Classification of Elements and Periodicity in Properties Test

Result

Classification of Elements and Periodicity in Properties Test - 31

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Argon in period-3 is likely to have a larger atomic size than chlorine and its electron affinity value would be _______compared to chlorine.

A
greater

B
lesser

C
zero

D
none of these

Solution

Due to complete octet, argon in period-3 is likely to have a larger atomic size than chlorine and its electronaffinity value would be zero compared to chlorine.
Question 2
1 / -0

Atom with ____atomic radii and ___ionisation potential tends to gain electrons

A
large , high

B
large , low

C
small , low

D
small , high

Solution

Ionization energies increase moving from left to right across a period (decreasing atomic radius).
So, atom with small atomic radii and high ionisation potential tends to gain electrons.
Question 3
1 / -0

Electronic configuration of Mg is:

A
$$1s^2 2s^1p^5 3s^23d^2$$

B
$$1s^2 2s^2p^6 3s^2$$

C
$$1s^2 2s^2p^7 3s^1$$

D
$$1s^2 2s^2p^6 3s^2p^2$$

Solution

Electronic configuration of Mg is $$[Ne]3s^2$$
Ne is $$1s^22s^2p^6$$ .
Question 4
1 / -0

The formula of the hydroxide of the element having electronic configuration 2, 8, 2 is :

A
$$MgOH$$

B
$$Mg(OH)_3$$

C
$$Mg_2(OH)_3$$

D
$$Mg(OH)_2$$

Solution

Element having electronic configuration 2, 8, 2 is Mg and it forms hydroxide as $$Mg(OH)_2$$.
Question 5
1 / -0

The character of the hydroxide of the element $$Al$$:

A
acidic

B
basic

C
neutral

D
amphoteric

Solution

Period 3, group 13 element $$Al$$ is a metal so it forms hydroxide as $$Al(OH)_3$$ which has both acidic and basic properties.

Question 6

1 / -0

Directions For Questions

Using the information below about element $$X$$ and $$Y$$, complete the following questions:

$$X:\ \ 2, 8, 7$$	$$Y: \ \ 2, 8, 2$$
Dissolves in water & turns blue litmus red	Very low solubility in water. Dissolves in $$HCl$$
Tends to oxidise elements and compounds	Tends to act as a reducing agent
Poor electrical & thermal conductivity	Good electrical & thermal conductivity
No tendency to form alloys	Forms alloys

...view full instructions

Which is the metallic element?

$$Y$$

$$X$$

Both $$A$$ and $$B$$

None of the above

Solution

$$Y: \ \ 2, 8, 2$$ is a metallic element as it has a tendency to loose an electron and get stable octet configuration.

Question 7
1 / -0

Compare the properties of a typical metal and a non-metal on the basis of the following.

Electronic configuration :

A
Metal have 1, 2, 3, 4 valence electrons while non metals have 5, 6, 7, 8 valence electrons.

B
Metal have 1, 2 valence electrons while non metals have 4, 5, 6, 7, 8 valence electrons.

C
Metal have 1, 2, 3 valence electrons while non metals have 6, 7, 8 valence electrons.

D
Metal have 1, 2, 3 valence electrons while non metals have 4, 5, 6, 7 valence electrons.

Solution

$$\begin{array}{l}\text { Metals have } 1,2,3 \text { valence electrons because } \text { they can Loose either of these electrons to } \\\text { gain octet configuration. } \text { Wheras Non metals can gain remaining electrons } \\\text { to get octet configuration. }\end{array}$$
Hence, option D is correct.
Question 8
1 / -0

Match column I with column II and select the correct answer using the codes given below:
Column I Column II
(A) $$_{ 6 }^{ 14 }{ C }$$ and $$_{ 6 }^{ 13 }{ C }$$ (p) Different number of neutrons
(B) $$_{ 20 }^{ 40 }{ C a}$$ and $$_{ 18 }^{ 40 }{ Ar }$$ (q) Different number of protons and neutrons
(C) $$K \left(19\right)$$ (r) Non-metal
(D) Chlorine $$\left(17\right)$$ (s) Metal

A
A - (p); B - (q); C - (r); D - (s)

B
A - (q); B - (p); C - (s); D - (r)

C
A - (p); B - (q); C - (s); D - (r)

D
A - (p); B - (s); C - (q); D - (r)

Solution

a) Isotopes have different numbers of neutrons.
b) Isobars differ in the number of protons and neutrons but mass number is same.
c) Potassium is a metal.
d) Chlorine is a non-metal.

Hence, it is $$A \rightarrow (p); B \rightarrow (q); C \rightarrow (s); D \rightarrow (r)$$
Question 9
1 / -0

Which of the following element has highest electron-gain enthalpy?

A
Oxygen

B
Fluorine

C
Chlorine

D
Neon

Solution

Halogens have the highest electron gain enthalpy (electron affinity). Normally electron affinity decreases as we move down the group. However, fluorine has a lower value than chlorine which is due to its small size. Hence, chlorine has the highest electron gain enthalpy.

Hence, the correct option is $$\text{C}$$
Question 10
1 / -0

Compare the properties of metals and non-metals with respect to electronic configuration.

A
Metals have 1,2 valence electrons while non metals have 3,5,6 or 7 valence electrons

B
Metals have 1 or 3 valence electrons while non metals have 2,5 valence electrons

C
Metals have 2 or 3 valence electrons while non metals have 1,5,6 or 7 valence electrons

D
Metals have 1,2 or 3 valence electrons while non metals have 4,5,6 or 7 valence electrons

Solution

Metals have 1,2 or 3 valence electron while non metals have 4,5,6 or 7 valence electron.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Classification of Elements and Periodicity in Properties Test - 31

Result

Classification of Elements and Periodicity in Properties Test - 31

Score

-

Rank

-

SHARING IS CARING

Question 1

greater

lesser

zero

none of these

Solution

Question 2

large , high

large , low

small , low

small , high

Solution

Question 3

$$1s^2 2s^1p^5 3s^23d^2$$

$$1s^2 2s^2p^6 3s^2$$

$$1s^2 2s^2p^7 3s^1$$

$$1s^2 2s^2p^6 3s^2p^2$$

Solution

Question 4

$$MgOH$$

$$Mg(OH)_3$$

$$Mg_2(OH)_3$$

$$Mg(OH)_2$$

Solution

Question 5

acidic

basic

neutral

amphoteric

Solution

Question 6

$$Y$$

$$X$$

Both $$A$$ and $$B$$

None of the above

Solution

Question 7

Metal have 1, 2, 3, 4 valence electrons while non metals have 5, 6, 7, 8 valence electrons.

Metal have 1, 2 valence electrons while non metals have 4, 5, 6, 7, 8 valence electrons.

Metal have 1, 2, 3 valence electrons while non metals have 6, 7, 8 valence electrons.

Metal have 1, 2, 3 valence electrons while non metals have 4, 5, 6, 7 valence electrons.

Solution

Question 8

A - (p); B - (q); C - (r); D - (s)

A - (q); B - (p); C - (s); D - (r)

A - (p); B - (q); C - (s); D - (r)

A - (p); B - (s); C - (q); D - (r)

Solution

Question 9

Oxygen

Fluorine

Chlorine

Neon

Solution

Question 10

Metals have 1,2 valence electrons while non metals have 3,5,6 or 7 valence electrons

Metals have 1 or 3 valence electrons while non metals have 2,5 valence electrons

Metals have 2 or 3 valence electrons while non metals have 1,5,6 or 7 valence electrons

Metals have 1,2 or 3 valence electrons while non metals have 4,5,6 or 7 valence electrons

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.