12 வேதியியல் அலகு-3 P- பிரிவு தனிமங்கள் - II

1. மிகவும் லேசான, எரியாத தனிமம் எது?

He

H2

N2

Ar

not-available-via-ai

Explanation

not-available-via-ai

2. ஒரு வரைபடத்தை கண்ளாடியில் எதன் உதவியுடன் வரைய முடியும் ?

HI

HF

HBr

HCl

not-available-via-ai

Explanation

not-available-via-ai

3. உயரிய வாயுக்களுக்கு வினைபுரியும் திறன் குறைவு,, ஏனெனில்

ஒரே எண்ணிக்கையுள்ள எலக்ட்ரான்களை கொண்டுள்ளது

அணுக்கட்டு எண் ஒன்று

குறைந்த அடர்த்தி உடைய வாயுக்கள்

நிலைத்த எலக்ட்ரான் அமைப்பை பெற்றுள்ள

The explanation for the correct answer is that the given statement states that the electrons in high energy levels have the ability to obtain a stable electron configuration by gaining or losing electrons. This implies that the electrons in higher energy levels are more likely to be involved in chemical reactions and bonding, as they have the capability to form stable electron arrangements by either gaining or losing electrons.

Explanation

The explanation for the correct answer is that the given statement states that the electrons in high energy levels have the ability to obtain a stable electron configuration by gaining or losing electrons. This implies that the electrons in higher energy levels are more likely to be involved in chemical reactions and bonding, as they have the capability to form stable electron arrangements by either gaining or losing electrons.

4. பின்வருவனவற்றுள் எவை அதிகமாக புவியில் கிடைக்கின்றது ?

C

Si

Ge

Sn

not-available-via-ai

Explanation

not-available-via-ai

5. PCl5 ன் வடிவம் யாது ?

பிரமிடு

முக்கோண இரு பிரமிடு

நேர்கோட்டு வடிவம்

நான்முகி

The correct answer is "முக்கோண இரு பிரமிடு" which translates to "Two-dimensional pyramid" in English. This suggests that PCl5 has a trigonal bipyramidal molecular geometry, where the central phosphorus atom is surrounded by five chlorine atoms. The trigonal bipyramidal geometry consists of two triangular faces and three axial positions, giving it the shape of a pyramid with a triangular base.

Explanation

The correct answer is "முக்கோண இரு பிரமிடு" which translates to "Two-dimensional pyramid" in English. This suggests that PCl5 has a trigonal bipyramidal molecular geometry, where the central phosphorus atom is surrounded by five chlorine atoms. The trigonal bipyramidal geometry consists of two triangular faces and three axial positions, giving it the shape of a pyramid with a triangular base.

6. ஹேலஜன்களின் தொகுதி என்ன?

14

15

17

18

The given question is asking for the group or category that "ஹேலஜன்கள்" belongs to. Since the options provided are numbers, it can be inferred that the question is asking for a numerical value. Among the given options, the number 17 is the only one that matches this criteria. Therefore, the correct answer is 17.

Explanation

The given question is asking for the group or category that "ஹேலஜன்கள்" belongs to. Since the options provided are numbers, it can be inferred that the question is asking for a numerical value. Among the given options, the number 17 is the only one that matches this criteria. Therefore, the correct answer is 17.

7. பின்வருவனவற்றுள் எத்தனிமம் 13 வது தொகுதியை சேர்ந்தது அல்ல ?

B

Al

Ge

In

The given question is asking for the 13th term in a series. The options provided are B, Al, Ge, and In. The correct answer is Ge, which is the 13th term in the series.

Explanation

The given question is asking for the 13th term in a series. The options provided are B, Al, Ge, and In. The correct answer is Ge, which is the 13th term in the series.

8. ஹேலஜன் அமிலத்ததில் வலிமை குறைந்து எது ?

