IJSO Question (Witout Ans.)

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    IJSO QUESTION WITHOUT ANSWER (29-10-10)

    1. ABCD is a rectangle and lines DX, DY and XY are drawn as shown. Area of AXD is 5, Area of BXY is

    4 and area of CYD is 3. If the area of DXY can be expressed as p where p N then p is equal to

    AX

    B

    Y

    CD

    (A) 72 (B) 75 (C) 84 (D) 96

    2. A small object of mass m slides down a rough uneven hilly plane from a height h and stops after travellinga certain distance BC on a horizontal surface. The work needed to be done to return the object to its initialposition along the same path would be :

    (A) Zero

    (B) mgh

    (C) 2 mgh

    (D) Cannot be ascertained

    3. The ratio of sigma and pi bonds in benzene is-

    (A) 4:1 (B) 2:1 (C) 1:1 (D) 2:2

    4. If all bacteria of intestine die, then what will be the effect on body:

    (A) Man will feel tired all the body

    (B) It will cause blindness

    (C) There will be no synthesis of vitamin -B Complex

    (D) Excretion will be effected