Which of the following is an emulsifier?

When bauxite powder is mixed with coke and heated with nitrogen at $2075 \ K$,carbon monoxide and $X$ are formed. Which of the following gases is produced when $X$ reacts with water?

Let $u = i + j$,$v = i - j$ and $w = i + 2j + 3k$. If $n$ is a unit vector such that $u \cdot n = 0$ and $v \cdot n = 0$,then $|w \cdot n|$ is equal to

$A$ sound absorber attenuates the sound level by $20\, dB$. The intensity decreases by a factor of:

Which of the following inhibits the enzyme acetylcholinesterase?

Nylon $2-$ Nylon $6$ is