Chem Tech pdf file

Along a row in the periodic table of elements have the same

energy level

size configuration

size

electronegativity

energy level

How many pi bonds are there in a double bond?

1

In which of the following pairs the species have similar geometry?

CO2 and SO2

CO32- and SO32-

NH3 and BH3

SO42- and ClO4-

SO42- and ClO4-

The electrons off metals are free to move in a solid. This explains why

metals are unstable

metals have high reflectivity

metals can easily molded

metals have high conductivity

metals have high conductivity

All isotopes of a given element have

equal number of protons and neutrons

the same number of protons

the same number of atomic mass unit

the same number of neutrons

the same number of protons

Who was credited for the discovery of oxygen?

C. W. Scheele

J.B. Priestly

J. Dalton

A. Lavoiser

J.B. Priestly

The property of a porous body which permits a gas or a liquid to flow through it is

diffusion

osmosis

permeability

viscosity

permeability

One sample of a solution with a pH of 10 is tested with phenolphthalein and another sample of this solution is tested with litmus. In this solution the color of the litmus is

blue and the phenolphthalein is pink

red and the phenolphthalein is pink

blue and the phenolphthalein is colorless

red and the phenolphthalein is colorless

blue and the phenolphthalein is pink

Atoms of which element have the highest first ionization energy?

{ from left to right increasing and from top to bottom decreasing }

calcium

potassium

sodium

magnesium

magnesium

The major components in acid rain are acids forme from ______

NOx and SOx

NOx and CO2

SOx and CO2

CO and CO2

NOx and SOx

Which of the following types of radiation will be stopped by a piece of paper?

alpha

gamma ray

neutron

x-ray

alpha

A benzene ring with one hydrogen removed

benzyl

alkyl

aryl

phenyl

phenyl

The Lucas test is used to determine the types of

alcohols

amines

acids

amino acids

alcohols

Acid and alcohol are obtained by the hydrolysis of

ester

ethyl bromide

acetic anhydride

all of the above

ester

Which of the following is a tertiary alcohol?

{ -OH functional group is attached to a tertiary carbon. tertiary ___carbon is bonded to thre other atoms}

ethanol

2-hexanol

1-pentanol

2-methyl-2-hexanol

2-methyl-2-hexanol

HCl reacts vigorously with this compound to form polyvinyl chloride

ethyne

ethylene

ethane

butene

ethyne

According to the uncertainty principle, it is impossible to precisely determine at the same time a particles's

position and charge

position and momentum

momentum and energy

charge and mass

position and momentum

Cathode rays are

alpha particles

electrons

gamma rays

protons

electrons

The shape of ammonia molecule (NH3) is best describes as

linear

pyramidal

bent

triangular

pyramidal

Which of the following is also known as soda lye or caustic soda which is used in the manufacture of soap?

ammonia

sodium hydroxide

sodium chloride

sodium carbonate

sodium hydroxide

In HAsO3^2-,, what is the oxidation state of As?

-5

+6

-2

+3

+3

Which has the gradient rest mass?

alpha particle

proton

neutron

electron

alpha particle

Prussic acid has a formula of

HNO3

C6H5OH

HCN

H2SO4

HCN

Which of the following is covalently bonded?

MgO

KCl

NaCl

CaCl2

MgO

Discovered water by exploding hydrogen and oxygen.

Lewis

Lavoiser

Cavendish

Huey

Cavendish

Jellies and paints are example of

gel

sol

emulsion

aerosol

sol

Optical pyrometer is used to

determine the voltage at the junction of dissimilar metals

measure temperatures of solid objects at temperature above 700C

determine the density of an ideal gas

measure turbidity of wastewater

measure temperatures of solid objects at temperature above 700C

Buffer solutionresits changes in acidity. If an acid is added to a buffer solution, the _______remains the same

pH

concentration

molality

mole fraction

pH

Which of the following is a heavy ductile metal?

Mn

Mg

Ni

Al

Ni

The type of intermolecular bond present in water is

__a special dipole-dipole attraction. Attractive force between hydrogen to N, O or F....

extended covalent

polar bond

ionic bond

hydrogen bond

hydrogen bond

When atoms collide, they do not lose energy. This is because

collisions are inelastic

collisions are adiabatic

collisions are elastic

collisions are frictionless

collisions are elastic

The IUPAC name of the compound having the formula (CH3)2CHCH2CH2Br is

2-methyl-3-bromopropane

1-bromopentane

2-methyl-4-bromobutane

1-bromo-3-methylbutane

1-bromo-3-methylbutane

Isopropyl alcohol is

a primary alcohol

a secondary alcohol

a tertiary alcohol

a phenol

a secondary alcohol

The state at which the rate of forward reaction is equal to the rate of backward reaction.

