Tag: study of matter

Questions Related to study of matter

Which one of the following element forms interstitial compounds?

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

  1. $Fe$

  2. $Co$

  3. $Ni$

  4. $Sc$

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Correct Option: C

Most of the work on Transuranic element was done by 

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

  1. Bohr

  2. Seaborg

  3. Mc Millan

  4. Slater

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Correct Option: A

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

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

  1. 68

  2. 72

  3. 50

  4. 32

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Correct Option: B

Which of the following is an ionic compound?

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

  1. ${ SO } _{ 3 }$

  2. $ICl$

  3. $KI$

  4. ${ CHCl } _{ 3 }$

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Correct Option: C
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.

Which one is the man made element ?

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

  1. Fe

  2. Ru

  3. Te

  4. none

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Correct Option: C

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

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

  1. Nitrogen

  2. Carbon

  3. Fluorine

  4. Sulphur

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Correct Option: D

Different states of matter are_________.

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

  1. Gas

  2. Liquid

  3. Solid

  4. all of above

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Correct Option: D
Explanation:

Atoms and molecules are all composed of matter. Matter is anything that has mass and takes up space.
Three basic forms of matter are solid, liquid and gas.

Hence, option $D$ is correct.

Milk is a compound.

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

  1. True

  2. False

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Correct Option: B
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.

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

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

  1. Element

  2. Mixture

  3. Compound

  4. None of these

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Correct Option: C
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.

Which of the following is a compound?

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

  1. $NaCl$

  2. $KCl$

  3. $NaOH$

  4. All of the above

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Correct Option: D
Explanation:

A compound is a chemical species that is formed when two or more atoms join together chemically, with covalent or ionic bonds.
Examples: $NaCl$, $KCl$ and $NaOH$