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11th Standard Chemistry Hydrogen English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021

11th Standard

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Chemistry

Time : 00:20:00 Hrs
Total Marks : 20

    Answer all the questions

    20 x 1 = 20
  1. Water gas is

    (a)

    H2O(g)

    (b)

    CO + H2O

    (c)

    CO + H2

    (d)

    CO + N2

  2. Which one of the following is manufactured in Haber's process?

    (a)

    SO3

    (b)

    NH3

    (c)

    N2

    (d)

    H2

  3. Which of the following is used as desiccants to remove moisture from organic solvents?

    (a)

    Calcium hydride

    (b)

    LiAIH4

    (c)

    Sodium boro hydride

    (d)

    Sodium hydride

  4. Which of the following is used for cutting and welding?

    (a)

    Atomic hydrogen and oxy hydrogen torches

    (b)

    Liquid hydrogen

    (c)

    Calcium hydride

    (d)

    Sodium boro hydride

  5. At the temperature conditions of the earth (300K) the OPR of H2O is ------

    (a)

    2.5

    (b)

    3

    (c)

    1

    (d)

    zero

  6. Water does not react with -------

    (a)

    Sodium

    (b)

    Magnesium

    (c)

    Beryllium

    (d)

    Calcium

  7. Consider the following statements.
    (i) Silver, Gold, Mercury and Platinum do not have any effect on water.
    (ii) Carbon, Sulphur and Phosphorous do not react with water.
    (iii) Beryllium reacts with water less violently.
    Which of the following statements is/are not correct?

    (a)

    (i) only

    (b)

    (ii) and (iii)

    (c)

    (iii) only

    (d)

    (ii) only

  8. Which one of the following is used as water softener?

    (a)

    Zeolites

    (b)

    lime

    (c)

    washing soda

    (d)

    bleaching powder

  9. Which type of hydrides are generally non-stoichiometric in nature?

    (a)

    Metallic hydride

    (b)

    Covalent hydrides

    (c)

    Ionic hydride

    (d)

    Saline hydride

  10. Which one of the following is prepared in industry by the auto-oxidation of 2-alkylanthraquional?

    (a)

    Heavy water

    (b)

    Deuterium

    (c)

    Hydrogen peroxide

    (d)

    Tritium

  11. Which one of the following is not a covalent hydride?

    (a)

    Ammonia

    (b)

    Methane

    (c)

    Lithium hydride

    (d)

    water

  12. Which of the following is the correct order of stability of bonds?

    (a)

    Hydrogen bond < Covalent bond < Vanderwaals bond

    (b)

    Vanderwaals bond < Hydrogen bond < Covalent bond

    (c)

    Vanderwaals bond> Hydrogen bond> Covalent bond

    (d)

    Covalent bond < Hydrogen bond < Vanderwaals bond

  13. Consider the following statements.
    (i) In ice, each oxygen atom is surrounded by hydrogen atoms tetrahedrally to four water molecules.
    (ii) Acetic acid exists as dimer due to intra molecular hydrogen bonding.
    (iii) Strong hydrogen bonds lead to an increase in the melting and boiling points.
    Which of the above statements is/are not correct?

    (a)

    (ii) only

    (b)

    (i) and (iii)

    (c)

    (i), (ii) and (iii)

    (d)

    (i) only

  14. Which of the following is named as perhydrol and used as an antiseptic?

    (a)

    D2O

    (b)

    H2O2

    (c)

    NaH

    (d)

    B2H6

  15. Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is most important in this respect?

    (a)

    Its tendency to lose an electron to form a cation

    (b)

    Its tendency to gain an electron to attain stable electronic configuration.

    (c)

    Its low negative electron gain enthalpy value

    (d)

    Its small size

  16. Which metal does not liberate H2 gas from dilute aqueous hydrochloric acid at 298 K?

    (a)

    Mg

    (b)

    Zn

    (c)

    Al

    (d)

    Cu

  17. The most abundant element in the universe is ------

    (a)

    Carbon

    (b)

    Nitrogen

    (c)

    Silicon

    (d)

    Hydrogen

  18. Statement-I: Hydrogen is placed at the top of the group which is in-line with the latest periodic table.
    Statement-II: Hydrogen has a tendency to lose its electron to form H+, thus showing electropositive character like alkali metals. On the other hand, hydrogen has a tendency to gain an electron to yield H-, thus showing electronegative character like halogens.

    (a)

    Statements-I and II are correct and Statement-Il is the correct explanation of statement-I.

    (b)

    Statements-land II are correct but Statement-II is not the correct explanation of statement- I.

    (c)

    Statement-I is correct but Statement-II is wrong.

    (d)

    Statement-I is wrong but Statement-II is correct.

  19. Statement-I: Heavy water has been widely used as moderator in nuclear reactors.
    Statement-II: Heavy water can lower the energies of fast moving neutrons.

    (a)

    Statements-I and II are correct and Statement-II is the correct explanation of statement-I.

    (b)

    Statements-land II are correct but Statement-II is not the correct explanation of statement-I.

    (c)

    Statement-I is correct but Statement-II is wrong.

    (d)

    Statement-I is wrong but Statement-II is correct.

  20. Statement-I: Hydrogen can be used as a clean burning fuel.
    Statement-II: Hydrogen on combustion give only water as end product and it is free from pollutants.

    (a)

    Statements-I and II are correct and Statement-II is the correct explanation of statement-I.

    (b)

    Statements-land II are correct but Statement-II is not the correct explanation of statement-I.

    (c)

    Statement-I is correct but Statement-II is wrong.

    (d)

    Statement-l is wrong but Statement-II is correct.

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