Questions

The stability of the ions is determined by the energy of the lone pairs. Carbon has the least effective nuclear charge (Zeff) and so the lone pair on the CH3− ion has the highest energy, making it the least stable ion and so the strongest base. The Zeff increases as we move across the period until we get to fluorine which has the greatest Zeff and so its lone pairs have the lowest energy, making F− the least basic ion.

In order of decreasing basicity they are ranked LiCH3 > LiNH2 > LiOH > LiF. We are dealing with the ions F−, OH−, NH2− and CH3− and so the factor which influences their basicity is the stability of the ion compared to its conjugate acid.

The functions performed by trade unions can be classified into two groups: 

i.) Militant Functions

ii.) Fraternal Functions

Militant functions :

These activities include strike, lock outs, gherao etc which means putting up a fight with the management. Hence, they are called militant functions. They are carried out for following purposes: 

a.) Rise in wages

b.) Rise in the status of workers

c.) Protection against injustice

Fraternal functions :

These functions are carried out by the trade unions for the welfare of their employees which includes: 

a.) Measures to boost up the workers’ morale

b.) Foster self confidence

c.) Develop sincerity and discipline

d.) Protection to women workers against discrimination

Except pineapple remaining all three are types of apples.

Pineapple is what kind of apple isn't an apple.

The F1, F2 to F12 keys that are found on the top row of most computer keyboards are called as Function Keys. Unless you've witnessed the evolution of computers from their early days, you probably don't know why they were invented and for what.
Function keys were used by various computer programs to fulfill various functions.

F12 - It is used by many web browsers to open the developer tools.