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1. Name the gas which is used by white blood cells to kill the invading bacteria.(a) Oxygen (b) Carbon dioxide (c) Nitrogen (d) Chlorine2. What is the ercentage o! oxygen in the inhaled air"(a) 21# (b) 1$.%# (c) 1 (d) 2'#. What is the ercentage o! CO2 in the exhaled air"

(a) 2# (b) %.%# (c) $# (d) '.'%#%. Normal range o! breathing rate er minute in an adult erson at rest is(a) * 12+ (b) 1, * 1&+ (c) 21 * 2%+ (d) ' * ,. -uscle crams occurs due to accumulation o! (a) actic acid (b) /cetic acid (c) /lcohol (d) -aliceacid$. 0uring exhalation the ribs(a) move down and inwards (b) move uwardsc) move outwards (d) do not move at all. n cockroach+ air enters the body through(a) ungs (b) 3ills (c) 4iracles (d) 4kin&. 5he air tubes in insects are called

(a) 6ronchus (b) 5racheae (c) Nostrils (d)blowholes. Name the muscular sheet which searates the abdomen !rom the chest cavity.(a) 0iahram (b) 7ibs (c) 4iracles (d) 5racheae1'. 6irds breathe through(a) ungs (b) 8idney (c) 4iracles (d) 4kin11. Which o! the !ollowing organism can do anaerobic resiration"(a) 9east (b) eech (c) /moeba+ (d) :ish12. 5he !ood material used to release energy in body cells+ which is consideredas a biological !uel is(a) 3lucose (b) ;itamin (c) Water (d) -inerals1. 4nake breathe through(a) ungs (b) 4iracles (c) 5racheae (d) 4kin1%. 0uring anaerobic resiration the end roduct other than CO2and energy is(a) O2  (b) /lcohol (c) Nitrogen (d) Water1,. Name the chemical used to test the resence o! CO2 in exhaled air.(a) ime >>>>>>>>>>>>> is termed as

breathing rate(a) 4econd (b) -inute (c) ?our (d) 0ay1. Chest cavity is surrounded by(a) 12 air o! ribs (b) 1' air o! ribs (c) 11 air o! ribs (d) 2, ribs.2'. Wind ie is called(a) Oesohagus (b) 5racheae (c) 6ronchus (d) Nasal Cavity21. Our >>>>>>> cells can resire anaerobically.(a) nerv (b) muscle (c) germ (d) blood.22. 7esiration releases energy !rom the >>>>>>>>>>.(a) air (b) water (c)!ood (d) sunlight.

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Physics

=1@ 7ectilinear roagation o! light means+...

(a) ight can bend like curves.

(b) ight travels in straight line.(c) ight bounces back by a medium when it !alls on the medium.

(d) ight gives us sense o! vision.

=2@ 4hadows !ormation shows that light

(a) can travel in vacuum (b) travels in straight lines

(c) exhibits wave nature. (d) carries energy.

=@ mages that cannot be catured on a screen are called >>>>>>>>>.

(a) virtual images (b) real images

(c) inverted images (d) reAected images

=%@ Which one o! the !ollowing does NO5 use concave mirror"

(a) magniBer mirror by dentist (b) reAector in Aashlight(c) solar heater (d) rear view mirror in cars

=,@ Which o! the !ollowing is NO5 the other name o! convex mirror"

(a) diverging mirror (b) Bsh eye mirror

(c) converging mirror (d) all o! these

=$@ Which lens always gives an image which is uright+ virtual and smaller than

the ob

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&@ (a) '

@ (c) lane mirror

1'@ (b) 7ed+ 3reen+ 6lue