CBSE Class 9 c9solutions — practice questions
12 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 9 c9solutions in the app →Per NCERT Class 9 Science, the CONCENTRATION of a solution is defined as which of the following?Per NCERT, the formula for MASS BY MASS percentage (% m/m) is which expression?Per NCERT Example 5.1, if 10 g of salt is dissolved in 90 g of water, what is the mass-by-mass percentage of tPer NCERT, the MASS BY VOLUME percentage (% m/v) formula is which expression?Per NCERT Example 5.2, if 5 g of glucose is dissolved in water to make 100 mL of solution, what is the mass-byPer NCERT, a SALINE drip used in hospitals is typically what concentration of sodium chloride in water?Per NCERT, the VOLUME BY VOLUME percentage (% v/v) is used when which condition holds?Per NCERT, which scientist developed and implemented the Oral Rehydration Solution (ORS) treatment for choleraPer NCERT Example 5.3, if 1 mL of liquid pesticide is mixed with water to make 100 mL of spray, what is the v/Per NCERT, why is concentration EXPRESSED CAREFULLY for ORS, pesticides, and saline drips?Per NCERT, the SOLUBILITY of a substance is which concept?Per NCERT, on which factor does the solubility of MOST solids in water typically depend?