Explanation

The charges of Proton, Electron, Neutron respectively are:

• Proton: Positive charge (+1)
• Electron: Negative charge (-1)
• Neutron: Neutral charge (0)

Explanation

At 170°C, ethanol undergoes acid-catalyzed dehydration to form ethene (C₂H₄).

Concentrated H₂SO₄ acts as a dehydrating agent, removing water from ethanol.

Explanation

Maltose is made of two glucose molecules, so both structural units are the same.

Lactose = glucose + galactose (different units).

Sucrose = glucose + fructose (different units).

Explanation

Absorbance (A) is a logarithmic ratio of incident to transmitted light; hence, it is unitless.

In the Beer-Lambert law:

A=ε⋅C⋅L, only ε (molar absorptivity) carries units to balance the equation.

Explanation

Cohesion is the attractive force between molecules of the same substance.

It is strongest in solids due to tightly packed molecules.

Explanation

Secondary syphilis commonly presents with fever, skin rashes (especially on palms and soles), and joint pain.

It occurs weeks after the primary sore and indicates systemic spread of the infection.

Explanation

A virus consists of a protein coat (capsid) that surrounds its genetic material (DNA or RNA).

It lacks cellular structures.

It is not considered a complete cell.

Explanation

Oscillatory systems gradually lose energy due to frictional forces (like air resistance or internal damping).

This damping reduces amplitude over time, preventing indefinite oscillation.

Explanation

Amphibians, such as frogs and toads, have a 3-chambered heart.

- The three chambers are:

    1. Two atria (upper chambers)

    2. One ventricle (lower chamber)

Explanation

Funaria is a moss, and mosses belong to the class Bryopsida.

It is a non-vascular, spore-producing plant typically found in moist, shady places.