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۔
مندرجہ ذیل میں سے کون سی گیس سب سے تیزی سے پھیلتی ہے؟
Hydrogen
Chlorine
Fluorine
Helium
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Explanation
Hydrogen is typically the gas that diffuses the fastest because it has the lowest molar mass.
Molecular weight of 2.016 g/mol.
According to Graham's Law of Diffusion, the rate of diffusion of a gas is inversely proportional to the square root of its molecular weight.
Therefore, hydrogen diffuses the fastest.
مندرجہ ذیل میں سے کون سا خاکہ دکھاتا ہے کہ ایٹم ایک ہی برقی منفیت کے ساتھ جڑے ہوئے ہیں؟
A -----:----- B
A ----------: B
A :---------- B
A --:-------- B
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Explanation
The diagram that shows atoms are bonded with the same electronegativity is: A -----:----- B.In this representation, the bond is shown with a symmetrical distribution of electrons. It suggesting that the atoms have the same or very similar electronegativity.
الیکٹران کے باہمی اشتراک سے بننے والا بانڈ ______ ہے؟
Ionic bond
Coordinate covalent bond
Covalent bond
Metallic bond
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Explanation
A covalent bond is a chemical bond formed by the mutual sharing of electrons between two atoms. This type of bond typically occurs between nonmetal atoms , such as in molecules and organic compounds.
آئنک کرسٹل میں ______ ہے؟
High melting points
Moderate melting points
Low melting points
None of above
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Explanation
Ionic crystals are typically characterized by high melting points due to the strong electrostatic forces between the positively and negatively charged ions.The attractive forces between oppositely charged ions are strong, requiring a significant amount of energy to overcome, resulting in high melting points.
آئنک یا ہم آہنگی بانڈ سے انٹرمولیکولر قوتوں کی طاقت _______ ہے؟
Weaker
Stronger
Equal
None of above
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Explanation
Intermolecular forces are weaker than ionic or covalent bonds. Intermolecular forces are the attractive forces between molecules. While ionic and covalent bonds are the forces that hold atoms together within a molecule.
الیکٹران کے جوڑے جو ایٹموں میں مشترک نہیں ہوتے وہ _____ کہلاتے ہیں؟
Electron pairs
Lone pairs
Bond pairs
Shared pairs
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Explanation
Lone pairs are electron pairs that are not shared by atoms in a covalent bond.They are pairs of electrons that are localized on a single atom and are not involved in bonding.Lone pairs are also known as non-bonding pairs or free pairs.
3
4
5
6
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Explanation
Group VIA (also known as Group 16) elements have six electrons in their valence shell. Oxygen (O) is a member of this group, and its atomic number is 8.The electronic configuration of oxygen is 1s2 2s2 2p4, which shows that it has six electrons in its valence shell (two in the 2s orbital and four in the 2p orbitals).
مصنوعی رالیں ان جگہوں پر استعمال ہوتی ہیں جہاں _______؟
Electric resistance is required
Water resistance is required
Adhesion is required
Friction is required
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Explanation
Synthetic resins are used in places where adhesion is required. They provide strong bonding properties , making them ideal for coatings, glues, and composite materials.
جب دو ایک جیسے ایٹم الیکٹران کے جوڑے بانٹتے ہیں اور بانڈ کی شکل کے بجائے ایک دوسرے پر طاقت کا استعمال کرتے ہیں تو ______ ہے؟
Non-polar covalent bond
Polar covalent bond
Double covalent bond
Coordinate covalent bond
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Explanation
When two identical atoms share electron pairs and exert an equal force on each other, the bond formed is a non-polar covalent bond.This type of bond is characterized by a equal sharing of electrons, resulting in a balanced and symmetrical distribution of electrons.
Loses of electrons
Gain of electrons
Loses of protons
Gain of protons
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Explanation
A non-metal atom forms an anion (a negatively charged ion) by gaining one or more electrons.This means that the atom acquires additional electrons to form a negative ion.
