Question 1

During an experiment, accidently iodine got mixed up with a biological sample of proteins and polys. Identify the smallest colloid that can be obtained during the process of separation.&#10;A)fats&#10;B)amino acids&#10;C)polys&#10;D)r molecules

Accepted Answer

Amino acids are the smallest colloid that can be obtained during the process of separation, as they are the building blocks of proteins.

Question 2

Which of the following form of colloid is considered to be the strongest colloid?&#10;A)gel&#10;B)foam&#10;C)solid sol&#10;D)liquid sol

Accepted Answer

Solid sols are considered the strongest colloids because they have a solid dispersed phase and a solid dispersion medium, which gives them a very stable and rigid structure compared to gels, foams, and liquid sols.

Question 3

Which of the following form of colloid is considered to be the lightest colloid?&#10;A)gaseous foam&#10;B)solid sol&#10;C)sol&#10;D)liquid sol

Accepted Answer

Gaseous foam is considered the lightest colloid because it consists of a gas dispersed in a liquid or solid, making it less dense compared to other types of colloids such as solid sols, sols, and liquid sols.

Question 4

What is the size of normal an amino acid?&#10;A)1 to 2 nm&#10;B)2 to 3 nm&#10;C)4 to 5 nm&#10;D)2 to 5 nm

Accepted Answer

Amino acids are typically around 0.5 to 1.5 nm in size, with an average size often cited as approximately 0.75 nm or 7.5 Å. Therefore, the range of 1 to 2 nm is the closest to their actual size.

Question 5

What is called a dispersion phase?&#10;A)it is the main layer&#10;B)it is the secondary layer in which the colloidal particles are dispersed&#10;C)it is the secondary layer&#10;D)it is the basic colloidal layer

Accepted Answer

The dispersion phase in a colloidal system refers to the medium or phase in which the colloidal particles are dispersed. It acts as the continuous phase surrounding the dispersed particles or phase.

Question 6

What is called a dispersion medium?&#10;A)it is where the dispersed phase settles&#10;B)it is where the solute particles settle&#10;C)it is where the dispersed phase is suspended&#10;D)it is the primary medium

Accepted Answer

The dispersion medium is the medium in which the dispersed phase is suspended, providing stability and uniformity to the dispersion.

Question 7

When does an integrated circuit exhibit greater degree of freedom and electrical performance?&#10;A)in thin and thick film technology&#10;B)in semiconductor technology&#10;C)in semiconductor and films technology&#10;D)in thick film technology only

Accepted Answer

The answer of When does an integrated circuit exhibit greater...

Question 8

Give the thickness range of the film used in thin film technology&#10;A)0.5-2.5 mils&#10;B)0.02-8 mils&#10;C)10-20 mils&#10;D)0.05-0.0 7mils

Accepted Answer

Thin film technology typically involves the use of films that are very thin, often ranging from 0.02 to 8 mils. This range allows for the precise control of the film's properties, which is crucial for various applications in electronics, optics, and other fields.

Question 9

Which technology is used to get cheap resistors and capacitors?&#10;A)thick film technology&#10;B)thin film technology&#10;C)thin and thick film technology&#10;D)none of the mentioned

Accepted Answer

The answer of Which technology is used to get cheap...

Question 10

How is the process of film deposition carried out in cathode sputtering?&#10;A)slower than evaporation method&#10;B)faster than evaporation method&#10;C)similar to same as evaporation method&#10;D)all of the mentioned

Accepted Answer

Cathode sputtering is generally slower than the evaporation method because it involves the physical removal of material from a target through bombardment with high-energy particles, which is a less efficient process compared to the direct evaporation of material.

Question 11

How a uniform film with good crystal structure is attained in cathode sputtering process?&#10;A)by hitting high energy particle directly on the substrate&#10;B)allowing less time for the particles to deposit on the substrate&#10;C)high energy particle diffuse through low pressure gas and deposits on the substrate&#10;D)heavy inert gas is used for film deposition on the substrate

Accepted Answer

The answer of How a uniform film with good crystal...

Question 12

Which process is used to deposit metals on glass, ceramic and plastic?&#10;A)silk plating technique&#10;B)gas plating technique&#10;C)electroless plating technique&#10;D)electroplating technique

Accepted Answer

The answer of Which process is used to deposit metals...

Question 13

Electroplating technique is suitable for&#10;A)making conduction films ceramic&#10;B)coating with considerable thickness&#10;C)coating without use of electric current&#10;D)making conduction films of gold or copper

Accepted Answer

The answer of Electroplating technique is suitable for&#10;A)making conduction films...

Question 14

Which of the following process is involve in thick film technology&#10;A)screen printing&#10;B)ceramic firing&#10;C)silk screening&#10;D)all of the mentioned

Accepted Answer

The answer of Which of the following process is involve...

Question 15

An ancient process used till today for production of circuit films is,&#10;A)silk screening technique&#10;B)surface mount technology&#10;C)ceramic printing technique&#10;D)screen printing technique

Accepted Answer

The answer of An ancient process used till today for...

Deck 3: Colloids, Fiber Fabrication, Thin Film Technology, and Electroplating