CAT Questions

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A mineral is a naturally occurring, inorganic solid, with a definite chemical composition. They cannot be in liquid or gas state. They exists only in solid state.

All shoes have a sole of some sort.Not all shoes are made of leather (choice b); nor do they all have laces (choice c).Walking (choice d) is not essential to a shoe.

Tetraethyl lead is a highly toxic compound used as a gasoline additive.

Tetraethyl lead abbreviated as TEL, is an organo lead compound with the formula (CH₃CH₂)₄Pb. It is a petro-fuel additive which in turn caused increased vehicle performance. This is also used as an antiknock agent in gasoline and jet fuels. Tetraethyl lead is absorbed rapidly by the skin, the lungs, and the gastrointestinal tract. It is converted to triethyl lead, which might be responsible for its toxicity.

A river which can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps.

Solely means only, simply or merely.

$$\begin{gathered} Given x × y = x + y + xy \\ Here x = 6 , y = 24 \\ Then, \\ x × y = 6 + 24 + 6x24 \\ 6 x 24 = 30 + 144 \\ = 30 + 12 \\ = 42. \end{gathered}$$