Question

Assertion - Electron gain enthalpy becomes less negative as we go down a group. Reason - Size of the atom increases ongoing down the group and the added electron would be farther from the nucleus.​

Answer 1

Answer:

1. Find the height of the building shown in the

figure.

2. A child is watching a bird on a tree.The angle

of elevation of his/her sight is 450

. The child is

1.5 m tall.Find the height of the tree when the

distance between the foot of the tree and child

on the ground is 30m.

3. The angle of depression of a car, parked on

the ground, from the top of a 75 m high tower ,

is 300

.Find the distance of the car from the base

of the tower