Chemistry · General Awareness

Chemistry of Metals and Alloys

1,851 Questions

Review the physical and chemical properties of various metals and their common alloys. This collection covers industrial applications, metallurgical processes, and practical uses of elements like silicon and boron. Practice these questions to strengthen your chemistry fundamentals for exams.

Properties of metalsCommon alloysIndustrial metallurgyChemical applications

Chemistry of Metals and Alloys Questions

Multiple choice physics dual nature of matter and radiation davisson and germer experiment and its conclusion matter waves wave nature of matter

In Davisson-Germer experiment electrons were made to strike a sheet made of ______ metal.

  1. Nickel

  2. Cobalt

  3. Iron

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

Davisson and Germer experiment was conducted by two American scientists Clinton Davisson and Lester Germer, in 1927, to verify the de Broglie hypothesis that a material particle posses wave nature. 

The electron beam was made to pass through a hole and strike the nickel crystal normally, the electrons scattered in all directions acting like waves. The detector indicated the peak intensity of scattered electrons at certain angle. This maximum intensity was due to constructive interference of two waves. Thus wave nature of electrons was experimentally proved.

Multiple choice history vital villages, thriving towns construction of history sources of modern history the idea of history

Which of the following was the first metal that came into use?

  1. Gold

  2. Copper

  3. Bronze

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

Gold was the first metal that came into use by the Prehistoric man. It was discovered around 6000 BCE. It was a soft metal and were therefore predominantly used for decoration and bullion for trade. Copper came into use soon after gold.

Multiple choice chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

Which of the following is absorbed efficiently in colloidal forms?

  1. Colloidal sulphur

  2. Colloidal gold

  3. Colloidal copper

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

Colloidal sulfur is a suspension of fine sulfur particles, usually in a gum base. A good way to think about this is if one were to grind up pure sulfur and dust it into a gelatin mix before it firmed up. Colloidal sulfur is a homoeopathic 'natural' remedy used to treat skin conditions such as acne, psoriasis, eczema, and dermatitis. Colloidal sulfur can be taken orally or mixed with other ingredients and used as soap or shampoo.

Sulfur is lighter weight element and can serve as a powerful antioxidant, removing free radicals of oxygen and fluorine. Overall, colloidal sulfur is a safe substance that has been used throughout human history as a treatment for skin conditions and can be used today as an effective diet supplement.

Multiple choice chemistry patterns and properties of metals periodic trends in chemical properties alkali metals study of specific groups
Metal which is soft and floats on water is _______ .

  1. aluminium

  2. copper

  3. lead

  4. potassium

  5. iron

  6. lithium
Reveal answer Fill a bubble to check yourself
F Correct answer
Explanation

Lithium is lightest elemental metal nearly half as dense as water, so it floats on the surface and ultimately disappears, giving off hydrogen gas and forming a colourless solution of lithium hydroxide.


Hence, the correct option is $\text{F}$

Multiple choice physics electric current and its effects heating effect of electric current- uses applications of heating effect of electric current coil and fuse

The heating element in an electric iron is made up of :

  1. nichrome

  2. iron

  3. constantan

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

Answer is A.

Most heating elements use Nichrome 80/20 (80% nickel, 20% chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time. Material beneath this layer will not oxidize, preventing the wire from breaking or burning out.
Hence, nichrome is used as heating elements.

Multiple choice chemistry introduction to analytical chemistry interpreting a balanced chemical reaction percentage yield stoichiometric calculations

In ayurvedic preparation of swarnabhasma, what purity of golden will be used?

  1. $42$ % gold + silver
  2. $91$ % amalgam
  3. $24$ carat
  4. $58.5$% copper
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Swarna Bhasma is prepared from Gold. It is used in Ayurvedic treatment of infertility, asthma, tissue wasting, poisoning etc. This medicine should only be taken strictly under medical supervision.

In the given question option A is the correct answer.

Multiple choice physics magnetism and matter paramagnetic material classification of magnetic material magnetism

Out of given paramagnetic substance (Calcium, Chromium, Oxygen and Tungsten) which substance has maximum susceptibility?

  1. Calcium

  2. Chromium

  3. Oxygen

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

Susceptibility at the standard temperature, $T=300K$

Calcium $\rightarrow 1.9\times 10^{-5}$ 
Chromium $\rightarrow 2.7\times 10^{-4}$
 Oxygen $\rightarrow 2.1\times 10^{-6}$
Tungsten $\rightarrow 6.8\times 10^{-5}$
Chromium have maximum susceptibility.
The correct option is B.

Multiple choice physics magnetism and matter magnetic materials behaviour of substances in magnetic field classification of magnetic materials

Which of the following group is diamagnetic?

  1. Copper, hydrogen, silver

  2. Copper, hydrogen, argon

  3. Hydrogen, oxygen, argon

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

Diamagnetic substances are those which are freebly repelled by the magnetic field.
$\therefore$ Copper, Hydrogen, Silver are diamagnetic as their atoms have net magnetic dipole moment zero.

Multiple choice chemistry d- and f-block elements actinoids the actinoids the d-and f-block elements comparison of lanthanoids and actinoids

Most of the man-made synthetic elements occur:

  1. in actinide series

  2. in lanthanide series

  3. in coinage metals

  4. in alkaline earth metals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Synthetic elements, particularly those with high atomic numbers, are often produced through nuclear reactions and are found within the actinide series and beyond (transuranic elements).