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lol > ChE day1 > Flashcards

ChE day1 Flashcards

1
Q

Process of breaking down a large isotope into smaller isotopes

A

nuclear fission

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2
Q

Author of octet rule

A

gilbert lewis

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3
Q

Iodine vapor forms iodine crystals when it touches a cold surface. What is the reverse of
the process being described?

A

sublimation

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4
Q

Notation on alkane containing Cl

A

Chloro

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5
Q 
Given: Dodecane
I. Is it soluble in water?
II. Is it soluble in hexane?
III. Is it combustible?
IV. Is it solid, liquid or gas at room temp. & atmospheric conditions?
V. Is it denser than water?
A

no, yes, yes, liquid, less dense

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6
Q

Description of a primary and a secondary cell

A

primary cell can be recharged (Ni-Cd)

secondary cell can not be reacharged (dry cell)

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7
Q

Which layer of the atmosphere contains the ozone layer

A

stratosphere

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8
Q

Which of the ff has a higher heat of combustion on a gram per gram basis if Hf is 237 kj/mol and 532 kj/mol for methane and propane respectively

A

methane

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9
Q

How to differentiate alkane alkene and alkyne

A

reaction with Br2

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10
Q

Which of the ff. has a larger ionic nucleus? Na+ or Na?

A

Na

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11
Q

Particle with the same mass as proton.

A

Neutron

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12
Q

Arrange in increasing level of toxicity 1: heptachlor 2: dieldrum 3: DDT 4: Arsenic 5: Cr

A

4,

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13
Q

Polymer used in bullet proof vest

A

polymethylacrylate

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14
Q

who discovered x-ray?

A

Wilhelm Conrad Roentgen

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15
Q

other name for alkanes

A

paraffins

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16
Q

other name for alkenes

A

olefins

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17
Q

center of an atom

A

nucleus

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18
Q

blanket of pollutants

A

smog ( nitrogen oxides, sulphur oxides, ozone, smoke and other particulates)

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19
Q

Nearest layer of atmosphere from earth’s surface

A

troposhpere

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20
Q

a method of sequencing amino acids in a peptide

A

edman degradation

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21
Q

primary use of ethylene

A

ripening of fruits

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22
Q

contaminants in the BTEx process

A

benzene, ethylbenzene, toluene and three isomers of xylene

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23
Q

Where does an enzyme capsaicin commonly found?

A

Capsicum

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24
Q

What is the other name of bulk temperature?

A

Mixing-cup temperature

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25
Q

common method in the removal of fine particle in hot airstream common in cement production

A

Venturi Scrubber

26
Q

method that Wohler do to break the vital force theory in nature

A

Heating of NH4Cl with AgCN to form Urea

27
Q

Arrange the following substance in terms of increasing melting point: Palmitic, steric, oleic

A

oleic

28
Q

common form of nitro-glycerol

A

Nitroglycerin (NG) (explosives)

29
Q

Bonding of heteronucleus with unequal sharing of elecetrons

A

polar covalent

30
Q

What is the most polar and least polar of the following functional groups: R-OH, R-NH3, R-COOH, C triple bond C and C-C

A

most polar: c-c

least polar: c triple bond c

31
Q

range of melting point of saturated fatty acids

A

100-110C

32
Q

range of melting point of unsaturated fatty acids

A

70-85C

33
Q

What happen to the pH of carbonated drinks if it open in atmospheric condition?

A

decrease

34
Q

What happen to the enthalpy content of the real gases when it is throttled at constant temperature

A

nothing

35
Q

set of processes performed by a living being that allows them to interchange matter and energy with the environment

A

metabolism

36
Q

disintegration of complex organic compounds to release energy

A

catabolism

37
Q

arrangement of organic compounds from simpler compounds to store energy

A

anabolism

38
Q

recognizes the important role of professionals in nation-building and, towards this end, promotes the sustained development of a reservoir of professionals whose competence has been determined by honest and credible licensure examinations and whose standards of professional service and practice are internationally recognized and considered world-class brought about the regulatory measures, programs and activities that foster professional growth and advancement

A

prc modernization act

39
Q

Choose whether the following is/are representation of the nuclear fusion: The big bang theory, the radiant energy of the sun, the formation of deuterium/tritium.

A

the formation of deuterium/tritium

40
Q

occurs when a previously stable material has been made radioactive by exposure to specific radiation

A

induced radioactivity

41
Q

The phenomenon by which even light elements are made radioactive by artificial or induced methods

A

artificial radioactivity

42
Q

two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles

A

Hydrogen Fusion Reaction

43
Q

comprises cosmic radiation and the radiation arising from the decay of naturally occurring radionuclides

A

natural radioactivity

44
Q

Is it possible to have a pH of 0?

A

no (0 pH is only possible in theory)

45
Q

most penetrating radiation

A

gamma

46
Q

what does citric and malic acid have in common?

A

both carboxylic acid?

47
Q

is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation

A

radioactivity

48
Q

who discovered radioactivity?

A

henri becquerel

49
Q

who discovered vulcanized rubber

A

charles goodyear

50
Q

how old is the earth?

A

4.543 billion years

51
Q

a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12. It is equal to approximately 1.66 x 10-27 kg.

A

atomic mass unit

52
Q

person behind carbon dating method

A

willard libby

53
Q

which floar? balsa wood ethylne glycol, table salt, ethanol

A

balsa wood

54
Q

fundamental class of reactions in which an electron rich nucleophile selectively bonds with or attacks the positive or partially positive charge of an atom or a group of atoms to replace a leaving group

A

nucleophilic substitution

55
Q

where is the ozone layer found?

A

stratosphere

56
Q

synthetic dye

A

canotenoid

57
Q

At a constant temperature, the amount of a given gas dissolved in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid.

A

henry’s law

58
Q

process to obtain an IR spectrum of a solid

A

nujol mull process

59
Q

sign convention of enthalpy during endothermic reaction

A

positive

60
Q

position and the velocity of an object cannot both be measured exactly, at the same time, even in theory

A

heisenberg uncertainty principle

61
Q

polymer used for printing and coating

A

Styrene acrylic ??

62
Q

internal energy is compossed of all energy except: free energy, kinetic and potential energy, heat of fusion, enthalpy

A

enthalpy?

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