HF

HCl

HBr

HI

HF has the least strength among the given options in terms of acidity. This is because HF is a weak acid compared to the other options. The strength of an acid is determined by its ability to donate a proton (H+) in a solution. HF is a weak acid because it only partially dissociates in water, resulting in fewer H+ ions being released compared to the other options. Therefore, HF has the least acidity or strength among the given options.

Explanation

HF has the least strength among the given options in terms of acidity. This is because HF is a weak acid compared to the other options. The strength of an acid is determined by its ability to donate a proton (H+) in a solution. HF is a weak acid because it only partially dissociates in water, resulting in fewer H+ ions being released compared to the other options. Therefore, HF has the least acidity or strength among the given options.

9. கீழ்கண்டவற்றுள் எது மிக அதிக முதல் அயனியாக்கும் ஆற்றலை கொண்டுள்ளது ?

He

Ne

Ar

Kr

not-available-via-ai

Explanation

not-available-via-ai

10. புகைத்திரையில் பயன்படுத்தப்படும் சேர்மம் எது ?

PCl3

PCl5

PH3

H3PO3

The correct answer is PH3. In the given question, we are asked to identify the compound commonly used in photography. Among the options provided, PH3 (phosphine) is the compound that is commonly used in photography. PCl3 and PCl5 are not commonly used in photography but are used in other chemical reactions. H3PO3 (phosphorous acid) is not commonly used in photography either. Therefore, the correct answer is PH3.

Explanation

The correct answer is PH3. In the given question, we are asked to identify the compound commonly used in photography. Among the options provided, PH3 (phosphine) is the compound that is commonly used in photography. PCl3 and PCl5 are not commonly used in photography but are used in other chemical reactions. H3PO3 (phosphorous acid) is not commonly used in photography either. Therefore, the correct answer is PH3.

11. XeF4 – வடிவம்

நான்முகி

எண்முகி

தள சதுரம்

பிரமிடு

not-available-via-ai

Explanation

not-available-via-ai

12. கீழ்க்கண்டவற்றில் எது சாத்தியமற்றது ?

XeF6

XeF4

XeO3

ArF6

not-available-via-ai

Explanation

not-available-via-ai

13. ஒரு தனிமம் அளந்தறியப்பட்ட ஆக்ஸினுடன் எரிந்து A என்ற ஆக்சைடைத் தருகிறது. A நீருடன் வினைபுரிந்து B என்ற அமிலத்தை தருகிறது. B யை வெப்பப்படுத்தினால் C என்ற அமிலத்தை தருகிறது. C சில்வர் நைட்ரேட்டுடன் மஞ்சள் நிற வீழ்படிவைத் தருகிறது A என்பது

SO2

NO2

P2O3

SO3

not-available-via-ai

Explanation

not-available-via-ai

14. எது -1 ஆக்ஸிஜனேற்ற நிலையில் மட்டும் உள்ளது ?

F

Br

Cl

I

The element F (fluorine) is the only element that exists as a gas at room temperature and atmospheric pressure. All the other elements listed (Br, Cl, I) exist as liquids or solids at room temperature and atmospheric pressure.

Explanation

The element F (fluorine) is the only element that exists as a gas at room temperature and atmospheric pressure. All the other elements listed (Br, Cl, I) exist as liquids or solids at room temperature and atmospheric pressure.

15. உள்ளிப் பூண்டின் மணமுடைய சேர்மம் எது ?

P2O3

P2O5

H3PO3

H3PO4

The correct answer is P2O3. P2O3 is a compound that contains two atoms of phosphorus and three atoms of oxygen. The prefix "di" in the formula indicates that there are two atoms of phosphorus. The subscript "3" indicates that there are three atoms of oxygen. This compound is formed by the combination of phosphorus and oxygen atoms.

Explanation

The correct answer is P2O3. P2O3 is a compound that contains two atoms of phosphorus and three atoms of oxygen. The prefix "di" in the formula indicates that there are two atoms of phosphorus. The subscript "3" indicates that there are three atoms of oxygen. This compound is formed by the combination of phosphorus and oxygen atoms.