🔬 General Science Solved MCQs with Answers

Practice 4010 approved 🔬 General Science questions with verified answers from the 🌐 Current Affairs & GK subject for Pakistan exams.

4010 solved MCQs

A disease in the rate of breathing of the heart is called?Answer: Bradycardia What volume of oxygen at STP is required to burn 500 dm³ of ethene?Answer: 1500 dm³ What hybridization is present in the carbon atom in ethyne C₂H₂?Answer: Sp The cell membrane of muscle cell is:Answer: Sarcolemma Ca (Z=20) forms an ionic bond with Cl (Z=17), What is the chemical formula of Calcium Chloride?Answer: CaCl₂ Which of the following is formed when an excess of alcohol is treated with concentrated H₂SO₄ at low temperature?Answer: Diethyl ether Why do electrons have opposite spins when they are in the same orbital?Answer: This condition in less repulsion and opposite magnetic fields Organic compounds are classified into:Answer: Open chain and closed chain compounds In solids molecules are_____?Answer: Tightly packed ___ is the unit of measurement for the potential difference that cause a current to flow through a conductorAnswer: Volt The process by which atoms gain or lose electrons is called?Answer: Ionization The behavior of an ideal resister is dictated by the relationship specified by ___ .Answer: Ohm's law Which one of the following material is a conductor ?Answer: Silver A body rolling freely on the surface of earth eventually comes to rest becauseAnswer: It suffers fraction When you go to the supermarket and purchase toothpaste produced by Procter & Gamble (P&G), you are an example of P&G'sAnswer: Customers Four particles independently move at the same speed in a direction perpendicular to the same magnetic field. Which particle is deflected the most ?Answer: An electron Which one of the following is the property of a uniform gravitational fieldAnswer: The gravitational potential has the same value at all points within it A ball falls vertically and bounces on the ground . The following statements are about the focus acting while the balls is in contact with the ground. Which statement is correct ?Answer: The force that the ball exerts on the ground is always equal in magnitude and opposite in the direction to the force the ground exerts on the ball Newton's third law concerns the forces of interaction between two bodies. Which of following statements relating to third law is not correct ?Answer: The two forces are equal and opposite so the bodies are in equilibrium Which of the following physical phenomena can not be described only by the wave theory of electromagnetic radiation?Answer: Photoelectric emission An object whose mass is 100 grams starts from rest and moves with consent acceleration of 20 centimeters per second square. At the end of 8 seconds its momentum is in g cm/sAnswer: 16000 If a process can not be retraced in the backward direction by reversing the controlling factors. it is anAnswer: Irreversible process The potential difference between the terminal of a battery in open circuit is 2.3 V .Where it is connected accross a resistence of 5.0 .The potential fails to 1.5 V . What is the current of batteryAnswer: 0.36 A On the ground of gravitational force on a satellite is W. What is the gravitational force when at R/50 , where R is the radius of earth ?Answer: 0.96 w Which of the following treatment is formed when form aldehyde is treated with oxidizing mixture (H₂SO₄ + K₂ Cr₂O₇)Answer: Methanoic acid Benzene is subjected to (1) Alkylation (2) Nitration (3) Oxidation, the product is:Answer: o-nitrobenzonic acid and p-nitrobenzonic During the sliding of actin filaments, ATP is used for?Answer: Cross bridge breaking The valence shell electronic configuration of an element is 4s^2, 4p^1. To which group does the element belong?Answer: III-A Which of the following is different in Na⁺ (Z = 11), Mg²⁺ (Z=12) and Al³⁺ (Z=13)?Answer: Number of proton CO₂ and SO₂ are two compounds. Which of the following best describe these two compound?Answer: CO₂ is linear and non-polar SO₂ is angular and polar