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Past Boards (ChE) > Day 1 > Flashcards

Day 1 Flashcards

1
Q

Particle with the same mass of proton

A

Neutron

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2
Q

What does a nucleus atom contain?

A

Protons and neutrons

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3
Q

Who discovered radioactivity?

A

Henri Becquerel

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4
Q

Who discovered vulcanization?

A

Charles Goodyear

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5
Q

Number of carbon atoms in olvanil?

A

26 (C26H43NO3)

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6
Q

Formula of Alar

A

C6H12N2O3

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7
Q

Author of Octet Rule

A

Gilbert Lewis

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8
Q

Formula of red lead

A

Pb3O4

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9
Q

Which layer of the atmosphere contains the ozone layer?

A

Stratosphere

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10
Q

Composition of acid in acid rain

A

Sulphuric and Nitric acids

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11
Q

Chemical formula for 11-tetradecenyl acetate

A

C16H30O2

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12
Q

Nearest layer of the atmosphere from the earth’s surface

A

Troposhere

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13
Q

How to differentiate alkane, alkene and alkyne?

A

Reaction with Br2

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14
Q

Adolf Bayers contribution in medicine, made by reacting malonic acid and urea with a catalyst is called

A

Barbituric acid

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15
Q

An organic reaction where the unsaturated bonds of alkanes, alkynes or azo compounds are cleaved with ozone

A

Ozonolysis

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16
Q

Developed by Pehr Edman, is a method of sequencing amino acids in a peptide

A

Edman degradation

17
Q

What is the other name for bulk temperature?

A

Mixing cup temperature

18
Q

Where does the enzyme capsaicin commonly found

A

Capsicum

19
Q

Common method for the removal of fine particles in hot airstream common in cement production

A

ESP

20
Q

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

A

Heating Nh4Cl with AgCN to form urea

21
Q

What is the common form of nitro-glycerol

A

Nitroglycerin

22
Q

Common contaminant on BTEx process

A

Benzene, Toluene, Ethylbenzene and Xylene

23
Q

A bond in which electrons are shared between elements having a difference in electronegativity of between 0.5 and 2

A

Polar Covalent Bond

24
Q

Arrange in increasing melting point

palmitic, stearic, oleic

A

Oleic, palmitic, stearic

25
Q

What is the primary use of ethylene

A

Ripening of fruits

26
Q

What law is the PRC Modernization Act?

A

Republic Act No. 8981

27
Q

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

A

Increase

28
Q

Formation of glucose from non-carbohydrate sources

A

Gluconeogenesis

29
Q

Polymer use in bulletproof vest

A

Linear polyethylene

Nagwa ni sa board exam namun

30
Q

Who discovered resonance?

A

Linus Pauling

31
Q

What is the chemical used in sunblock

A

ZnO

32
Q

Liquid nitrogen is placed in an erlenmeyer flask. Hard boiled egg is then placed on top of the opening, what will happen?

A

Egg will be sucked in

33
Q

Ketone and aldehyde in alcohol will form

A

Ketals and acetals

34
Q

What is the first step in utilizing proteins

A

Hydrolysis

35
Q

What is the molecular weight of sucrose

A

342

36
Q

How does alpha, beta and gamma particle affect the mass number of an atom

A

4, 0, 0

37
Q

Can oxygen be synthesized from nitrogen?

A

Impossible

Past Boards (ChE) (1 decks)

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