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D1 > Oct 2023 > Flashcards

Oct 2023 Flashcards

1
Q

The heating of air inside a balloon is best explained by which gas law?
(a) Avogadro’s Law
(b) Gay-Lusaac’s Law
(c) Ideal Gas Law
(d) Charle’s Law

A

Charle’s Law

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2
Q

Statement regarding beta emission. Which material is best used for protection against beta emission?
(a) Aluminum
(b) lucite
(c) lead
(d) steel

A

Lucite

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3
Q

Which layer of the atmosphere can the ozone be located?

A

Stratosphere

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4
Q

Which subatomic particle carries/determines the chemical properties of an element?

A

Electron

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5
Q

In redox reactions, which property changes when oxidation
occurs?

A

Charge

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6
Q

Which of the following instruments are used for detecting ionizing radiation at an instant?
(a) Film badge, scintillation counter
(b) Scintillation counter, Geiger counter
(c) Film badge, scintillation counter, Geiger counter
(d) Film badge, Geiger counter

A

Scintillation counter and Geiger

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7
Q

Which of the following statements is/are true about nuclear fusions? All statements are true, except to that statement saying na ‘nuclear fusions are chain reactions.’

A

A,C,D

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8
Q

Determine the oxidation number of chromium in CrF6^(3+)

A

3

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9
Q

Arrange the following based on level of toxicity: heptachlor, dieldrin, DDT, Arsenic, Cr

(Answer is from chat gpt)

A

Arsenic, dieldrin, heptachlor, DDT, Cr

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10
Q

Balance the oxidation reaction of Butane.
C4H10 + O2 –> CO2 + H2O

A

2,13,8,10

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11
Q

Monosaccharides have yellow appearance and are soluble in water. True or False? Why?

A

False, they are colorless and water soluble.

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12
Q

Which sector uses the most of freshwater supply in United States?
(a) Industry
(b) Farmer
(c) Residential

(Answer is from chat gpt)

A

Farmer

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13
Q

What is a buckyball?

A

fullerene

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14
Q

What is the formula of buckyball?

A

C60

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15
Q

What is the molecular weight of sucrose?

A

342 g/mol

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16
Q

What is the molar mass of air?

A

29 g/mol

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17
Q

Which of the following were discovered by Curie?

A

Radium and Polonium

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18
Q

What is the product when alkyl halide is reacted with hydroxy group?

A

alcohol or alkene (?)

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19
Q

What is the practical
application of Joule Thomson effect?

A

cooling

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20
Q

Who initiated the development of periodic table?

A

Dmitri Mendeleev

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21
Q

Who discovered photosynthesis?

A

Melvin Calvin

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22
Q

Who discovered Theory of Valence?

A

Linus Pauling

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23
Q

The concentration of diazinon has been measured to be
42.8 ug/L. A study of the Matsu Fish (pinalitan ng Tilapia
ang name ng fish) revealed an average lipid concentration
of 30,600 ug/kg. What is the bioconcentration factor for the fish (Environmental Engg Davis Problem P5-13)

A

715

24
Q

(Environmental Engg Davis Problem Example 4-10). Problem was modified, question is finding the reaction rate.

A

0.4 mg/L min

25
Q

What is the composition of acid rain?

A

Nitric Acid and Sulfuric Acid

26
Q

First statement is regarding heterocyclic compounds. Which of the following is a pair of heterocyclic compounds?
(a) cyclohexane & cycloheptane
(b) Acetic anhydride & butyric anhydride
(c) furan and pyran

A

furan and pyran

27
Q

What is the advantage of using diimide as
a reducing agent?
Some of the choices:
(a) It allows the addition of O to the C=O, N=O, C=C
bond + explanation ….
(b) It allows the addition of H to the C=O, N=O, C=C
bonds leaving the functional groups of the compound untouched.

A

NA

28
Q

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

A

4, 0, 0

29
Q

This refers to the ability of an object to resume its normal shape after being stretched or compressed.

A

Elasticity

30
Q

Hydrazine reacts with dinitrogen tetroxide to form nitrogen gas. How many kg of nitrogen gas can be formed from 200 kg of hydrazine?

A

262 kg

31
Q

If a labelled fatty acid with radioactive carbon-14 is fed to
an experimental animal, in what type of compounds contained in the breath of the animal would the radioactive material appear?

A

CO2

32
Q

A boiled egg is placed above an Erlenmeyer flask. The flask is then placed in a liquid nitrogen bath. What happens to the gas pressure inside the flask?

