Free MCQs & Online Quiz Practice for Exams

Q: ³⁹Ar is an isotope with a half-life of 269 yr. It will reduce to half in?

A) 134.5 min

B) 134.5 years

C) 269 min

D) 269 years

Q: A sample starts with 1000 radioactive atoms. How many half-lives have elapsed when 750 atoms have decayed?

A) 0.25

B) 1.5

C) 2

D) 2.5

Q: Origin of energy from the sun and stars is?

A) Fission

B) Fusion

C) Carbon dating

D) Radioactivity

Q: Plutonium-242 has how many neutrons?

A) 92

B) 148

C) 150

D) 242

Q: Decay producing new element?

A) Alpha

B) Beta

C) Gamma

D) Alpha and Beta

Q: Decay producing greatest mass loss?

A) Alpha

B) Beta

C) Gamma

D) Alpha

Q: The tone of the poem they have cut down the pines is

A) sorrowful

B) cheerful

C) wrathful

D) aggressive

Q: When its silver blind is down in this line the phrase 'silver blind' is used as

A) metaphor

B) alliteration

C) simile

D) rhyme

Q: The poem "They Have Cut Down the Pines" mainly expresses the poet's love for

A) nature

B) humanity

C) education

D) patriotism

Q: In the poem the cutting down of the pines symbolizes

A) destruction of nature

B) destruction of cities

C) destruction of war

D) DESTRUCTION OF CULTURE

Q: The poet?s attitude towards the pines can be described as

A) protective

B) indifferent

C) mocking

D) fearful

Q: The poem emphasizes that even after destruction life and beauty will

A) vanish forever

B) flourish again

C) remain the same

D) WEAKEN SLOWLY

Q: The correct order of the structures involved in the flow of air in the human body is

A) Pharynx→Trachea→Larynx→Bronchi→Bronchioles

B) Larynx→Pharynx→Trachea→Bronchi→Bronchioles

C) Trachea→Pharynx→Larynx→Bronchi→Bronchioles

D) Pharynx→Larynx→Trachea→Bronchi→Bronchioles

Q: Food is prevented from entering into the Larynx by

A) Glottis

B) Epiglottis

C) Vocal cords

D) Internal nostrils

Q: Oxygen from the lungs enters into the blood due to

A) Diffusion

B) Higher affinity of CO₂ for air

C) Less affinity of O₂ for air

D) Osmosis

Q: Which part of the air passageway is also called the windpipe?

A) Bronchus

B) Alveolus

C) Larynx

D) Trachea

Q: In which disease are the walls of the alveoli broken?

A) Pneumonia

B) Bronchitis

C) Emphysema

D) Asthma

Q: The diaphragm is flat and the ribs move out; this occurs during

A) Expiration

B) Inspiration

C) Lungs expansion

D) Breathing

Q: The chest cavity is separated from the abdominal cavity by a muscle called

A) Larynx

B) Trachea

C) Bronchus

D) Diaphragm

Q: Respiration at cellular level is known as

A) Breathing

B) Ventilation

C) Oxidation

D) Inhalation