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