A

Decreases

33
Q

This is used in titration to cause change of color.

A

Indicator

34
Q

Which of the following is true for alkali metals?
(a) Alkali metals have low melting point
(b) Alkali metals have low melting point depending on the pressure
(c) Alkali metals have low melting point depending on chelates
(d) Alkali metals have high melting point

(Ans is from chat gpt)

A

Alkali metals have low melting point

35
Q

From Bettleheim: What is the product when ethanol is reacted with potassium dichromate?

A

Acetic Acid

36
Q

From Bettleheim: Question about diabetes. What is an indication that a person is diabetic?

A

The odor of acetone is responsible for the characteristic “sweet smell” on breath of severely diabetic patients.

37
Q

From Bettleheim: What is the product of the reaction when a-amylase acts on amylose?
Typo: Should be amylose instead of amylase

A

oligosaccharides.

38
Q

From Bettleheim: How many moles of lactate are produced from 3 moles of glucose?

A

6

39
Q

What happens to fugacity as mole fraction increases?

A

increases

40
Q

Which of the following is a secondary structure breaker/alpha helix terminator?
(a) Pro
(b) Glu, Leu
(c) Phe
(d) Cys, Ser

A

Proline

41
Q

From Bettleheim: What are the products of the activation of adenosine
triphosphate (ATP) with adenylate cyclase?

A

Cyclic Adenosine
Monophosphate (cAMP)
and Pyrophosphate

42
Q

From Bettleheim: What is the role of Ca^2+ in releasing neurotransmitters into the synapse?

A

The concentration of Ca^2+ in neurons controls the process. When it reaches 10^-4 M, the vesicles release the neurotransmitters into the synapse.

43
Q

Which block in the periodic table contains most elements?
(a) s-block (b) p-block (c) d-block (d) f-block

(Ans is from questionai)

A

p block

44
Q

What are the common
products of hydrolytic enzymes?
(a) methanol and cathecol (b) glucose and fructose

(ans is from chatgpt)

A

glucose and fructose

45
Q

In which case is the vapor pressure slightly higher than the atmospheric pressure?
(a) at melting point
(b) at boiling point
(c) at absolute zero
(d) at vacuum

(ans is from chatgpt)

A

at boiling point

46
Q

Where can the purest gold be found?
(a) living things
(b) water
(c) earth
(d) atmosphere

(ans is from chatgpt)

A

earth

47
Q

Which of the following statements best describe gases?

A

Gases do not have fixed shape and fixed volume.

48
Q

Which of the following is true for solid/liquid substances at
their melting points?
(a) ΔG = 0
(b) ΔH = 0
(c) ΔS = 0
(d) both ΔH and ΔS = 0

A

NA

49
Q

Which among the following is the easiest when diluting a
tequila to 1×10^(-12)?
(a) 1 ml tequila in 4166 mL water
(b) 1 mL tequila in 1000 mL water
(c) 10 mL tequila in 100 mL water
(d) forgot

A

NA

50
Q

What is Ozonolysis?

A

Is an organic reaction in which a carbon-carbon double or triple bond is cleaved when an alkene reacts with ozone (O3).

51
Q

Which of the following carbon-containing compounds is NOT obtained from living things and fossil fuels million years ago?

(a) methane, CO2, ethane
(b) paper, bagasse

A

NA

52
Q

An ore contains 50.5% of a certain compound (forgot exact name of compound). How much of this compound are there in 9000 kg of ore?

A

4545 kg

53
Q

If aspirin is made using raw materials salicylic acid and acetic anhydride with a yield of 75%, how many grams of aspirin will be produced?

(a) 25
(b) 30
(c) 15
(d) 10

A

25

54
Q

In the study of fats and lipids, determine which of the two triglycerides has a higher melting point, Substance A - containing only lauric acid and glycerol, or Substance B - containing only stearic acid and glycerol?

(a) B
(b) A
(c) both have same melting pt
(d) none

A

B

55
Q

Choose the process/es that occur/s with a decrease in entropy.
(a) freezing of water
(b) boiling of water
(c) dissolving salt in water
(d) sublimation of dry ice

A

freezing of water

56
Q

A certain solid compound was tested in a laboratory and was analyzed to contain 6.5% hydrogen, 42.2% carbon, and 5.5% oxygen, with a molecular weight of approx. 341.2. Determine the chemical formula.
(a) C10H14O16
(b) C12H12O11
(c) C6H12O6
(d) C11H18O22

A

C12H12O11

D1 (3 decks)

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