10th Biology Chapter 1 Gaseous Exchange

Sr #	Questions	A	B	C	D
1	Number of pairs of ribs in humans is:	12	24	26	None of these
2	Which remains unaffected in expired air?	O2	CO2	N2	Water vapors
3	How many bronchi are found in air passageway?	1	2	Many	None
4	A disease involving breakdown of air sacs of lungs is called:	Pneumonia	Bronchitis	Asthma	Emphysema
5	Which one is form of allergy?	Asthma	Bronchitis	Pneumonia	Lung cancer
6	Lungs are organ which are:	Spongy	Elastic	Spongy and elastic	Tough
7	Cluster of pouches found in respiratory system:	Bronchi	Alveoli	Bronchioles	Trachea
8	Most of the gaseous exchange in leaf occurs through:	Stomata	General surface	Cuticle	Lenticels
9	Main cause of lung cancer is:	Smoking	Viral infection	Bacterial infection	Both 2 & 3
10	Rate of breathing depends on concentration of which gas in blood?	Oxygen	Carbon dioxide	Nitrogen	Hydrogen
11	Percentage of carbon dioxide in exhaled air is:	16%	4%	79%	0.04%
12	How many lobes are present in right lung?	2	3	4	5