Practise Branch of Science MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Study Branch of Science through multiple-choice questions in Everyday Science. This subtopic contains 2513 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
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Answer: Alkyl radical
Explanation An alkyl group is formed by removing a hydrogen atom from an alkane, and since the hydrogen atom is removed with one bonding electron, the resulting group has an unpaired electron, making it a radical.
بھاپ پہلے ہی مکینیکل توانائی میں تبدیل ہوتی ہے عام طور پر
Answer: Colder
Explanation A Steam Turbine is a mechanical device that extracts thermal energy from pressurized steam and transforms it into mechanical work .
Answer: 0.77 m
Explanation To find the separation between compression and the adjacent rarefaction of sound waves produced by a tuning fork, we can use the following steps:
Answer: 3:8
Explanation In Carbon dioxide, carbon and oxygen will always combine in a ratio of 3:8 by mass. The mass of oxygen required to combine with 12g of carbon is 32 grams.
نقشے پر پیمانہ دکھانے کے کتنے طریقے ہیں؟
Answer: 3
Explanation The three methods of showing scale on a map are verbal scale (written statement), graphic scale (bar scale), and representative fraction (RF or ratio scale). These methods help interpret distances accurately when transferring real-world measurements onto a map.
Answer: It loses activity permanently above 50 C
Explanation If the temperature increases from 37 degrees Celsius to 50 degrees Celsius, the enzyme activity will decrease. enzymes are proteins, they are denatured by heat. Therefore, at higher temperatures (over about 55°C in the graph below ) there is a rapid loss of activity as the protein suffers irreversible denaturation.
Answer: When there is no chest rise and fall
Explanation When there is no chest rise and fall you will decide to continue CPR on an unconscious patient *** Cardiopulmonary Resuscitation is meant CPR *** The compression to ventilation ratio during CPR is: 15:2 More than a hundred times per minute should be the rate of chest compression while doing CPR Prolong CPR is suggested for a patient with Electric Shock You should compress the chest about 1.5 inches or 4 cm .
انسانی خون کا پی ایچ کس سے برقرار رہتا ہے؟
Answer: Buffer system
Explanation The pH of the human body is maintained through several integrated mechanisms Including: Chemical buffer systems, The respiratory system The renal system. A blood pH range of 7.35 to 7.45 is essential for proper bodily function; deviations outside this range can lead to acidosis or alkalosis.
Answer: 2
Explanation Formula: pH = -log[H⁺] [H⁺] = 0.01 = 10⁻² pH = -log(10⁻²) = 2
Answer: Carboxylic acid
Explanation Hydrolysis of a nitrile (a carbon-nitrogen triple bond) yields carboxylic acids. Hydrolysis is a reaction where water breaks down a molecule. In the case of nitrile hydrolysis, water reacts with the nitrile to break the carbon-nitrogen triple bond and form a carboxylic acid . The general reaction is: R-C≡N + H2O → R-COOH
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