Oswaal MCQ Class 12. We covered all the Oswaal MCQ Class 12 in this post for free so that you can practice well for the exam.
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Oswaal Objective MCQ Class 12 for Students
The size of the Respirable Suspended Particulate Matter (R.S.P.M.) in the air is
A) more than 7μm (micron)
B) more than 6μm (micron)
C) more than 5μm (micron)
D) less than 5μm (micron)
Option d – less than 5μm (micron)
Four wires of the same material and dimensions as mentioned below are stretched by a load of the same magnitude separately. Which one of them will be elongated maximum?
A) Wire of 1 m length and 2 mm diameter
B) Wire of 2 m length and 2 mm diameter
C) Wire of 3 m length and 1.5 mm diameter
D) Wire of 1 m length and 1 mm diameter
Option c – Wire of 3 m length and 1.5 mm diameter
For which one of the following, capillarity is not the only reason?
A) Blotting of ink
B) Rising of underground water
C) Spread water drop on a cotton cloth
D) Rising of water from the roots of a plant to its foliage
Option d – Rising of water from the roots of a plant to its foliage
Kerosene oil floats on water because
A) Its density is greater than the density of water
B) Its density is less than the density of water
C) Its density is equal to that of the density of water
D) None of the above
Option b – Its density is less than the density of water
The pressure inside a soap bubble is
A) More than atmospheric pressure
B) Less than atmospheric pressure
C) Equal to atmospheric pressure
D) Half of the atmospheric pressure
Option a – More than atmospheric pressure
If two bubbles of soap of different diameters come in contact with a tube, then what will happen?
A) The size of both bubbles will remain the same
B) The smaller bubble will become smaller, and the bigger one will become bigger
C) The smaller bubble will become larger, and the larger one will become smaller to get the same size
D) Both bubbles will burst as soon as they come in contact
Option b – The smaller bubble will become smaller, and the bigger one will become bigger
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