond is presents in water molecule?

The binary compound of Hydrogen with S block elements are called as -------------.

The difference between heat of adsorption of ortho and para hydrogen isA. `04kJmol^(-1)`B. `08 kJmol^(-1)`C. ZeroD. None.