EASY
8th CBSE
IMPORTANT
Earn 100

Which microorganism does not have a cellular structure?

Important Questions on Annual Test Paper for Chapters 11-19

MEDIUM
8th CBSE
IMPORTANT

A metal X can replace a metal Y from its salt solution. But Y cannot replace X from its salt solution. Which metal is higher up in the reactivity series? 

EASY
8th CBSE
IMPORTANT
Write one word for 'the variety of plants, animals and microorganisms commonly found in a region.'
EASY
8th CBSE
IMPORTANT
Which friction is smaller-sliding friction or rolling friction?
EASY
8th CBSE
IMPORTANT
To increase the loudness of sound by four times, by how much should the amplitude of vibration be changed?
EASY
8th CBSE
IMPORTANT
Sound above which frequency is called ultrasonic?
EASY
8th CBSE
IMPORTANT
Which of these are sensitive to colour rods or cones?
MEDIUM
8th CBSE
IMPORTANT
How long does light from the Sun take to reach the Earth?
EASY
8th CBSE
IMPORTANT
What is the main advantage of drip irrigation?