Tag: non-metals

Questions Related to non-metals

Nitrogen is an example of:

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. non-metal

  2. alloy

  3. metalloid

  4. metal

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Correct Option: A
Explanation:

In the periodic table there are 22 non metals out of which 10 non metals are solids, one non metal is liquid and remaining 11 non metal are gases.
Nitrogen is one of the 22 non metals.

Boron is an example of:

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. metal

  2. non-metal

  3. metalloid

  4. alloy

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Correct Option: C
Explanation:

Metalloid is a chemical element with properties in between or that are a mixture of those of metal and non metal. Boron is also one of the metalloids

An element $X$ has an atomic number $32$ has some properties similar to metal and some to non-metal. The $X$ is among the:

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. metal.

  2. non-metal.

  3. metalloid.

  4. none of these.

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Correct Option: C
Explanation:

Metalloids are elements which have some metals property and some non-metals property. The element $X$ is germanium which is metalloid.

An element has dull appearance, low density and low melting point are :

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. metalloid

  2. non-metal

  3. metal

  4. minerals

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Correct Option: B
Explanation:

Non-metal is an element that usually has low density, a dull appearance, a low melting point, and a poor conductor of heat and electricity.

Post transition elements belong to which group number in the periodic table?

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. 1

  2. 3 to 12

  3. 2

  4. 13 to 16

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Correct Option: D
Explanation:

Post transition elements exists from $13^{th}$ to $16^{th}$ group number in the periodic table.

Which of the following is not an ore of sulphate?

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. Anglesite

  2. Baryte

  3. Gypsum

  4. None of the above

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Correct Option: D
Explanation:

Anglesite, baryte and gypsum all are ores of sulphate.

 Which of the following is most abundant element in the earth crust?

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. Oxygen

  2.  Nitrogen

  3. Hydrogen

  4. Argon

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Correct Option: A
Explanation:

The most abundant elements in the earth crust is Oxygen as many compounds are in form of their oxides.

The most abundant element in air is nitrogen followed by oxygen.

The most abundant metal in the earth's crust is :

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. Silver

  2. Aluminium

  3. Calcium

  4. Gold

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Correct Option: B
Explanation:

The most abundant metal in the earth's crust is $Al$.

Which valence shell electrons arrangement is that of a metallic element?

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. 2, 1

  2. 2, 4

  3. 2, 5

  4. 2, 7

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Correct Option: A
Explanation:

Answer : $2, 1$

(1) $2, 1$ valence shell electrons arrangement for Lithium metal. (electronic configuration is $1s^{2} 2s^{1}$
(2) Other valence shell $e^{\ominus}$ are $p-$block elements of which is generally non-metals of metalloids.

Which of the following metal exists in free state?

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. Gold

  2. Platinum

  3. Mercury

  4. All of above

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Correct Option: D
Explanation:

A native metal is any metal that is found in its metallic form, either pure or as an alloy, in nature.

Few examples are gold and silver, platinum, mercury.

These elements exist as these are less reactive and do not form any kind of alloys in their natural state.

Option D is correct.