A light year is a unit of ?

The rear view mirror of a motor vehicle is ________?

Lactometer is used for:-

The first global environmental protection treaty " The Montreal protocol' was signed on Sep.26___________:-

Which International organization organized the Earth Summit:-

Prolonged liberal irrigation of agricultural field is likely to create the problems of:-

Which one is a micronutrient of plants:-

Reasons for ozone holes is:-

Short-sightedness can be corrected by using ___________?

In general, wind speed of 105–137 caused_______?

World Earth day is observed on;-

The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?

Which of the following vitamins promote healthy functioning of eyes in human beings?

Zoos are examples for:-

Each day human body breathe in ____________ liters of air:-

746 watts are equivalent to:-

The biggest species of the cat family is___________?

It is easy to swim in a sea than a river because density of sweater is more than that of river:-

Which industry produces the waste of animal protein:-

The most splendid and the most magnificent constellation on the sky is?

In general, Comets have __________ orbits

The branch of study dealing with old age and aging is called:-

The deepest place on earth is ____________?

The most densest substance on the Earth is ______

How many molecules  of ozone can be decomposed by one atom of chlorine:-