Oct 2023 Flashcards by Aaa :D

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

Charle’s Law

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

Lucite

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Which layer of the atmosphere can the ozone be located?

Stratosphere

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

Electron

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In redox reactions, which property changes when oxidation
occurs?

Charge

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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

Scintillation counter and Geiger

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

By Ingestion: Dieldrin > Heptachlor > Arsenic > DDT > Chromium

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

False, they are colorless and water soluble.

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

(Answer is from chat gpt)

Farmer

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What is a buckyball?

fullerene

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What is the formula of buckyball?

C60

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What is the molecular weight of sucrose?

342 g/mol

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What is the molar mass of air?

29 g/mol

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Which of the following were discovered by Curie?

Radium and Polonium

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

alcohol

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What is the practical
application of Joule Thomson effect?

cooling

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Who initiated the development of periodic table?

Dmitri Mendeleev

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Who discovered photosynthesis?

Melvin Calvin

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Who discovered Theory of Valence?

Linus Pauling

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What is the composition of acid rain?

Nitric Acid and Sulfuric Acid

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A heterocyclic compound has a non-carbon member in the ring…. Which of the following is heterocyclic?
(a) cyclohexane & cycloheptane
(b) Acetic anhydride & butyric anhydride
(c) furan and pyran

furan and pyran

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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.
(chatgpt)

Selective Reduction, Mild Reaction Conditions, Non-Hydrogenating Nature, Avoidance of Metal Contaminants, Reactivity with Functional Groups, Environmentally Friendly

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

4, 0, 0

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

Elasticity

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?

CO2

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?

Decreases

This is used in titration to cause change of color.

Indicator

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)

Alkali metals have low melting point

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

Acetic Acid

From Bettleheim: Diabetic patients are found to have an increased ketone concentration in their bodies. What causes this?

Acetoacetic acid decarboxylates into acetone and CO2 , which causes the sweet smell on their breath

From Bettleheim: What is the product when alpha-amylase acts on amylase?

oligosaccharides

What happens to fugacity as mole fraction increases?

increases

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

Proline

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

Cyclic Adenosine Monophosphate (cAMP) and Pyrophosphate

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

An increase in calcium ion concentration may take the form of sparks or puffs.

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

d block

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

glucose and fructose

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)

at boiling point

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

earth

Which of the following statements best describe gases?

Gases do not have fixed shape and fixed volume.

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

ΔG = 0

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

1 ml tequila in 4166 mL water

What is Ozonolysis?

It is the reaction with ozone followed by reduction in the presence of Zinc and water

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

paper, bagasse Plastics (like polyethylene), Synthetic chemicals or biofuels (like ethanol from crops)

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?

4545 kg

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

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

containing stearic acid and glycerol

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

freezing of water

Which process uses air to convert harmful compounds in wastewater into less harmful and stable products?

Aeration

Which temperature scale is defined as a fraction of the triple point of water? a. Fahrenheit c. Kelvin b. Rankine d. Celsius

Kelvin

You are working in a site with strong beta particles. What material would you recommend for protection? a. Lead c. Paper b. Concrete d. Aluminum

Aluminum

Tell which of the following is true a) Alpha decay emits 2 protons and 2 neutrons b) Beta is more penetrating than alpha c) Negative beta decay loses a neutron d) Positive beta decay loses a proton

a) Alpha decay emits 2 protons and 2 neutrons b) Beta is more penetrating than alpha

Which of the following are true? a) Nuclear fusion produces radioactive product b) Nuclear fusion requires very high temperature to an order of 10 6 °C c) Nuclear fusion involves chain reaction d) Nuclear fusion releases more energy than fission

b) Nuclear fusion requires very high temperature to an order of 10 6 °C d) Nuclear fusion releases more energy than fission

Monosaccharides are colorless, crystalline solids, and are very soluble in water. True or false? and why?

True, because of their polar hydroxyl groups

What is the smallest unit that retains the physical properties? a. Atom c. Molecule b. Ion

Atom

What is the product of the oxidation of dopamine?

R-Epinephrine