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Chemistry > Group 15 > Flashcards

Group 15 Flashcards

1
Q

P block includes group __ to group ___

A

13 to 18

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2
Q

Valance shell configuration

A

ns² np¹-⁶

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3
Q

Nitrogen found in plants and animals as

A

Proteins

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4
Q

Nitrogen occurs as _______ and ______ called as ___petre and ___ petre respectively

A

Sodium nitrate and potassium nitrate
Chile and Indian

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5
Q

What is the chemical formula for sodium nitrate?

A

NaNO3

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6
Q

What percentage of the atmosphere is comprised of molecular nitrogen?

A

78%

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7
Q

Which elements are typical metals in Group 115?

A

Bismuth and moscovium

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8
Q

What type of elements are Nitrogen phosphorus, arsenic, and antimony?

A

Non-metals and metalloids

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9
Q

What character shift occurs as you go down

A

From non-metallic to metallic through metalloidic character

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10
Q

Fill in the blank: Molecular nitrogen comprises _______ of the atmosphere.

A

78%

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11
Q

What is the chemical formula of the apatite family?
Flouroapatite formula

A

Ca9(PO4)⁶.CaX², where X = F, Cl, or OH

Ca9(PO⁴)⁶ .CaF²

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12
Q

Why is phosphorus considered essential?

A

It is an essential constituent of animal and plant matter, present in bones and living cells.

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13
Q

Where are phosphoproteins commonly found?

A

In milk and eggs.

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14
Q

What minerals are arsenic, antimony, and bismuth mainly found as?

A

Sulphide minerals.

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15
Q

True or False: Moscovium has a long half-life and is abundantly available.

A

False.

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16
Q

What is the chemical formula of the apatite family?

A

Ca5(PO4)3X, where X = F, Cl, or OH

Examples include fluorapatite (Ca5(PO4)3F), which are the main components of phosphate rocks.

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17
Q

Why is phosphorus considered essential?

A

It is an essential constituent of animal and plant matter, present in bones and living cells.

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18
Q

What is the group number for ns²np³ elements?

A

Group 15

This group includes nitrogen, phosphorus, arsenic, antimony, and bismuth.

19
Q

What type of elements are found in Group 15?

A

Non-metal, metalloid

Group 15 contains both non-metals (like nitrogen) and metalloids (like arsenic).

20
Q

How does metallic character change in Group 15?

A

Metallic character increases

This trend is observed as you move down the group from nitrogen to bismuth.

21
Q

Arrange the following elements based on atomic radius from smallest to largest: N, P, As, Sb, Bi

A

N < P < As < Sb < Bi

Atomic radius increases down the group.

22
Q

What is the order of electronegativity (E.N) in Group 15 elements?

A

N > P > As > Sb > Bi

Nitrogen has the highest electronegativity, while bismuth has the lowest.

23
Q

What is the boiling point trend in Group 15?

A

N > P < As< Bi< Sb

Boiling points increase down the group.

24
Q

What is the melting point trend in Group 15?

A

N < P < As > Sb > Bi

Melting points increase Upto As then decrease upto bismuth

25
Q

Which element in Group 15 has a tendency to form -3 oxidation states?

A

N > P > As > Sb > Bi

This trend indicates the preference for gaining three electrons.

26
Q

Which element in Group 15 has a tendency to form +5 oxidation states?

A

N > P > As > Sb > Bi

Nitrogen is the most likely to form +5 oxidation states.

27
Q

What is the anomalous behavior of nitrogen attributed to?

A

Small size, high ionization energy, high electronegativity, absence of d-orbital

These factors contribute to nitrogen’s unique chemical properties.

28
Q

Which hydride is the most stable among NH₃, PH₃, AsH₃, SbH₃, and BiH₃?

A

NH₃ > PH₃ > AsH₃ > SbH₃ > BiH₃

Stability decreases down the group.

29
Q

Fill in the blank: The reducing character of the hydrides follows the trend ______.

A

NH₃ < PH₃ < AsH₃ < SbH₃ < BiH₃

This indicates that ammonia is the least reducing while bismuth hydride is the most.

30
Q

What is the basic nature trend in Group 15 hydrides?

A

NH₃ > PH₃ > AsH₃ > SbH₃ > BiH₃

NH3 is mots basic and BH3 most acidic

31
Q

What is the reactivity trend of Group 15 elements with oxygen?

A

E + O₂ → E₂O₃

This reaction demonstrates the formation of oxides with oxygen.

32
Q

How does metallic character change in Group 15?

A

Metallic character increases

This trend is observed as you move down the group from nitrogen to bismuth.

33
Q

Arrange the following elements based on atomic radius from smallest to largest: N, P, As, Sb, Bi

A

N < P < As < Sb < Bi

Atomic radius increases down the group.

34
Q

What is the boiling point trend in Group 15?

A

N < P< As< Bi< Sb

35
Q

What is the melting point trend in Group 15?

A

N < P < As > Sb > Bi

Melting points vary, with nitrogen having the lowest and arsenic and antimony having higher melting points.

36
Q

Which element in Group 15 has a tendency to form -3 oxidation states?

A

N > P > As > Sb > Bi

This trend indicates the preference for gaining three electrons.

37
Q

Which element in Group 15 has a tendency to form +5 oxidation states?

A

N > P > As > Sb > Bi

Nitrogen is the most likely to form +5 oxidation states.

38
Q

Does nitrogen show allotropy?

A

No

Nitrogen does not exhibit allotropy like some other elements.

39
Q

What is the anomalous behavior of nitrogen attributed to?

A

Small size, high ionization energy, high electronegativity, absence of d-orbital

These factors contribute to nitrogen’s unique chemical properties.

40
Q

What is the bond enthalpy of the N-N bond compared to P-P

A

N-N < P-P

Nitrogen- Nitrogen bond weaker than P-P because of high inter electronic replusion of non bonding electrons
Owing to small bond length as result week catenations tendency in N

41
Q

Which hydride is the most stable among NH₃, PH₃, AsH₃, SbH₃, and BiH₃?

A

NH₃ > PH₃ > AsH₃ > SbH₃ > BiH₃

Stability decreases down the group.

42
Q

Fill in the blank: The reducing character of the hydrides follows the trend ______.

A

NH₃ < PH₃ < AsH₃ < SbH₃ < BiH₃

This indicates that ammonia is the least reducing while bismuth hydride is the most.

43
Q

What is the reactivity trend of Group 15 elements with oxygen?

A

E + O₂ → E₂O₃

This reaction demonstrates the formation of oxides with oxygen.

44
Q

Tendency to form +3 ox state

A

N+³<P+³<As+³<Sb+³<Bi+³

Chemistry (10 decks)

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