MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
A. Psychological
Explanation
It involves the compulsive biting of one’s skin, often around the fingers, and is considered a body-focused repetitive behavior associated with anxiety or obsessive-compulsive disorder (OCD).
Correct answer
C. Refraction of rays of sun passing through the atmosphere
Explanation
Refraction of rays of sun passing through the atmosphere is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. A pair of forces acting along the same line and in opposite direction
Explanation
A pair of forces acting along the same line and in opposite direction is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. acid rain
Explanation
acid rain is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Piezo-electric effect
Explanation
Piezo-electric effect is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Oxygen
Explanation
Oxygen is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Vitamin E
Explanation
Vitamin E is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Steam contains more energy than boiling water
Explanation
Steam contains more energy than boiling water is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Neon
Explanation
Neon is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Retinene
Explanation
Retinene is better known as retinaldehyde or simply retinal and is fundamental in the transduction of light into visual signals in the photoreceptor level of the retina (known as the visual cycle). Retinene is more formally known as dehydroretinaldehyde.