411. The element which is the most abundant in the earth’s crust is

A.silicon
B.iron
C.aluminium
D.oxygen *

412. The gas commonly used in balloons is

A.hydrogen *
B.helium
C.oxygen
D.carbon dioxide

413. Compressed Natural Gas (CNG) has the same chemical composition as that of:

A.LPG
B.sui gas *
C.tear gas
D.poison gas

414. An ordinary mobile phone communicates by using

A.sound waves
B.infrared waves
C.radio waves *
D.UV waves

415. Another organ that filter blood besides the heart in a human body is:

A.pancrease
B.spleen
C.liver *
D.kidney

416. Deuterium oxide is the chemical name of:

A.hard water
B.heavy water *
C.soft water
D.mineral water

417. What poisonous gas is contained in the exhaust fumes from cars?

A.ammonia
B.coal gas
C.carbon monoxide *
D.sulphur dioxide

418. Who scored a century before lunch in a test match?

A.asif iqbal
B.zaheer abbas
C.shahid afridi
D.majid khan *

419. With which sport meta dor is associated

A.bull fighting *
B.rowing
C.cycling
D.catching

420. Name the biggest barrage of Pakistan

A.sakhar barrage *
B.tanusa barrage
C.guddu barrage
D.ghulam muhammad barrage

 

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