Questions

Fratricide means the accidental killing of one's own forces in war.

Failures in the direct fire control plan can lead to be a cause of fratricide.

I am black gold i.e charcoal. It is black when it is not used and when using it is red due to fire and when used it is in grey color as it becomes ash. 

These days channel members are being accepted by companies as their partners. The intermediaries are even being asked to integrate their business with the companies which results in lesser costs, greater efficiency and improved customer service. Corporates like Airtel are adopting PRM (Partner relationship management) software to give that added advantage to their supply chain. They organise rewards and recognition programs for their channel partners and also organise proper channels though which partners can vent any of their grievances relating to payments, violation of codes etc.

The temperature at which water boils depends mainly on air pressure.

Light travels fastest in Vacuum. The fastest thing in the whole universe is the speed of light in a vacuum like outer space. It is about 2.99 x 10⁸ m/s. 

Ominous is the correctly spelt word in the given options. It means that giving the worrying impression that something bad is going to happen.