Which of the following reactions can produce aniline as the main product?

Using the Trapezoidal rule,find the approximate value of $\int_1^4 y \, dx$ based on the following table:

$x$	$1$	$2$	$3$	$4$
$y$	$0.7111$	$0.7222$	$0.7333$	$0.7444$

(in $.1833$)

Which of the following is a cationic detergent?

The function of leghaemoglobin in the root nodules of legumes is

$A$ father with $8$ children takes them $3$ at a time to the Zoological gardens,as often as he can without taking the same $3$ children together more than once. The number of times he will go to the garden is

The set $\{x \in R : [x - |x|] = 5\}$ is equal to