401. The ‘stone’ formed in human kidney consist mostly of_____________?
A. Calcium oxalate
B. Sodium acetate
C. Magnesium sulphate
D. Calcium

402. Approximately, how many times each day do our heart valves open and close normally?
A. 10,000
B. 1,00,000
C. 1,50,000
D. 2,00,000

403. Quantity of fresh air required for a man is 1000 cubic feet of air for every____________?
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. 20 minutes

404. What kind of weathering takes place on the valley side above the surface of the glacier?
A. Plucking
B. Abrasion
C. Chemical weathering
D. Frost shattering

405. Rainfall related to mountains is:
A. Orographic rainfall
B. Normal rainfall
C. Monsoon rains
D. Cyclonic rainfall

406. What is meant by “Equinox”?
A. The longest day
B. The shortest day
C. The sun-month long day
D. Equal duration of day and night

407. The distance of longitude represents how many minutes difference in time?
A. 10 minutes
B. 4 minutes
C. 15 minutes
D. 1 minute

408. The season changes because of the ____________?
A. Moon is revolving round the earth
B. Earth is revolving round its axis
C. Earth is revolving round the sun
D. Planet Mars is attracting the sun

409. The largest latitude circle on earth is ________?
A. Arctic circle
B. Tropic of cancer
C. Tropic of Capricorn
D. The Equator

410. The oldest barrage on the river Indus at Sukkur was built in_____?
A. 1932
B. 1940
C. 1930
D. 1928

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