Tag: study of matter

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Questions Related to study of matter

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Which one of the following element forms interstitial compounds?

  1. $Fe$
  2. $Co$
  3. $Ni$
  4. $Sc$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Interstitial compounds are formed when small atoms like H, C, or N are trapped inside the crystal lattice of transition metals. While many transition metals form these, Nickel is a classic example of a metal that forms such compounds.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Most of the work on Transuranic element was done by 

  1. Bohr

  2. Seaborg

  3. Mc Millan

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

Glenn T. Seaborg led the team that discovered and researched most of the transuranic elements (elements with atomic numbers greater than 92), including plutonium, americium, curium, and others.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

How many elements is expected in period number 10 of the periodic table?

  1. 68

  2. 72

  3. 50

  4. 32
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The number of elements in a period is determined by the number of orbitals being filled. For period n, the number of elements is given by 2 * (n+1)^2 / 4 or similar patterns; for period 10, the calculation leads to 72 elements based on the filling of 8s, 5g, 6f, 7d, and 8p orbitals.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Which of the following is an ionic compound?

  1. ${ SO } _{ 3 }$
  2. $ICl$
  3. $KI$
  4. ${ CHCl } _{ 3 }$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
An ionic compound is composed of cation and anion and by the electrostatic force of attraction. But after formation, cation attracts the electron pair towards itself and cause some deformation of electron density of anion. Above all if the ionic character predominates over covalent character, then we call it ionic.

$KI$ consist of $K^+ $ cations  and $I^-$ anions.

The bond is purely ionic and the compound is ionic.


Option C is correct.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

$0.14\ g$ of an element on combustion gives $0.28\ g$ of its oxide. That is that element?

  1. Nitrogen

  2. Carbon

  3. Fluorine

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

Mass of element = 0.14g, Mass of oxide = 0.28g. Mass of oxygen = 0.28 - 0.14 = 0.14g. Equivalent weight = (Mass of element / Mass of oxygen) * 8. Equivalent weight = (0.14 / 0.14) * 8 = 8. Sulphur has an equivalent weight of 8 (valency 2, atomic mass 32).

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Milk is a compound.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Milk is not compound. A compound is an entity consisting of two or more different atoms associating with chemical bonds. Milk is an emulsion or colloid of fat globules within a water-based fluid that contains dissolved carbohydrates and protein aggregates with minerals.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

What will be the product, if dilute hydrochloric acid is added to $FeS$?

  1. Element

  2. Mixture

  3. Compound

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If you heat iron filings ans sulphur to a sufficiently high temperature you form iron sulphide 
$Fe + S \rightarrow FeS$
If you add HCl to this the following reaction occurs: 
$FeS + 2HCl \rightarrow FeCl _2 + H _2S$ 
$H _2S$ gas is given off and iron chloride is produced. 

Both are chemical compounds.