Subject: SALU Entry Test Past Papers and Syllabus

Explanation
Dative bond : This is a type of covalent bond where one atom donates both electrons to the bond, forming a coordinate covalent bond. In this case,  NH₃ (ammonia)  (with a lone pair of electrons) acts as the electron donor , and  BF₃ (boron trifluoride)  (electron deficient) acts as the electron acceptor .

Explanation
John Dalton proposed the Atomic Theory in the early 1800s , stating that all elements are made of indivisible atoms. He described atoms as indestructible and identical for each element, laying the foundation of modern chemistry .

Explanation
A reaction in which heat is absorbed is called an endothermic reaction. These reactions lower the temperature of their surrounding area, thereby creating a cooling effect.

Explanation
Given y = 3: Step 1: Calculate y³. y³ = 3³ = 27 Step 2: Calculate y³ - y. y³ - y = 27 - 3 = 24 Step 3: Calculate y³(y³ - y). y³(y³ - y) = 27 × 24 = 648

Explanation
When a projectile moves upward , gravity acts downward. This opposes the vertical motion , so the vertical component of velocity decreases until it becomes zero at the highest point.

Explanation
20 men can construct a building in 40 days. Total work = 20 men × 40 days = 800 man-days. Time = Total work / Number of men = 800 man-days / 10 men = 80 days.

Explanation
Step 1: Calculate 8% of $600 8% of $600 = (8/100) × $600 Step 2: Perform the calculation = 0.08 × $600 = $48

Explanation
Vitamin K is essential for the synthesis of clotting factors in the blood. Its deficiency leads to prolonged bleeding or poor blood clotting.

Explanation
In the modern periodic table, there are 7 periods (horizontal rows) and 18 groups (vertical columns).

Explanation
NO₂ (Nitrogen dioxide) is a covalent compound , made of nonmetals (nitrogen and oxygen) sharing electrons. The others like (NH₄)₂CO₃, HNO₃, and AgCl involve ionic bonding either fully or in part (e.g., NH₄⁺ acts ionically).

Explanation
Dative bond : This is a type of covalent bond where one atom donates both electrons to the bond, forming a coordinate covalent bond. In this case,  NH₃ (ammonia)  (with a lone pair of electrons) acts as the electron donor , and  BF₃ (boron trifluoride)  (electron deficient) acts as the electron acceptor .

Explanation
John Dalton proposed the Atomic Theory in the early 1800s , stating that all elements are made of indivisible atoms. He described atoms as indestructible and identical for each element, laying the foundation of modern chemistry .

Explanation
A reaction in which heat is absorbed is called an endothermic reaction. These reactions lower the temperature of their surrounding area, thereby creating a cooling effect.

Explanation
Given y = 3: Step 1: Calculate y³. y³ = 3³ = 27 Step 2: Calculate y³ - y. y³ - y = 27 - 3 = 24 Step 3: Calculate y³(y³ - y). y³(y³ - y) = 27 × 24 = 648

Explanation
When a projectile moves upward , gravity acts downward. This opposes the vertical motion , so the vertical component of velocity decreases until it becomes zero at the highest point.

Explanation
20 men can construct a building in 40 days. Total work = 20 men × 40 days = 800 man-days. Time = Total work / Number of men = 800 man-days / 10 men = 80 days.

Explanation
Step 1: Calculate 8% of $600 8% of $600 = (8/100) × $600 Step 2: Perform the calculation = 0.08 × $600 = $48

Explanation
Step 1: Recall the definition of probability Probability is a measure between 0 and 1, inclusive. Step 2: Evaluate the options 15% = 0.15 (between 0 and 1) 2/3 ≈ 0.67 (between 0 and 1) -0.5 (less than 0) 0.01 (between 0 and 1) Step 3: Determine which option is outside the valid range -0.5 is less than 0, which is not valid for a probability.

Explanation
Step 1: Identify the pattern The differences between consecutive terms are: 32 - 29 = 3 29 - 24 = 5 24 - 22 = 2 22 - 17 = 5 Step 2: Determine the pattern The pattern seems to alternate between subtracting 3 or 2 and then 5: -3, -5, -2, -5 Step 3: Apply the pattern If the pattern continues, the next difference should be -3 (following the sequence -3, -5, -2, -5, -3): 17 - 3 = 14

Explanation
91 is not a prime number because it is divisible by 7 and 13 (91 = 7 × 13). A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers.

