Oil rises up to wick in a lamp because_____________?

A. Oil is very light
B. Oil is volatile
C. Diffusion of oil through the wick
D. Capillary action phenomenon

Submitted by: Hafeez Alam Saila

Capillary action (sometimes capillarity, capillary motion, capillary effect, or wicking) is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity

Related Mcqs:

In an oil lamp, the oil rises up in the wick due to?
A. Capillary action
B. Atmospheric pressure
C. Viscosity of oil
D. Change in temperature

Submitted by: Ashfaque Ali Khoso
Oil rises in a wick of oil lamp on account of a property of matter is called?
A. Angle of projection
B. Determines
C. Capillary action
D. Refraction of light

Submitted by: Mansoor Ahmed Suhag
A glass chimney stops an oil lamp from smoking because:
A. It increases the supply of oxygen to the flame by convection
B. The heat produced ensures complete
C. Both to these
D. Neither of these

Submitted by: hamza
A cyclist cycling around a circular racing track skids because_____________?
A. the centripetal force upon him is less than limiting friction
B. the centripetal force upon him is greater than limiting friction
C. the centripetal force upon him is equal to the limiting friction
D. the friction between the tyres of the cycle and road vanishes
X-rays are diffracted by a crystal but not by a diffraction grating because_____________?
A. The ions in a crystal are well arranged
B. The lines in a diffraction grating cannot reflect X-rays.
C. The penetration power of X-rays is high in a diffraction grating
D. The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal
As the temperature of ice rises, the ice melts and its density?
A. Decreases
B. Remain constant
C. Increases
D. Increases upto 10C

Submitted by: Ashfaque Ali Khoso
When oil and gas resources are burnt they kill many forests and lakes by ________________ ?
A. deforestation
B. water pollution
C. acid rain
D. forest fire

Submitted by: Mansoor Ul Haque
Oil of vitriol is_________?
A. Nitric acid
B. Hydrochloric acid
C. Phosphoric acid
D. Sulfuric acid

Submitted by: ABDUL HAYEE
Crude Oil is heated in the furnace up to _________?
A. 300°C
B. 350°C
C. 400°C
D. 450°C

Submitted by: Warraich
What is the chemical name of Oil of Vitriol?
A. Hydrochloric Acid
B. Sulphuric Acid
C. Nitric Acid
D. Muriatic Acid

Submitted by: Shaan Ahmed