STD 8_sem Ii_chapter 2

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
Learn about Our Editorial Process
| By Asgarali429
A
Asgarali429
Community Contributor
Quizzes Created: 2 | Total Attempts: 469
Questions: 10 | Attempts: 74

SettingsSettingsSettings
STD 8_sem Ii_chapter 2 - Quiz

Questions and Answers
  • 1. 

    તત્વનો પાયાનો મૂળભૂત ઘટક કયો છે

    • A.

      પરમાણું

    • B.

      અણુ

    • C.

      આયન

    • D.

      સંયોજન

    Correct Answer
    A. પરમાણું
    Explanation
    The correct answer is "પરમાણું". This is because a "પરમાણું" or an atom is the fundamental building block of matter. It is the smallest unit of an element that retains the chemical properties of that element. Atoms combine to form molecules and compounds, which then make up all the substances we see around us. Therefore, the atom is considered the basic component of matter.

    Rate this question:

  • 2. 

    પરમાણ્વીય કેન્દ્રમાં કયા કણો આવેલા હોતા  નથી

    • A.

      ન્યુટ્રોન

    • B.

      પ્રોટોન

    • C.

      ઈલેક્ટ્રોન

    • D.

      એકપણ નહીં

    Correct Answer
    C. ઈલેક્ટ્રોન
    Explanation
    Electrons are not present in the atomic nucleus. They are found outside the nucleus in the electron cloud. Protons and neutrons are the particles that are present in the atomic nucleus. Therefore, the correct answer is "Electron".

    Rate this question:

  • 3. 

    કયા કણોવીજભાર  ધરાવતા  નથી

    • A.

      પ્રોટોન

    • B.

      ન્યુટ્રોન

    • C.

      ઈલેક્ટ્રોન

    • D.

      એકપણ નહી

    Correct Answer
    B. ન્યુટ્રોન
  • 4. 

    સોડિયમના  પરમાણુની  ઈલેક્ટ્રોનીય  રચના  શી છે

    • A.

      2,8

    • B.

      2,8,1

    • C.

      2,8,2

    • D.

      2,8,7

    Correct Answer
    B. 2,8,1
    Explanation
    The electronic configuration of sodium is 2,8,1. This means that sodium has 11 electrons in total, with 2 electrons in the first energy level, 8 electrons in the second energy level, and 1 electron in the third energy level. The electronic configuration represents the arrangement of electrons in the different energy levels or shells around the nucleus of an atom. In the case of sodium, the first energy level can hold a maximum of 2 electrons, the second energy level can hold a maximum of 8 electrons, and the third energy level can hold a maximum of 8 electrons. Therefore, the correct electronic configuration for sodium is 2,8,1.

    Rate this question:

  • 5. 

    મેગ્નેશીયમ સંયોજકતા કેટલી છે

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    Correct Answer
    B. 2
  • 6. 

    એલ્યુમીનીયમની  સંયોજકતા કેટલી છે    

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    Correct Answer
    C. 3
  • 7. 

        સંયોજનનો પાયાનો એકમ કયો છે

    • A.

      અણુ

    • B.

      પરમાણુ

    • C.

      આયન

    • D.

      સંયોજન

    Correct Answer
    A. અણુ
    Explanation
    The correct answer is "અણુ" (Atom). In the given options, "અણુ" is the only term that refers to an individual unit or particle. The other options, "પરમાણુ" (Element), "આયન" (Ion), and "સંયોજન" (Compound), refer to larger entities composed of multiple atoms. Therefore, "અણુ" is the correct answer as it represents the smallest unit of a chemical element.

    Rate this question:

  • 8. 

    ક્લોરીન  પરમાણુંની  બાહ્યતમ કક્ષામાં  કેટલા  ઈલેક્ટ્રોન હોય છે

    • A.

      1

    • B.

      3

    • C.

      5

    • D.

      7

    Correct Answer
    D. 7
  • 9. 

    પ્રોટોન કયો  વીજભાર  ધરાવે  છે  

    • A.

      ધન

    • B.

      ઋણ

    • C.

      આયન

    • D.

      સંયોજન

    Correct Answer
    A. ધન
  • 10. 

         મીઠાનું  રાસાયણિક  સૂત્ર  જણાવો

    • A.

      Na2Cl

    • B.

      NaCl

    • C.

      NaNO2

    • D.

      MgCl2

    Correct Answer
    B. NaCl
    Explanation
    The correct answer is NaCl because NaCl is the chemical formula for common table salt, which is a compound made up of sodium (Na) and chlorine (Cl) ions. The other options, Na2Cl, NaNO2, and MgCl2, do not represent a known compound or do not match the given chemical formula.

    Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 16, 2014
    Quiz Created by
    Asgarali429
Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.