Classification of Elements and Periodicity in Properties Test

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Classification of Elements and Periodicity in Properties Test - 64

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Weekly Quiz Competition

Question 1
1 / -0

The correct order of negative electron gain enthalpy is:

A
$$S < O$$

B
$$O < F$$

C
$$Cl < F$$

D
$$F < Br$$

Solution

Electron gain enthalpy generally increases in a period from left to right and decreases in a group on moving down.However member of III period elements have high electron gain enthalpy due to large size. Therefore negative electron gain enthalpy $$S < O$$ .
Question 2
1 / -0

In $$Cr$$, $$21^{st}$$ electron will enter in which orbital?

A
$$d_{xy}$$

B
$$d_{yz}$$

C
$$d_{zx}$$

D
Any of the above
Question 3
1 / -0

For the process,
$$X(g)+{ e }^{ - }\longrightarrow { X }^{ - }(g)\quad \quad \quad \triangle H=x$$
$${ X }^{ - }(g)\longrightarrow X(g)+{ e }^{ - }\quad \quad \quad \triangle H=y$$

A
Ionization energy of $$X^{-}(g)$$ is $$y$$

B
Electron affinity of X (g) is $$x$$

C
Electron affinity of X (g) is $$-y$$

D
All are correct statements
Question 4
1 / -0

The process requiring the absorption of energy is:

A
$$F\longrightarrow F^-$$

B
$$Cl\longrightarrow Cl^{-}$$

C
$$O\longrightarrow O^{2-}$$

D
$$H\longrightarrow H^{-}$$
Question 5
1 / -0

$$M_{(g)}+e^- \rightarrow M^{-}_{(g)}$$ ; $$\Delta H=-354\ kJ/mole $$ at $$300\ K$$, then the electron affinity value at $$0\ K$$ is:

A
$$-298\ kJ/mol$$

B
$$+298\ kJ/mol$$

C
$$+348\ kJ/mol$$

D
$$-348\ kJ/mol$$

Solution
Question 6
1 / -0

Which of the following atoms should have the highest $$1^{st}$$ electron affinity?

A
$$F$$

B
$$O$$

C
$$N$$

D
$$C$$

Solution
Question 7
1 / -0

Identify the least stable among the following:

A
$$Li^{-}$$

B
$$Be^{-}$$

C
$$B^{-}$$

D
$$C^{-}$$

E
$$Cl^{-}$$
Question 8
1 / -0

Which pair of elements has the same characteristic chemical properties?

A
$$Z=13, Z=22$$

B
$$Z=3, Z=11$$

C
$$Z=4, Z=24$$

D
$$Z=2, Z=4$$

Solution
Question 9
1 / -0

In which pair do both atoms have one electron only in an "s" orbital in their ground states?

A
$$Ca, Sc$$

B
$$Cu,Be$$

C
$$H,He$$

D
$$Li,Cr$$
Question 10
1 / -0

The electron affinities of B,C, N and O are in the order of _____________.

A
B < C < N < O

B
B< C < O > N

C
B< C > O > N

D
B > C < O < N

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Classification of Elements and Periodicity in Properties Test - 64

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Classification of Elements and Periodicity in Properties Test - 64

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SHARING IS CARING

Question 1

$$S < O$$

$$O < F$$

$$Cl < F$$

$$F < Br$$

Solution

Question 2

$$d_{xy}$$

$$d_{yz}$$

$$d_{zx}$$

Any of the above

Question 3

Ionization energy of $$X^{-}(g)$$ is $$y$$

Electron affinity of X (g) is $$x$$

Electron affinity of X (g) is $$-y$$

All are correct statements

Question 4

$$F\longrightarrow F^-$$

$$Cl\longrightarrow Cl^{-}$$

$$O\longrightarrow O^{2-}$$

$$H\longrightarrow H^{-}$$

Question 5

$$-298\ kJ/mol$$

$$+298\ kJ/mol$$

$$+348\ kJ/mol$$

$$-348\ kJ/mol$$

Solution

Question 6

$$F$$

$$O$$

$$N$$

$$C$$

Solution

Question 7

$$Li^{-}$$

$$Be^{-}$$

$$B^{-}$$

$$C^{-}$$

$$Cl^{-}$$

Question 8

$$Z=13, Z=22$$

$$Z=3, Z=11$$

$$Z=4, Z=24$$

$$Z=2, Z=4$$

Solution

Question 9

$$Ca, Sc$$

$$Cu,Be$$

$$H,He$$

$$Li,Cr$$

Question 10

B < C < N < O

B< C < O > N

B< C > O > N

B > C < O < N

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