Question : Oil raises the wick in a lamp because

Option 1: Oil is very light.

Option 2: Of the diffusion of oil through wick

Option 3: Of the surface tension phenomenon

Option 4: Of the capillary action phenomenon

Question : If $a^{3}+\frac{1}{a^{3}}=2$, then the value of $\frac{a^{2}+1}{a}$ is ($a$ is a positive number):

Option 1: 1

Option 2: 2

Option 3: 3

Option 4: 4

Question : Select the most appropriate option to improve the underlined segment in the given sentence. If there is no need to improve it, select 'No improvement'.

A hole is in my pocket.

Option 1: A hole are there

Option 2: A hole there is

Option 3: There is a hole

Option 4: No improvement

Question : Virtually treeless, sparse vegetation is found in:

Option 1: Taiga

Option 2: Alpine

Option 3: Tundra

Option 4: Chapparal

Question : If $(a+\frac{1}{a})^2=3$, the value of $(a^3+\frac{1}{a^3})$ is:

Option 1: $0$

Option 2: $3(a+\frac{1}{a})$

Option 3: $3(a^2+\frac{1}{a^2})$

Option 4: $1$