Tag: chemistry

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Questions Related to chemistry

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

________ element has one electron in the outermost shell and attains duplet configuration after accepting one more electron and attains stability.

  1. Helium

  2. Hydrogen

  3. Lithium

  4. Carbon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen has ${ 1e }^{ - }$ in outermost shell, in order to achieve stability either ${ e }^{ - }$ to be removed or added. When added it acquires a stable configuration forming duplet.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

Hydrogen is the ________ element on the earth.

  1. most abundant

  2. heaviest

  3. lightest

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$H$ is the lightest element on earth as there is only $1$ proton and ${ 1e }^{ - }$. All the other elements have more than 1 electrons and protons along with neutrons.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

Assertion (A): Hydrogen shows resemblance with alkali metals as well as halogens.
Reason (R): Hydrogen exists in atomic form only at high temperature.

  1. Both A and R are true and R is the correct explanation of A

  2. Both A and R are true but R is not a correct explanation of A

  3. A is true but R is false

  4. A is false but R is true
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen is having similarities with alkali metals and halogens any many properties and hydrogen exists In atomic form in high temperature but the reason not satisfy the assertion so assertion and reason are true.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

In which of the following properties listed below, hydrogen does not show similarity with halogens?

  1. Nature of the oxide

  2. Electropositive character

  3. Combination with alkali metals

  4. Atomicity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Halogens are highly electronegative and form anions, whereas hydrogen can form both H+ and H- but is generally considered to have a different electropositive character than halogens.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

In which property listed below hydrogen does not resemble alkali metals?

  1. Tendency to form cation

  2. Nature of oxide

  3. Combination with halogens

  4. Reducing character
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen shows all other properties like alkali metals (form cation, combine with halogens, reducing nature) but nature of oxide is different than metals.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

The characteristics of hydrogen resemble the elements of__as well as__groups.

  1. IIA and VA

  2. IIIA and VIA

  3. IIA and VIA

  4. IA and VIIA
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Because hydrogen has ${ 1e }^{ - }$ in its outermost shell which is ready to be donated like that a group $1A$ (alkali metals). Also hydrogen can accept an ${ e }^{ - }$ to from ${ H }^{ - }$ having ${ 2e }^{ - }$ in outer shell which is stable this resembles to $VIIA$ group (Halogen family), as they also require only one ${ e }^{ - }$ to fulfill their incomplete octet.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

In all its properties, hydrogen resembles:

  1. alkali metals only

  2. halogens only

  3. both alkali metals and halogens

  4. neither alkali metals nor halogens
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydrogen resembles alkali metals and halogens in all its properties. The electronic configuration of hydrogen, alkali metals and halogens are $1s^1,  ns^1$ and $ns^2, np^3$ respectively. All are short by one electron from noble gas configuration. Hence, all have similar chemical properties.

Multiple choice chemistry study of the first element - hydrogen position of hydrogen in the periodic table hydrogen in periodic table trends in groups and periods

Hydrogen loses its electron to form $H^+$. In this respect, it resembles:

  1. halogens

  2. alkali metals

  3. transition element

  4. alkaline earth metals
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Alkali metals have one electron present in their outer shell in group I so after losing one electron they become stable ions similarly hydrogen has lone electron in its shell after losing it shares the same character as alkali metal group.