GENERAL CHEMISTRY AND MATERIAL SCIENCE

premopremo remo · 75問 · 2年前

通報

問題一覧

Salt water, rubber, iron rust are called

chemicak compound

A substance that losses electron during an oxidation reduction process

reducing agent

.When the charge of an atom becomes unbalanced, the charge atom is called

an ion

What is the chemical formula of Dinitrogen Pentoxide?

N2O5

Carbon and Hydrogen containing only carbon single bond

Alkanes

Which of the following gases is classified as electronegative?

Sulfur hexafluoride

The number of atomis per unit cell in a Face-Centered-Cubic (FCC) structure is

What the first coordination number for a Body Centered Cubic (BCC) crystal structure?

The ores from which aluminum is obtained is

Bauxite

The purpose of Aluminum in steel alloying is

deoxidize

Steel used for axles, gears and similar parts requiring medium to high hardness and high strength is known as

medium carbon

Glass is said to be an amorphous material. This means that:

it has no apparent crystal structure

What is the process of heating raw rubber with less amount of sulfur

Vulcanization

What is a substance that cannot be decomposed into simpler substances during ordinary chemical reactions?

elements

Liquid in chemistry is

solvent

Chemical symbol of Sodium Oxide

Na2O

What is the empirical formula for nitric acid?

HNO3

Which of the following is highly reactive in its pure form?

What are the elements comprises vinegar?

Carbon, Hydrogen,Oxygen

Elements which generally exhibits multiple oxidation state are

transition elements

In electrolysis, the anions migrate to the anode. Which of the following ions migrate to th other electrode?

Cations

How are elements numbered 58 to 71 in the periodic table called

Lanthanons

What theory of atomic structure which stated that no two electrons in a given atom can have the same set of four quantum numbers?

Pauli

The statement that equal volumes of all gases under the same conditions of temperature and pressure contain very nearly the same number of molecules is known as

Avogadro's law

Base samples causes litmus to turn

blue

Gases water, alcohol and benzene are examples of

Newtonian fluids

Minimum energy needed for reaction is called

Activation Energy

In the periodic table of elements, the number of new artificially prepared (synthetic) elements is

What is the molecular weight of Nitric acid (HNO3)

63.01

Determine the molecular formula of hydrocarbon which has a molecular weight of 84 g/mol and which contains 85.7% carbon

C6H12

Caustic soda, NaOH, can be prepared commercially by reaction of Na3CO3 with slaked lime, Ca(OH)2. How many gram of NaOH can be obtained by treating 1.00 kg of Na2CO3 with Ca(OH)2

755

What is used for predicting the behavior of non-ideal gases?

Compressibility factor

What element is known as the lightest metal?

Lithium

What is the oxidation state of Aluminum?

Which is the strong bond between hydrogen atoms known as?

The covalent bond / hydrogen bond

When a solid has a crystalline structure, the atoms arranged in repeating structures called

Unit cell

In a crystal structure, which is an interstitial atom?

An extra atom sitting at a non lattice point

The ores from which zinc is obtained is

Sphalerite

What group of steels are air-hardened, medium alloy tool steels?

group A

The purpose of copper in steel alloying is to increase

atmospheric corrosion resistance

Which of the following materials is NOT a Viscoelastic matenal

Metal

The molecules of the same composition, what are variations of atomic arrangement know as

Isomers

What impunty in steel can cause red shortness" which means the steel becomes unworkable at high temperature

Sulfur

It is the ratio molecular weight of a polymer to the molecular weight of a single monomer

Degree of polymerization

Compressive strength of fully cured concrete is most directly related to

water cement ratio

When an air entrainment agent is introduced into a concrete mix

the stregth will decrease

Which of the following may be the Poisson ratio of a material?

0.45

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