Chemistry · 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 chemistry basic analytical techniques partition coefficients solvent extraction separation methods

Heavy water is called as heavy because it:

  1. is denser than common water

  2. is an oxide of deuterium

  3. has a heavy or bad test

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Heavy water in which deuterium, a heavy isotope of hydrogen, takes the place of hydrogen. Heavy water has physical and chemical properties that are like those of ordinary water, but heavy water is 10 percent heavier and has higher freezing and boiling points.


Hence, option B is correct.

Multiple choice chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

Which of the following is potable water?

  1. A glass of water fit for drinking

  2. Water in a pot

  3. Sea water

  4. Water with bacteria and chemicals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A glass of water is fit for drinking. Water in a pot may contain impurities like dust, sand, etc. Sea contains huge number of impurities including huge levels of salts and water with bacteria and chemicals and is not preferred for drinking. 

Multiple choice chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

Lime water turns milky when exposed. to air and stirred. This shows that air contains:

  1. carbon dioxide

  2. hydrogen

  3. nitrogen

  4. oxygen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lime water turns milky when exposed to air and stirred as lime water mixes with $CO _{2}$ and forms $CaCO _{3}$ (calcium carbonate) which turns the lime water milky. 

$CaO+CO _{2} \longrightarrow CaCO _{3}$

Multiple choice chemistry element, compound and chemical reaction materials around us materials around us and different types of houses matter and its states

Plasma state refers to:

  1. super cooled gaseous state

  2. super heated gaseous state

  3. super cooled liquid state

  4. super heated liquid state
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plasma state refers to the super heated gaseous state.
Plasma state is obtained by heating a gas above 5000 $^o$C. The number of electrons in the atoms or molecules decreases or increases, to form positively or negatively charged ions and also the molecular bond breaks.