IJSO (Indian Junior Science Olympiad) Mock Paper – Mathematics, Physics, Chemistry and Biology Part 6

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53. Pressure of real gas is less than the pressure of ideal gas because:

A. No. of collisions increases

B. Definite shape of molecule

C. K. E. of molecule increases

D. Inter molecular forces

54. The following graph illustrates:

Graph Illustrates

A. Dalton՚s Law

B. Charles Law

C. Boyles Law

D. Gay Loussac Law

55. For real gases Vander Waal՚s equation is written as

Where ‘a’ and ‘b’ are Vander Waal՚s constants.

Two sets of gases are: (I) and He (II) and

The gases given in set-I in increasing order of ‘b’ and gases given in set-Il in decreasing order of ‘a’ , are arranged below. Select the correct order from the following:

A.

B.

C.

D.

56. Which has the maximum number of molecules among the following?

A.

B.

C.

D.

57. One pail of an element A combines with two pails of another element B. Six parts of the element C combines with four pails of the element B. If A and C combine together the ratio of their weights well be governed by:

A. Law of definite proportion

B. Law of multiple proportions

C. Law of reciprocal proportion

D. Law of conservation of mass

58. Number of oxygen atoms in 8 gins of ozone is:

A.

B.

C.

D.

59. The volume of a gas at and 700 mm pressure is 760 cc. The no. of molecules present in this volume is:

A.

B.

C.

D.

60. The ratio of most probable velocity , average velocity , root mean square velocity (u) is:

A.

B.

C.

D.

Biology

61. The heart keeps on beating throughout the life without fatigue because:

A. It contracts slowly

B. It has a resting or recovery period

C. It can use lactic acid as an extra source of energy

D. None of the above

62. In circulatory system, valves occur in:

A. Heart and blood vessels of vertebrates and invertebrates as well as vertebrate lymphatic՚s

B. Both vertebrate and invertebrate hearts

C. Vertebrate heart only

D. Both vertebrate and invertebrate hearts and their blood vessels

63. Arrange the following in the order of increasing volume:

I. Tidal volume

II. Residual volume

III. Inspiratory reserve volume

IV. Vital capacity

A. I < II < III < IV

B. I < III < II < IV

C. I < IV < III < II

D. I < IV < II < III

Developed by: