Chemistry (UI) | Study Mode

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Question 11

In the oil drop experiment, Millikan determined the

charge to mass ratio of the electron

mass of the electron

charge of the electron

mass of the proton

Explanation

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Correct option: C

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Question 12

One of these atomic shells is the most stable

Explanation

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Correct option: C

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Question 13

Sieving is a technique used to separate mixtures containing 20% oxygen by volume. Which of the reactants was in excess?

Carbon (II) oxide

Oxygen

Carbon (IV) oxide

Nitrogen

Explanation

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Correct option: A

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Question 14

The abnormally high boiling point of water is primarily due to

ionic bonding

covalent bonding

dative bonding

coordinate covalent bonding

hydrogen bonding.

Explanation

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Correct option: E

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Question 15

The energy required to remove an electron from the isolated gaseous atom is known as

electron affinity

bond energy

lonisation energy

electronegativity

electrovalency.

Explanation

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Correct option: C

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Question 16

The group that oxygen belongs to is collectively called

allotropes

halogens

chalcogens

alkenes

ozonides.

Explanation

The chalcogens (/ˈkælkədʒɪnz/) are the chemical elements in group 16 of the periodic table. This group is also known as the oxygen family. It consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and the radioactive element polonium (Po).

Correct option: C

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Question 17

The ideal gas equation is ___

P=nRT

PR =nVT

PV =gRT

V=kT

PV = K V

Explanation

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Correct option: A

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Question 18

The number of atoms in one mole of a substance is equal to

the atomic number

the Avogadros number

number of neutrons

number of electrons

gas constant

Explanation

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Correct option: D

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Question 19

The number of electrons in the outermost shell of the atom represents its

period

number of shells

group

atomic number

electronegativity.

Explanation

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Correct option: C

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Question 20

The number of protons or electrons of an atom represents its

electronegativity

period

number of shells

group

atomic number

Explanation

Explanation not provided, please join discuss, your contributions are welcomed

Correct option: E

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