eutectic state

equilibrium state

ideal state

reversible state

equilibrium state

The compound CH3-Ch=C-CH2-CH3 -CH3 is called

1-ethyl-2-butene

3-methyl-3-pentene

3-methyl-2-pentene

3-ethyl-2-butene

3-methyl-2-pentene

Oxidation of secondary alcohol produced

ketone

aldehyde

acid

ester

ketone

Identify the functional group

O = C--OH

ether

carbonyl

hydroxyl

carboxyl

carboxyl

Given the IUPAC name of the compound with the structural formula given below:

2,5,5-trimethyl-3-hexyne

3,3,6-trimethyl-4-heptyne

2,5,5-trimethyl-3-heptyne

2,5,6-trimethyl-3-heptyne

2,5,5-trimethyl-3-heptyne

Which are unsaturated?

alkenes and alkynes

alkanes. alkenes, and alkynes

alkanes and alkenes

alkanes and alkynes

alkenes and alkynes

Oxygen double bonded with carbon is

hydroxyl

carboxyl

carbonyl

alkyl

carbonyl

Functional group common to aldehydes and carboxylic acids

carbonyl group

carboxyl group

hydroxyl group

amino group

carbonyl group

Transition elements are found in the

d and f block

s block

p block

d block

d and f block

A chemical reaction which requires heat to produce products.

reversible reaction

irreversible reaction

exothermic reaction

endothermic reaction

endothermic reaction

Which of the following has the greates affinity to electrons

Na

Cl

Br

K

cl

Electron Affinity is defined as

the change in energy when a gaseous atom in its ground state gains an electron

the pull an atom has on the electrons in a chemical bond

the energy required to remove a valence electron from a neutral gaseous atom in its ground state

the energy difference between an electron in its ground and excited states

the change in energy when a gaseous atom in its ground state gains an electron

it is defined as the tendency of an atom to attract electrons

Ionization energy

electronegativity

electron affinity

activation energy

electronegativity

Elements in a given period have the same

atomic weight

maximum azimuthal quantum number

maximum principal quantum number

valence electron structure

maximum principal quantum number

Group 1R elements are also known as

alkaline earth metals

alkali metal

halogen

chalcogen

alkali metal

The mass contribution of an electron in an atom is

1/1837 that of proton

equal to that of proton

equal to that of neutron

half that of the neutrons

1/1837 that of proton

What bond posses the highest thermal and electrical conductivity?

ionic bond

covalent bond

metallic bond

hydrogen bond

metallic bond

How many atoms are there in a molecule of sucrose?

C12H22O11

45

On heating glucose with Fehling's solution we get a precipitate whose color is

red

Hydrocarbons that contain one or more carbon triple bonds

alkynes

An atomic bond resulting from the formation of a molecule orbital by the head-on collision of atomic orbitals.

sigma bond

pi bond

ionic bond

covalent bond

sigma bond

What subatomic particle has the same mass as proton?

electron

positron

neutron

beta particle

neutron

Compounds with the general fromula (C5H8)n

alkenes

terpenes

elastomers

enantiomers

terpenes

Brimstone is

charcoal

sulfur dioxide

sulfur

form of diamond

sulfur

Which of the following is a primary alcohol?

I, II and III

I only

III only

II only

I only

Brass is an alloy of

Cu and Zn

Cu and Sn

Fe and C

Fe and Ni

Cu and Zn

Commercially important ore of lead is

siderite

galena

Sphalerite

haematite

galena

A complete fertilizer contains

N, P and K

Na, P and K

N, P and C

N, P and S

N, P and K

The process to transform long chain hydrocarbon into small chains.

cracking

isomerization

polymerization

fusion

cracking

When a real gas approaches an ideal gas, compressibility factor approaches

0

1

infinity

above zero

1

it refers to waste or scrap glass, usually ground.

cullet

feldspar

fluorospar

glass float

cullet

Who discovered radioactivity?

Henri Becquerel

Wilhelm Roentgen

Piere & Marie Curie

Neils Bohr

Henri Becquerel

Oil water and ____ will form a stable emulsion.

butter

starch

soap

margarine

starch

At triple point, What is the variance, F = ___, where it is invariant?

0

A radioactive isotope that is now widely used in cancer treatment is

cobalt-60

deutrium

tritium

sodium-24

cobalt-60

Hardness of diamond is due mainly to a large amount of

covalent bond

hydrogen bond

Ionic bond

sigma bond

covalent bond

Who among the scientist mentiones applied zeolite to commercial use of water - softening in what is known as the Permutit water softening process?

Adams and Holmes

Alex Fredric Cronstedt

Robert Gans

Thomas Clark

Robert Gans