Fluid statics or hydrostatics is the branch of fluid mechanics that studies “fluid at rest and the pressure in a fluid or exerted by a fluid on an immersed body”. It encompasses the study of the condition under which fluids are at rest in stable equilibrium as opposed to fluid dynamics, the study of fluids in motion.
Hence, the correct answer is B

Any energy transfer that does not involve temperature difference in some way is not to heat.

Any energy transfer will not always require a temperature difference.

On heating, the length and volume will change not remaining the same.

Whenever there is a temperature difference heat is not the only way of energy transfer.Hence, the correct answer is A

An object has constant velocity means that it is moving along a straight line, and as every second of time goes by, the object travels through the same number of meters.Hence, the correct answer is B

A cricket ball has maximum inertia.

The inertia of an object is proportional to its mass so higher the mass of object higher the inertia of the object.Hence, the correct answer is D

kWh and joules are the two energy units.

1 watt is defined as 1joule/second. So if you multiply it by time, you get watt-seconds which is equal to a joule.

So, 1kWh=3600kWs=3600000Ws=3600000J

So, 1kWh=3.6x10⁶J. Hence, the correct answer is B

The chemical formula of washing soda is Na₂CO₃.10H₂O, and its chemical name is Sodium Carbonate. It is also known as soda ash or soda crystals. Hence, the correct answer is B

Bleaching powder is not used as a reduction agent in chemical industries. Reducing agent is a substance that tends to bring about reduction by being oxidized and losing electrons.Hence, the correct answer is A

Latent heat is the energy absorbed or released by a substance during the change in its physical state (phase) that occurs without changing its temperature. It is fixed at a given temperature. It depends on the temperature but independent of volume.Hence, the correct answer is D

Grouping of an organism according to similarities and difference is termed classification. When an organism is classified into various categories, a hierarchy is maintained.

Accordingly, an organism belongs to Kingdom, Phylum, Class, Order, Family, Genus and Species in hierarchical order.Hence, the correct answer is A

The term food chain refers to the sequence of events in an ecosystem, where one organism eats another and then is eaten by another organism. It starts with the primary source like the sun or hydrothermal vents where producers make food, continues with consumers or animals who eat the food, and ends with the top predator.

Example: Grass (Primary Producer) - Goat (Primary Consumer) – Human (Secondary Consumer)
Hence, the correct answer is B