531.combining of two nonmetal atoms by sharing one more pairs of electron is called?

A.ionic bond
B.covalent bond *
C.metal bond
D.none of these

532. Which method may not be considered as a food preservation method?

A.freezing
B.irradiations
C.sleeping *
D.none of these

533. What does RNA stand for?

A.ribonucleic acid *
B.russian national assembly
C.red nitric acid
D.none of these

534. Deficiency of iron in the human diet causes?

A.hepatitis
B.malaria
C.anemia *
D.none of these

535. Which of the following cannot be considered as a renewable source of energy?

A.petroleum *
B.wind
C.solar
D.none of these

536. Which of the following is not a part of quantities used to discuss computer memory?

A.bite *
B.bit
C.byte
D.none of these

536. Which of the following may be said be the most harmful radiation emitted by the sun?

A.infra-red
B.visible light
C.ultra-violet *
D.none of these

537. Which of the following may be considered as a factor having influence on intelligence?

A.hereditary *
B.dressing
C.smilihg
D.none of these

538. Which one is not a part of cell phone structure?

A.LCD
B.battery
C.water *
D.none of these

539. ____ advocate that the students be free to choose how and what they study

A. existentialism *
B. pragmatism
C. realism
D.idealism

540. John deveey said that education is a purely ______ process

A. friendly
B.common
C.Mental
D.social *

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