MEDIUM
Earn 100

Which international agreement aims to reduce greenhouse gas emissions?
(a)Paris Agreement
(b)Kyoto Protocol
(c)Montreal Protocol
(d)Geneva Convention

50% studentsanswered this correctly
Important Questions on Chemical Bonding and Molecular Structure
EASY
A particle of mass moves along a circle of radius with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to by the end of the second revolution after the beginning of the motion?

MEDIUM
The moment of inertia of a ring about an axis passing through the centre and perpendicular to its plane is . It is rotating with angular velocity Another identical ring is gently placed on it so that their centres coincide. If both the rings are rotating about the same axis then loss in kinetic energy is

EASY
Two particles are moving on two concentric circles of radii and with equal angular speed At their positions and direction of motion are shown in the figure:
The relative velocity at is given by:

EASY
A disc of radius and mass rolls on a horizontal floor. Its centre of mass has speed of How much work is needed to stop it?

EASY
Which compound has both covalent as well as co-ordinate bonds?

EASY
If the kinetic energy of a particle of mass performing uniform circular motion in a circle of radius is find the acceleration of the particle.

EASY
Two spherical black bodies have radii and . Their surface temperatures are and . If they radiate same power then is

EASY
Unit of photosynthesis is

MEDIUM
Where in the chloroplast does this process occur?

MEDIUM
Draw a well-labeled diagram showing the ultra-structure of the chloroplast.

MEDIUM
Draw well-labelled diagram of ultrastructure of chloroplast.

EASY
Draw a labelled diagram of chloroplast.

EASY
Choose correct option
A cell that lacks chloroplast does not

MEDIUM
Give a brief description of the structure of chloroplast.

EASY
Photosynthetic pigments in chloroplast are embedded in membrane of

EASY
Oxygenic photosynthesis occurs in:

HARD
Refer to the given diagrammatic representation of an electron micrograph of a section of chloroplast and answer the question.

Select the option which correctly depicts the functions of parts and .

EASY
Examine the figure
Can these be passed on to the progeny? How?

MEDIUM
Examine the figure
Name the metabolic processes taking place in the places marked 1 and 2.

EASY
During high light intensity, the chloroplasts align themselves

