Oct 2023 Flashcards
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
Statement regarding beta emission. Which material is best used for protection against beta emission?
(a) Aluminum
(b) lucite
(c) lead
(d) steel
Lucite
Which layer of the atmosphere can the ozone be located?
Stratosphere
Which subatomic particle carries/determines the chemical properties of an element?
Electron
In redox reactions, which property changes when oxidation
occurs?
Charge
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
Arrange the following based on level of toxicity: heptachlor, dieldrin, DDT, Arsenic, Cr
By Ingestion: Dieldrin > Heptachlor > Arsenic > DDT > Chromium
Monosaccharides have yellow appearance and are soluble in water. True or False?
False, they are colorless and water soluble.
Which sector uses the most of freshwater supply in United States?
(a) Industry
(b) Farmer
(c) Residential
(Answer is from chat gpt)
Farmer
What is a buckyball?
fullerene
What is the formula of buckyball?
C60
What is the molecular weight of sucrose?
342 g/mol
What is the molar mass of air?
29 g/mol
Which of the following were discovered by Curie?
Radium and Polonium
What is the product when alkyl halide is reacted with hydroxy group?
alcohol
What is the practical
application of Joule Thomson effect?
cooling
Who initiated the development of periodic table?
Dmitri Mendeleev
Who discovered photosynthesis?
Melvin Calvin
Who discovered Theory of Valence?
Linus Pauling
What is the composition of acid rain?
Nitric Acid and Sulfuric Acid
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
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
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
25
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
