Tag: physical properties of non-metals

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Multiple choice chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Which of the following is the largest in size?

  1. $Br$
  2. $I$
  3. $I^-$
  4. $I^+$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Answer : $I^{\ominus}$

(1) We know that from top to bottom atomic size is increases. So $I$ its having higher atomic size then $Br$.
(2) In $I, I^{\ominus}$ and $I^{\oplus}$
$I^{\ominus}$ have the largest atomic size because $I^{\ominus}$ has one extra electron in its valence shell which lead to increase in atomic size.
$\therefore I^{\ominus} > I > I^{\oplus} > Br$.

Multiple choice chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Which characteristics are required for a element to behave as electrical conductor?

  1. It should have valence electron

  2. It should have free electron

  3. It easily provide electron to other element
  4. Both $B$ and $C$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Electrical conductors elements have free electrons, which they can easily provide to conduct electricity. This characteristics are generally available in metals.

Multiple choice chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Which allotrope of carbon do not conduct electricity?

  1. Graphite

  2. Diamond

  3. Fullerene

  4. Both b and c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon is a non-metal which have allotropic form that is graphite, diamond and fullerene. Out of this three only graphite is conductor of electricity. Diamond and fullerene do not conduct electricity.

Multiple choice chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Non-metals are brittle while metals are ductile. Why?

  1. Because of lesser extent of bonding in non-metals

  2. Because of greater extent of bonding in non-metals

  3. Because of smaller size of non-metallic atoms

  4. Because of lower conductivity of non-metals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The basic difference between metals and non-metals is the extent of bonding.Metals have very high extent of bonding than that in non-metals which makes the metal malleable. and non-metals brittle.

Multiple choice chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Which among the following non-metal is liquid at room temperature?

  1. Chlorine

  2. Bromine

  3. Mercury

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

Mercury and bromine both are present in liquid state at room temperature but mercury is metal and bromine is non-metal.

So, liquid non-metal at room temperature is bromine.