Everyday Science — All MCQs

Correct Answer: A

P-waves is a term associated with Earthquakes. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: B

Quality rating of deisel is called: Cetane. The term is defined by the subject, process, or characteristic described in the question.

Correct Answer: D

Quantity of fresh air required for a man is 1000 cubic feet of air for every 20 minutes. This is based on the organism’s established anatomy, behavior, or biological classification.

Correct Answer: D

Quartz crystal in quartz watches work on the principle called: Piezo-electric effect. The term is defined by the subject, process, or characteristic described in the question.

Correct Answer: A

Radiations are harmful as it: Causes skin cancer. The result follows from how light is reflected, refracted, focused, or distributed across the electromagnetic spectrum.

Correct Answer: A

Radioactive isotope of Uranium used in Nuclear Bomb is 92 U 235. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: D

Radioactivity was discovered by Bacquerel. Historical scientific accounts credit this person, place, or event with the development described.

Correct Answer: B

Radon is radio active gas. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: A

Rain drops fall from great height Which among the following statements is true regarding it: they fall with that ultimate velocity, which are different for different droplets. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: C

Rainbow is seen after rain because of hanging molecules of water which act as Mirror. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: A

Rainfall related to mountains is Orographic rainfall. Its geographic position or physical characteristics account for the description given.

Correct Answer: B

Rancidity produced in butter can be decreased by adding quinoline to the butter”. This statements shows that Quinoline is an inhibitor. This statements shows that Quinoline is an inhibitor. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: A

Rate of evaporation of petrol is greater than that of water at room temperature because: petrol molecules do not have any hydrogen bond. The stated result follows from the relevant physical relationship between force, matter, motion, or energy.

Correct Answer: B

RBCs are also called as Erythrocytes. The term is defined by the subject, process, or characteristic described in the question.

Correct Answer: B

Rearing of honey bees for honey production is called: Apiculture. The term is defined by the subject, process, or characteristic described in the question.

Correct Answer: B

Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the Earth. What is the significance of this observation: Gravitational waves’ were detected. Astronomical observations and measurements establish this relationship among the relevant celestial bodies.

Correct Answer: B

Rectified spirit contains alcohol about: 95%. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: B

Red + Green + Blue = White. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: D

Red blood cells are produced in Bone-marrow. This follows from the structure and normal physiological function of the relevant organ, tissue, or body system.

Correct Answer: B

Red blood corpuscles are formed in the Bone marrow. This follows from the structure and normal physiological function of the relevant organ, tissue, or body system.