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Day 1 - Physical and Chemical Principles > Past Board Exam Questions (2019 & 2021) > Flashcards

Past Board Exam Questions (2019 & 2021) Flashcards

1
Q

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

A

Na

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2
Q

Which isotope of boron is the most stable?
A. Boron 8
B. Boron 10
C. Boron 12
D. None of these

A

B.

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3
Q

In 1986, the nuclear reactor in Chernobyl had an accident and spewed radioactive nuclei that were carried by the winds for hundreds of miles. Today, among the child survivors of the event, the most common damage is thyroid cancer. What radioactive nucleus of Iodine do you expect to be responsible for these cancers?

A

I-131

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4
Q

What process combines rubber and sulfur at high temperatures?

A

Vulcanization

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5
Q

Who invented the Carbon-14 dating method?

A

Williard Libby

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6
Q

Melvin Calvin was known for his study of?

A

Photosynthesis

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7
Q

The only amino acid that has no chiral center is?

A

Glycine

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8
Q

How many carbon atoms are in olvanil?

A

26

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9
Q

Chemical formula of olvanil

A

C26H43NO2

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10
Q

How to differentiate alkane, alkene, and alkyne?

A

Reaction with Br2

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11
Q

Radioactive isotope for cancer therapy

A

Cobalt-60

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12
Q

Radioactive isotope for kidney scan

A

Mercury-197

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13
Q

Radioactive isotope used to measure the water content of body

A

Tritium (Hydrogen-3)

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14
Q

Radioactive isotope for heart scan in exercise

A

Thallium-201

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15
Q

Choose the process that occurs with a decrease in entropy:
A. freezing of water
B. Boiling of water
C. Dissolving of salt in water
D. Sublimation of dry ice

A

A.

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16
Q

Metal planting question, Cu(OH)2 answer (context: In the metal planting plants in Cagayan de Oro and Iligan, the waste contains 20 mg/L of Cu^(2+)

A

1.6x10^-7 mol/L

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17
Q

The person’s sense of smell and taste depend on specific biochemic receptors present in a person’s nose and mouth. In 2004, a Nobel prize was given to the researchers who established this fact and identified the type of organic compound associated with the sense of smell and taste. The chemical identified was?

A

Rhodopsin

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18
Q

The element neon was discovered in 1988 by

A

Travers and Ramsey

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19
Q

The two most common components of acid rain are

A

nitric acid and sulfuric acid

20
Q

Which of the ff is the Dow process?

A

Extraction of bromine from brine

21
Q

What type of ultrasonic flowmeter is a counter-propagating type?

A

Time-of-flight

22
Q

Who suggested that pressure sensors be divided into four categories?

A

Saunders

23
Q

Formula of red lead

A

Pb3O4

24
Q

What is the common name of this compound? C6H5OCH3?

A

Anisole

25
Q

A voltaic cell is represented by the following equation: Fe (s) + Zn2+(aq) → Fe2+(aq) + Zn(s). Which electrode is the anode?

A

Anode - Fe
Cathode - Zn

26
Q

What other particle is formed in the fusion of two protons to yield deuterium?

A

Positron

27
Q

Process of breaking down a large isotope into smaller isotopes

A

Nuclear fission

28
Q

Another term for Boyle’s Law

A

Mariotte’s Law

29
Q

Aspirin/salicylic acid problem’s answer (context, no need mag solve kay daghan typo so memorize)

A

25 g

30
Q

Where in the body does fatty acid synthesis occur?

A

Cytoplasm

31
Q

What structural characteristics do citric acid and malic acid have in common?

A

They are both hydroxy acids

32
Q

What is the difference between a coenzyme and a cofactor?

A

Cofactor is more generic; it means a nonprotein part of an enzyme. A coenzyme is an organic factor.

33
Q

Who discovered phenolphthalein?

A

Adolf von Baeyer

34
Q

How many high-energy phosphate bonds are in the ATP molecule?

A

2

35
Q

Which has higher absolute entropy at a temperature of 250C, cyclopropane or propylene? Why?

A

Propylene due to the free rotation around the carboncarbon single bond.

36
Q

Glucose is the only carbohydrate compound that the brain can
use for energy. Which pathway is mobilized to supply the need of the brain during starvation?

A

gluconeogenesis

37
Q

Crystals of a material are suspended in the middle of a cup of water at 2 deg C., How might you enable the crystals to rise to the surface of the water so that you can harvest them?

A

Increase the temperature of water to 4 deg C

38
Q

Suppose you have a phosphate buffer of pH 7.21. If you add more solid NaH2PO4 to this buffer, would you expect the pH of the buffer to increase, decrease, or remain unchanged?

A

Decrease

39
Q

These compounds are formed by the reaction of acids with alcohol

A

Esters

40
Q

Chemical formula of aquamarine

A

Be3Al2Si6O18

41
Q

Number of double bonds in geraniol

A

2

42
Q

Explain the differences in structure between a saturated hydrocarbon from an unsaturated hydrocarbon

A

A saturated hydrocarbon contains only carbon-carbon single bonds, while an unsaturated hydrocarbon contains one or more carbon-carbon double or triple bonds.

43
Q

A power plant in a college town is burning coal on a cold, clear
winter morning at 8:00 A.M… (memorize)

A

5.8 km

44
Q

The purpose of control rods in a fission reactor is to

A

Absorb neutrons generated in the fission process

45
Q

Do isotopes of the heavy elements (for example, those from atomic number 37 to 53) contain more, the same, or fewer neutrons than
protons?

A

More

46
Q

Perchloroethylene, which is a liquid at room temperature, is one of the most widely used solvents for commercial dry cleaning. It is sold for this purpose under several trade names, including Perclene. Does this molecule have polar bonds? Is it a polar molecule? Does it have a dipole?

A

Yes, non-polar, none

Day 1 - Physical and Chemical Principles (8 decks)

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