Five Year Papers

1.         The property of a crystal, which is different in different directions, is called __________.

2.         0.00051 contains __________ significant figures.

3.         The oxidation number of oxygen in OF₂ is __________.

4.         The volume of 1 gm of hydrogen gas at S.T.P is __________.

5.         The oxidation number Mn in KMnO₄ is __________.

6.         The product of ionic concentration in a saturated solution is called __________.

7.         16 gm of oxygen at S.T.P occupies a volume of __________ dm³.

8.         The shape of the orbital for which l = 0 is __________.

9.         The radius of Cl^-1 is __________ than the radius of Cl⁰.

10.     Sp² hybridization is also known as __________.

11.     The value of 1 Debye is __________.

12.     The reactions catalyzed by sunlight are called __________.

13.     The blue colour of CuSO₄ is due to the presence of __________.

14.     The force of attraction between the liquid molecules and the surface of container is called __________.

15.     The heat of neutralization of a strong acid and a strong base is __________.

16.     C º C triple bond is __________. C = C double bond length.

17.     The ions having the same electronic configuration are called iso electronic.

18.     On heating, if a solid changes directly into vapours without changing into the liquid state, the phenomenon is called __________.

19.     Each orbital in an atom can be completely described by __________.

20.     In a molecule of alkene, __________ restricts the rotation of the group of atoms at either end of the molecule.

21.     Density, refractive index and vapour pressure are __________ properties.

22.     The addition of HCl to H₂ solution __________ the ionization of H₂S.

23.     The reaction of cation or anion (or both) with water so as to change its __________ is known as Hydrolysis.

24.     A reaction with higher activation energy will start at __________ temperature.

25.     6.02 x 10²³ has __________ significant figures.

26.     The internal resistance in the flow of liquid is called __________.

27.     A catalyst increases the velocity of a reaction but decreases the __________.

Chapter 1

Introduction to Fundamental Concepts

1.      1 mole of a gas at S.T.P occupies a volume of __________.

2.      A gas occupying a volume of 22.4 dm3 at S.T.P contains __________ molecules.

3.      A formula, which gives the relative number of atoms in the molecule of a compound, is called __________.

4.      A formula which gives the actual number of all kinds of atoms present in the molecule of  compound is termed as __________.

5.      The chemical formula that not only gives the actual number of atoms but also shows the arrangement of different atoms present in the molecule is called __________.

6.      Atomic weight or molecular weight expressed in grams is known as __________.

7.      2 moles of H₂O contain __________ grams and __________ number of molecules.

8.      Any thing that occupies space and has __________ is called matter.

9.      Volume of one __________ mole of a gas at S.T.P is 22.4 cubic feet.

10.  A ton mole of iron is equal to __________ tons.

11.  The force with which the earth attracts a body is called the __________ of the body.

12.  A pure substance contains __________ kind of molecules.

13.  The smallest indivisible particle of matter is called __________.

14.  The atomic number is equal to the number of __________ in nucleus.

15.  The atomic mass is the total number of protons and __________ in an atom of the element.

16.  The average weight of atoms of an element as compared to the weight of one atom of __________ is called the atomic mass.

17.  1.0007 contains __________ significant figures.

18.  The figure 24.75 will be rounded off to __________.

19.  __________ means that the readings and measurements obtained in different experiments are very close to each other.

20.  __________ means that the results obtained in different experiments are very close to the accepted values.

21.  The degree of a measured quantity __________ with increasing number of significant figures in it.

22.  The atomic mass of sodium is __________.

23.  The symbolic representation of a molecule of a compound is called __________.

24.  Molecular formula of CHCl₃ and its Empirical formula is __________.

25.  Molecular formula of benzene is C₆H₆ and its empirical formula is __________.

26.  58.5 is the __________ of NaCl.

27.  4.5 gms of nitrogen will have __________ molecules.

28.  28 gms of nitrogen will have __________ molecules.

29.  2 moles of SO₂ is equal to __________ gms.

30.  1000 gms of H₂O is equal to __________ moles.

31.  The reactions, which proceed in both directions, are called __________.

32.  The reactions, which proceed in forward directions only, are called __________ reactions.

33.  The __________ reactions are completed after some time.

34.  0.0006 has __________ significant figures

35.  7.40 x 10⁸ has __________ significant figures.

36.  7 x 10⁸ has __________ significant figures.

37.  Usually Molecular formula is simple multiple of the __________.

38.  0.1 mole of H₂O contains __________ molecules of H₂O.

39.  Mass of 3.01 x 10²² molecules of CO₂ is __________.

40.  __________ is the branch of science which deals with the properties, composition and structure of matter.

41.  None zero digits are all __________.

42.  The integer part of logarithm is called __________.

43.  The decimal fraction of logarithm is called __________.

44.  __________ is the amount of substance, which contains as many number of particles as there are in 12 gms of Carbon.

45.  6.02 x 10²³ is called the __________.

46.  The accuracy of measurement depends on the number of __________.

47.  __________ is the branch of chemistry that deals with quantitative relationships among the substances undergoing chemical changes.

48.  The sum of atomic weights of all the elements present in molecular formula is called the __________.

49.  __________ is the sum of atomic weights of the elements represented by the Empirical formula of the compound.

50.  Very small and very large quantities are expressed in terms of __________.

51.  In rounding off __________ figure is dropped.

52.  Mole is the quantity, which has __________ particle of the substance.

53.  For three significant figures, 25.55 is rounded off to __________.

54.  The S.I unit of a mass is __________.

55.  Mass of 6.02 x 10²³ molecules of NaCl is __________ gm.

56.  1 mole of NaOH is __________ gm of NaOH.

57.  Formula weight is used for __________ substances.

58.  The word S.I stands for __________.

59.  4.5 gms of water will have __________ molecules.

60.  0.0087 has __________ significant figure.

Chapter 2

The Three States of Matter

1.         The intermixing of gases or liquids in a container irrespective of their densities, is called __________.

2.         At constant temperature, if the pressure of a given mass of a gas is decreased, its volume will __________.

3.         A volume of __________ dm³ will hold 128 gms of SO₂.

4.         At constant temperature of a given mass of a gas, the product of its __________ and __________ is constant.

5.         The rates of diffusion of gases are __________ proportional to the square root of their densities.

6.         Gases deviate from ideal behaviour more markedly at high __________.

7.         Liquid diffuse __________ than gases.

8.         An imaginary line passing through the centre of a crystal is called __________.

9.         The temperature at which more than one crystalline forms of a substance coexist in equilibrium is called __________.

10.     Two or more substances crystallizing in the same form is called __________.

11.     The existence of solid substances in more than one crystalline form is known as __________.

12.     Rate of diffusion of gases is __________ as compared to liquids.

13.     Boiling point of a liquid __________ with the pressure.

14.     Mercury in a glass tube forms __________ curvature.

15.     Gases can be compressed to __________ extent.

16.     Viscosity of a liquid __________ with the increase of temperature.

17.     Surface tension of water __________ by adding soap solution into it.

18.     The internal resistance to the flow of a liquid is called __________.

19.     The rise or the fall of a liquid in a capillary tube is called __________.

20.     Matter exists in __________ states.

21.     The freezing point of water in Fahrenheit scale is __________.

22.     Boiling point of water is __________ °K.

23.     SI unit for measurement of pressure is __________.

24.     The value of gas law constant R = __________ dm³ atm/°K/mole.

25.     The absolute Zero is equal to __________.

26.     If P is plotted against 1/V at constant temperature a __________ is obtained.

27.     Gases __________ in heating.

28.