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- 2.
તત્વનો પાયાનો મૂળભૂત ઘટક કયો છે
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પરમાણું
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અણુ
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આયન
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સંયોજન
Correct Answer
A. પરમાણુંExplanation
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:
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- 3.
મેગ્નેશીયમ સંયોજકતા કેટલી છે
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1
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2
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3
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4
Correct Answer
A. 2 -
- 4.
ક્લોરીન પરમાણુંની બાહ્યતમ કક્ષામાં કેટલા ઈલેક્ટ્રોન હોય છે
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1
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3
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5
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7
Correct Answer
A. 7 -
- 5.
સંયોજનનો પાયાનો એકમ કયો છે
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અણુ
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પરમાણુ
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આયન
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સંયોજન
Correct Answer
A. અણુExplanation
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:
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- 6.
કયા કણોવીજભાર ધરાવતા નથી
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પ્રોટોન
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ન્યુટ્રોન
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ઈલેક્ટ્રોન
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એકપણ નહી
Correct Answer
A. ન્યુટ્રોન -
- 7.
મીઠાનું રાસાયણિક સૂત્ર જણાવો
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Na2Cl
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NaCl
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NaNO2
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MgCl2
Correct Answer
A. NaClExplanation
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:
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- 8.
પરમાણ્વીય કેન્દ્રમાં કયા કણો આવેલા હોતા નથી
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ન્યુટ્રોન
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પ્રોટોન
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ઈલેક્ટ્રોન
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એકપણ નહીં
Correct Answer
A. ઈલેક્ટ્રોનExplanation
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:
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- 9.
સોડિયમના પરમાણુની ઈલેક્ટ્રોનીય રચના શી છે
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2,8
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2,8,1
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2,8,2
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2,8,7
Correct Answer
A. 2,8,1Explanation
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:
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- 10.
એલ્યુમીનીયમની સંયોજકતા કેટલી છે
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1
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2
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3
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4
Correct Answer
A. 3 -
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Jul 22, 2024Quiz Edited by
ProProfs Editorial Team -
Dec 16, 2014Quiz Created by
Asgarali429
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