Roasting of concentrated zinc sulphide ore is completed at the temperature of 1200 K to _______

The final product (C) in the following reactions is:

How many structures of Fis possible?

Reactivity of with the following in the decreasing order is:
i)
ii)
iii)
iv) 

When is treated with MgBr,followed by hydrolysis, the product is:

Consider the following halogen-containing compounds;
I)
II)
III)
IV)
V)

Which of the following mentioned positions in the given compound is more reactive towards electrophilic substitutions?

Two adjacent sides of a parallelogram ABCD are given by and . The side AD is rotated by an acute angle in the plane of parallelogram so that AD becomes AD. If AD makes a right angle with the side AB then the cosine of angle is given by

At A, h>0 and and , then the maximum value of is

The position vector of a point is where and . If , the number of possible position of is

For such questions, we should know different formulas of limit.

For such questions, we should know different formulas of limits. We should try different methods to simplify the function in a way that it doesn't become zero.

For such questions, we should know different formulas of limits.

For such questions, we should know different formulas of limits.