Chemistry ยท Science General

States of Matter

2,682 Questions

States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.

Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water

States of Matter Questions

Multiple choice

Water dissociates into H+ and OH- ions

  1. to a large degree

  2. to a small degree

  3. no at all
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water is a very weak electrolyte and undergoes self-ionization to a very small extent, producing a tiny concentration of H+ and OH- ions.

Multiple choice

What is the correct CHEMICAL name for H2O

  1. Hydrogen Oxide

  2. Dihydrogen Monoxide

  3. Dihydrogen Oxygide

  4. Water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to IUPAC nomenclature for covalent compounds, H2O is named Dihydrogen Monoxide (two hydrogens, one oxygen). While 'Water' is the common name, the question asks for the chemical name.

Multiple choice

Humans are made up of _______ water.

  1. 95%

  2. 2.5%

  3. 70%

  4. 50%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The human body is composed of approximately 60 to 70 percent water. This water is essential for various physiological processes, including temperature regulation and nutrient transport.

Multiple choice

Concentrations of substances are often expressed as:

  1. parts per thousand

  2. parts per million

  3. parts per billion

  4. "Holy cow, that's a LOT!"
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Concentrations of trace substances, such as pollutants in water or chemicals in soil, are commonly measured in parts per million (ppm) to express very small ratios.

Multiple choice

Complex media contains

  1. few growth factors

  2. blood

  3. unknown components

  4. phenol

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Complex media (or undefined media) contain ingredients like yeast extract, peptone, or beef extract where the exact chemical composition is not known. Defined media, by contrast, have a precise, known chemical formula.

Multiple choice

Feels slippery?

  1. acid

  2. base

  3. salt

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A slippery feel is a characteristic physical property of bases.

Multiple choice

Chlorine is a non-metal used in

  1. Bleach

  2. Drinking Water

  3. Swimming Pools

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chlorine is a powerful disinfectant and oxidizing agent used to treat drinking water, maintain swimming pools, and as a component in bleach.

Multiple choice

Solid, liquids, and gas are all examples of

  1. physical change

  2. Unknown objects

  3. solutions

  4. states of matter
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solid, liquid, and gas are the three primary states of matter. These states are determined by the arrangement and energy of the particles.

Multiple choice

Water is a good example of a

  1. plasma

  2. solvent

  3. magnet

  4. change of state
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water is often called the universal solvent because it dissolves more substances than any other liquid. This property is crucial for biological and chemical processes.

Multiple choice

When an object changes from one state to another it is called

  1. dissolving

  2. cohesion

  3. an experiment

  4. physical change
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A physical change occurs when matter changes its form or state (like melting or freezing) without changing its chemical identity. The substance remains the same chemically.