Explanation
Step 1: Let's denote the age of the youngest child as x. The ages of the 5 children will be x, x + 3, x + 6, x + 9, and x + 12. Step 2: Calculate the sum of their ages. x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 50 Step 3: Simplify the equation. 5x + 30 = 50 Step 4: Solve for x. 5x = 20 x =  4

Explanation
A quadratic equation is defined as an equation where the highest exponent (degree) of the variable is 2 , like  ax² + bx + c = 0 . Hence, its degree is 2 .

Explanation
The total angle around a circle is always 360 degrees . This represents a full rotation or complete turn .

Explanation
In a sequence, each individual number or element is called a term . Terms can be identified by their position, such as the 1st term, 2nd term, etc.

Explanation
Given the speed of the car is 65 miles per hour: Step 1: Calculate the distance traveled in 5 hours. Distance = Speed × Time = 65 × 5 = 325

Explanation
Hazrat Jibrael ( AS ) delivered the Message to every Prophet from Hazrat Adam to Muhammad (pbuh). Izra'il – The Angel of Death, who takes the souls from bodies when people die. Israfil – The angel who will be present on the day of resurrection . Mīkāl _ is often depicted as providing nourishment for bodies and souls while also being responsible for bringing rain and thunder to Earth.

Explanation
Ishaq Dar is the current and 39th Foreign Minister of Pakistan since March 2024. He replaced Jalil Abbas Jilani. Note: Senator Mohammad Ishaq Dar is the 4th Deputy Prime Minister of Pakistan Update & verified on 09-06-2024 Reference  Click here

Explanation
Step 1: Recall the definition of probability Probability is a measure between 0 and 1, inclusive. Step 2: Evaluate the options 15% = 0.15 (between 0 and 1) 2/3 ≈ 0.67 (between 0 and 1) -0.5 (less than 0) 0.01 (between 0 and 1) Step 3: Determine which option is outside the valid range -0.5 is less than 0, which is not valid for a probability.

Explanation
Step 1: Identify the pattern The differences between consecutive terms are: 32 - 29 = 3 29 - 24 = 5 24 - 22 = 2 22 - 17 = 5 Step 2: Determine the pattern The pattern seems to alternate between subtracting 3 or 2 and then 5: -3, -5, -2, -5 Step 3: Apply the pattern If the pattern continues, the next difference should be -3 (following the sequence -3, -5, -2, -5, -3): 17 - 3 = 14

Explanation
91 is not a prime number because it is divisible by 7 and 13 (91 = 7 × 13). A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers.

Explanation
Step 1: Let's denote the age of the youngest child as x. The ages of the 5 children will be x, x + 3, x + 6, x + 9, and x + 12. Step 2: Calculate the sum of their ages. x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 50 Step 3: Simplify the equation. 5x + 30 = 50 Step 4: Solve for x. 5x = 20 x =  4

Explanation
A quadratic equation is defined as an equation where the highest exponent (degree) of the variable is 2 , like  ax² + bx + c = 0 . Hence, its degree is 2 .

Explanation
The total angle around a circle is always 360 degrees . This represents a full rotation or complete turn .

Explanation
In a sequence, each individual number or element is called a term . Terms can be identified by their position, such as the 1st term, 2nd term, etc.

Explanation
Given the speed of the car is 65 miles per hour: Step 1: Calculate the distance traveled in 5 hours. Distance = Speed × Time = 65 × 5 = 325

Explanation
Hazrat Jibrael ( AS ) delivered the Message to every Prophet from Hazrat Adam to Muhammad (pbuh). Izra'il – The Angel of Death, who takes the souls from bodies when people die. Israfil – The angel who will be present on the day of resurrection . Mīkāl _ is often depicted as providing nourishment for bodies and souls while also being responsible for bringing rain and thunder to Earth.

Explanation
Ishaq Dar is the current and 39th Foreign Minister of Pakistan since March 2024. He replaced Jalil Abbas Jilani. Note: Senator Mohammad Ishaq Dar is the 4th Deputy Prime Minister of Pakistan Update & verified on 09-06-2024 Reference  Click here