Ludwig Review 3 Q Questions From Jan 2017 Question Preview (ID: 36899)


Ludwig #3.

Carbon monoxide and carbon dioxide have
a) the same chemical properties and the same physical properties
b) the same chemical properties and different physical properties
c) different chemical properties and the same physical properties
d) different chemical properties and different physical properties

How many joules of heat are absorbed to raise the temperature of 10 grams of water at 1 atm from 25°C to 35.°C?
a) (1) 4.18
b) (2) 41.8
c) (3) 418
d) (4) 4180

Which change in the H+ ion concentration of an aqueous solution represents a decrease of one unit on the pH scale?
a) (1) a hundredfold increase
b) (2) a tenfold decrease
c) (3) a tenfold increase
d) (4) a hundredfold decrease

The stability of an isotope is related to its ratio of
a) neutrons to positrons
b) neutrons to protons
c) electrons to positrons
d) electrons to neutrons

The energy released during a nuclear reaction is a
a) breaking chemical bonds
b) forming chemical bonds
c) mass being converted to energy
d) energy being converted to mass

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity?(difference in electronnegitivity)
a) carbon
b) nitrogen
c) fluorine
d) oxygen

Based on Table F, which compound is least soluble in water?
a) (1) AlPO4
b) (2) Li2SO4
c) (3) Ca(OH)2
d) 4) AgC2H3O2

What is the chemical name for Na2SO3?
a) (1) sodium sulfite
b) (2) sodium sulfate
c) (3) sodium sulfide
d) (4) sodium thiosulfate

Which term is defined as a measure of the randomness of a
a) (1) heat
b) (2) entropy
c) (3) pressure
d) (4) temperature

Which general trends in atomic radius and electronegativity are observed as the elements in Period 3 are considered in order of increasing atomic number?
a) Atomic radius decreases and electronegativity increases.
b) Atomic radius increases and electronegativity decreases
c) Both atomic radius and electronegativity increase
d) Both atomic radius and electronegativity decrease.

Which sample of matter represents a mixture?
a) (1) aqueous ammonia
b) (2) gaseous ethane
c) (3) liquid mercury
d) (4) solid iodine

Which term represents an intermolecular force in a sample of water
a) (1) hydrogen bonding
b) (2) covalent bonding
c) (3) metallic bonding
d) (4) ionic bonding

In a chemical reaction, a catalyst provides an alternate reaction pathway that
a) (1) decreases the concentration of the products
b) (2) increases the concentration of the reactants
c) (3) has a lower activation energy
d) (4) has a higher activation energy

9 A compound is a substance composed of two or more elements that are
a) (l) physically mixed in a fixed proportion
b) (2) physically mixed in a variable proportion
c) (3) chemically combined in a fixed proportion
d) (4) chemically combined in a variable proportion

How many pairs of electrons are shared between the nitrogen atoms in a molecule of N2
a) (1) 5
b) (2) 2
c) (3) 3
d) (4) 6

A molecule must be nonpolar if the molecule
a) (1) is linear
b) (2) is neutral
c) (3) has an Asymmetrical charge distribution
d) (4) has a symmetrical charge distribution

At STP, O2(g) and O3(g) have different properties because O3(g) has
a) (l) more dense nuclei than in O2(g)
b) (2) more protons per atom than in O2(g)
c) (3) molecules with a different structure than in O2(g
d) 4) molecules with fewer covalent bonds than in O2(g)

What is the charge of the nucleus of a copper atom ?
a) (1) +1
b) (2) +2
c) (3) +29
d) (4) +64

Which term identifies the most probable location of an electron in the wave-mechanical model of the atom?
a) (l) anode
b) (2) orbital
c) (3) nucleus
d) (4) cathode

Which group on the Periodic Table has two elements that exist as gases at STP?
a) (1) Group 1
b) (2) Group 2
c) (3) Group 16
d) (4) Group 17

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