Question 14: The purpose of the constriction in the stem of a clinical thermometer is to

Here are the solutions to the questions: Question 14: The purpose of the constriction in the stem of a clinical thermometer is to The constriction in a clinical thermometer prevents the mercury from flowing back into the bulb immediately after use, allowing time for the temperature to be read accurately. Answer: B. Prevent the liquid from flowing back into the bulb Question 15: Which of the following diseases is caused by a virus? Chickenpox is a highly contagious disease caused by the varicella-zoster virus. Answer: C. Chicken pox Question 16: The root system of a plant develops from the The radicle is the embryonic root of a plant, which develops into the primary root system. Answer: C. Radicle Question 17: Chlorine is used in water treatment to Chlorine is a powerful disinfectant used to kill harmful microorganisms, such as bacteria and viruses, in water. Answer: C. Kill microbes in the water Question 18: Carbon monoxide is poisonous to humans when inhaled because it Carbon monoxide binds to hemoglobin in red blood cells much more readily than oxygen, forming carboxyhemoglobin and preventing oxygen transport to the body's tissues. Answer: D. Blocks the path of oxygen with the blood Question 19: A person suffering from constipation should takes in enough Roughage (dietary fiber) adds bulk to stool and helps it pass through the digestive system, preventing constipation. Answer: B. Roughages Question 20: Calculate the current passing through an electric kettle that operates at 110V and has an effective resistance of 10. Step 1: Identify the given values and the formula. We are given voltage V = 110V and resistance R = 10. We need to find the current I. Ohm's Law states V = IR. Step 2: Rearrange the formula to solve for current. I = (V)/(R) Step 3: Substitute the values and calculate the current. I = 110V10 = 11A Answer: A. 11A Question 21: Inorganic components of soil includes the following except Humus is decomposed organic matter, making it an organic component of soil, unlike mineral ions, soil water, and soil air which are inorganic. Answer: C. Humus Question 22: A chemical test for water in the laboratory is its ability to Anhydrous copper (II) sulfate is a white solid that turns blue in the presence of water, making it a common chemical test for water. Answer: D. Turns white anhydrous copper (II) sulphate blue Question 23: A fruit with sticky covering is likely to be dispersed by Fruits with sticky coverings are adapted to attach to the fur or feathers of animals, which then carry them to new locations for dispersal. Answer: B. Mammals Question 24: How many moles of HCl are there in 7.3g of HCl? Step 1: Determine the molar mass of HCl. Molar mass of H ≈ 1.0 g/mol Molar mass of Cl ≈ 35.5 g/mol Molar mass of HCl = 1.0 + 35.5 = 36.5 g/mol Step 2: Use the formula for moles. Moles = MassMolar Mass Step 3: Substitute the given mass and molar mass to calculate the moles. Moles = 7.3g36.5 g/mol = 0.2 mol Answer: C. 0.2mol Question 25: The density of a substance is 16gcm^-3. Calculate its volume, if it has a mass of 8g. Step 1: Identify the given values and the formula. We are given density = 16gcm^-3 and mass m = 8g. We need to find the volume V. The formula for density is = (m)/(V). Step 2: Rearrange the formula to solve for volume. V = (m)/() Step 3: Substitute the values and calculate the volume. V = 8g16gcm^-3 = 0.5cm^3 Answer: A. 0.5cm^3 Question 26: Exhaled air may readily put off a burning candle because it contains a high level of Exhaled air has a significantly higher concentration of carbon dioxide and water vapor compared to inhaled air. Carbon dioxide is a non-combustible gas that smothers the flame, and water vapor helps to cool it, both contributing to extinguishing the candle. Answer: C. Carbon dioxide and Water vapour Send me the next one 📸