General chemistry Questions - Defence MCQ

An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system

Fe (III) chloride and hydrogen gas formed when iron filings are heated with dilute hydrochloric acid

Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light.

Electrical resistivity of a given metallic wire depends upon nature of the material.

A variable resistor is a resistor of which the electric resistance value can be adjusted.When a variable resistor is used as a potential divider by using 3 terminals it is called a potentiometer. When only two terminals are used, it functions as a variable resistance and is called a rheostat.

Basics questions be confident!

The biosphere is a global ecosystem composed of living organisms (biota) and the abiotic (nonliving) factors from which they derive energy and nutrients.

Biodiversity is a term used to describe the enormous variety of life on Earth. It can be used more specifically to refer to all of the species in one region or ecosystem. Biodiversity refers to every living thing, including plants, bacteria, animals, and humans

LPG, which is heavier than air due to its high density, is a hydrocarbon-based combustible gas. LPG is the generic name of the butane and propane gases and their mixtures in different proportions.

a black viscous mixture of hydrocarbons obtained naturally or as a residue from petroleum distillation. It is used for road surfacing and roofing.