BASICS OF EVERY DAY SCIENCE EDS
Basics of Every Day Science EDS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
بانڈ جس میں 3 مشترکہ الیکٹران کے جوڑے شامل ہیں ایک ______ ہے؟
Double covalent bond
Single covalent bond
Triple covalent bond
None of above
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Explanation
A triple covalent bond is a chemical bond that involves the sharing of three pairs of electrons between two atoms.This type of bond is typically found in molecules where three pairs of electrons are shared, resulting in a strong and stable bond.
نوبل گیسیں مستحکم ہیں کیونکہ ان میں _____؟
4 electrons in valence shell
6 electrons in valence shell
8 electrons in valence shell
10 electrons in valence shell
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Explanation
Noble gases are stable because their outermost energy level is full, meaning they have eight electrons in their valence shell.This full outer energy level gives them a stable electronic configuration, similar to that of the noble gases, and makes them unreactive.
Covalent bond
Ionic bond
Coordinate covalent bond
Hydrogen bond
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Explanation
When one atom loses an electron to form a cation and another atom gains that electron to form an anion, the resulting attraction between the oppositely charged ions is an ionic bond. This type of bond is typically formed between a metal and a nonmetal, and is characterized by a transfer of electrons rather than a sharing of electrons (as in covalent bonds).
ایٹموں کا اپنے والینس شیل میں آٹھ الیکٹران حاصل کرنے کا رجحان ______ ہے؟
Octet rule
Duplet rule
Triplet rule
None of above
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Explanation
The octet rule states that atoms tend to gain , lose, or share electrons to achieve a full outer energy level, which typically corresponds to eight electrons in the valence shell. This rule is a fundamental principle in chemistry and is used to explain the formation of chemical bonds and the structure of molecules.
6 Cl^- ions
6 Na^+ ions
8 Cl^- ions
12 Cl^- ions
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Explanation
In a NaCl crystal lattice, each sodium (Na+) ion is surrounded by six chlorine (Cl-) ions, forming an octahedral geometry.This means that each Na+ ion is coordinated by six Cl- ions, and vice versa.
جو ایٹم اپنے بیرونی خول سے دو الیکٹران کھو کر آئن بناتا ہے اسے _____ کہتے ہیں؟
Oxygen
Potassium
Magnesium
Carbon
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Explanation
Magnesium (Mg) is an alkaline earth metal that loses two electrons from its outer shell to form a divalent cation (Mg²⁺).This means that it typically loses two electrons to form compounds, resulting in a valency of +2.
1
2
3
4
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Explanation
Group IIIA (or group 13) elements , such as boron (B), aluminum (Al), and gallium (Ga), lose three electrons to form ions with a charge of +3.This means that they typically form compounds by losing three electrons, resulting in a valency of +3.
کمرے کے درجہ حرارت پر زیادہ تر آئنک مرکبات ______ ہیں؟
Amorphous solids
Crystalline solids
Liquids
Gases
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Explanation
At room temperature , most ionic compounds are crystalline solids, meaning they have a rigid and orderly crystal structure.This is because the strong electrostatic forces between the oppositely charged ions hold them in a fixed position, creating a three-dimensional lattice.
دو فلورین ایٹم ______ کی الیکٹرانک ترتیب کو حاصل کرنے کے لیے اپنے سب سے بیرونی خول میں ایک ایک الیکٹران کا اشتراک کرتے ہیں؟
Xe
Ar
Kr
Ne
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Explanation
Fluorine (F) has an atomic number of 9 and an electronic configuration of 1s² 2s² 2p⁵. To achieve a stable electronic configuration , two fluorine atoms share one electron each to form a covalent bond.Resulting in a configuration similar to that of neon (Ne), which is 1s² 2s² 2p⁶.
انتہائی الیکٹران کی کمی والے ہائیڈروجن اور انتہائی برقی منفی ایٹم کے درمیان تعامل کو _____ کہتے ہیں؟
Covalent bond
Ionic bond
Hydrogen bond
Metallic bond
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Explanation
A hydrogen bond is a type of intermolecular force that arises between a highly electronegative atom ( such as oxygen, nitrogen, or fluorine). A hydrogen atom that is bonded to a highly electronegative atom. This interaction is typically weak compared to covalent bonds. But it is strong enough to influence the physical and chemical properties of molecules.
