All the following can lead to loss of soil and soil fertility except...

Here are the solutions to the questions: 1. All the following can lead to loss of soil and soil fertility except... Green manuring involves growing crops specifically to be plowed into the soil to improve its fertility and structure, thus enhancing soil fertility rather than causing its loss. Surface mining, overgrazing, and poor tillage practices all contribute to soil degradation and loss of fertility. The correct option is C. 2. The rate of change of distance travelled by wave with respect to time is called........... The rate of change of distance with respect to time is the definition of velocity. The correct option is A. 3. Which of the following is not a source of heat? Moonlight is reflected sunlight and provides very little thermal energy to be considered a significant source of heat. Sunlight, mechanical energy (e.g., from friction), and friction itself are all sources of heat. The correct option is A. 4. All the methods and practices used to prevent and control loss of soil and soil fertility is referred to as soil ............ The comprehensive term for methods and practices aimed at preventing and controlling the loss of soil and soil fertility is soil conservation. The correct option is B. 5. The pancreatic juice contains all the following except ............ Pancreatic juice contains enzymes like trypsin, lipase, and pancreatic amylase. Pepsin is a protease produced in the stomach, not the pancreas. The correct option is D. 6. A piece of stone weighs 15kg and its mass is 40m³. Calculate the density of the stone. Assumption:* The question likely meant "its mass is 15kg" and "its volume is 40m³" as mass is measured in kg and volume in m³. Step 1: Identify the given values. Mass (m) = 15\, kg Volume (V) = 40\, m^3 Step 2: Use the formula for density. Density () = MassVolume Step 3: Substitute the values and calculate. = 15\, kg40\, m^3 = 0.375\, kg/m^3 The correct option is A. 7. Constipation in man can be prevented through all the following except ............ Eating too much dry foods, which often lack fiber and water, can contribute to or worsen constipation, rather than preventing it. Eating fruits and vegetables, drinking enough water, and regular exercise all help prevent constipation. The correct option is D. 8. Convert 156 metres to millimetres (mm)? Step 1: Recall the conversion factor. 1\, metre = 1000\, millimetres Step 2: Multiply the given value by the conversion factor. 156\, m × 1000\, mmm = 156000\, mm The correct option is C. 9. One property of metals is that, they are Metals are generally known for being malleable (can be hammered into thin sheets) and ductile (can be drawn into wires). They are typically good conductors of heat and electricity, and many are reactive with acids. The correct option is A. 10. Which of the following will not cause food poisoning? Proper storage and temperature control prevents the growth of harmful bacteria in food, thereby preventing food poisoning. Improper cooking, unhygienic practices, and cross-contamination are all common causes of food poisoning. The correct option is C. 11. Calculate the amount of substance in 20g of C₆H₁₂O₆? [C=12 H=1 O=16] Step 1: Calculate the molar mass of C₆H₁₂O₆. Molar mass = (6 × 12) + (12 × 1) + (6 × 16) Molar mass = 72 + 12 + 96 Molar mass = 180\, g/mol Step 2: Calculate the amount of substance (moles). Moles = MassMolar mass Moles = 20\, g180\, g/mol Moles ≈ 0.111\, mol The closest option is B. 12. Which of the following practices cannot cause diseases in man? Keeping good personal hygiene helps prevent the spread of germs and reduces the risk of infectious diseases, thus it cannot cause diseases. Living in a poor environment, eating unbalanced meals, and unnecessary stress can all contribute to various health problems and diseases. The correct option is B. Send me the next one 📸