Related InterviewSolutions

• What happens when ammonia solution is added first dropwise and then in excess to the following solution:(i) CuSO4 (ii) ZnSO4 (iii) FeCI3Write balanced equations for these reactions.
• Why does molarity of a solution depend upon temperature ?
• Define Analytical chemistry. Why is accurate measurement crucial in science?
• Round off each of the following quantities to two significant figures :a. 25.55 mL b. 0.00254 m c. 1.491 × 105 mg d. 199 g
• Express the following sum to appropriate number of significant figures :a. 2.3 × 103 mL + 4.22 × 104mL + 9.04 × 103mL + 8.71 × 105mL;b. 319.5 g – 20460 g – 0.0639 g – 45.642 g – 4.173 g
• Give the number of significant figures in each of the following :a. 1.230 × 104 b. 0.002030 c. 1.23 × 104d. 1.89 × 10-4
• How many significant figures are in each of the following quantities?a. 45.26 ft b. 0.109 in c. 0.00025 kg d. 2.3659 × 10-8 cm e. 52.0 cm f. 0.00020 kg g. 8.50 × 104 mm h. 300.0 cg
• Express the following quantities in exponential terms :a. 0.0003498 b. 235.4678 c. 70000.0 d. 1569.00
• The hydroxide which is soluble in excess of NaOH is [Zn(OH)2 / Fe(OH)3 / Fe(OH)2]
• Write each of the following numbers in ordinary decimal form :a. 3.49 × 10-11b. 3.75 × 10-1 c. 5.16 × 104d. 43.71 × 10-4 e. 0.011 × 10-3f. 14.3 × 10-2g. 0.00477 × 105h. 5.00858585