1) Which products do we use yeast to make? Choose all correct answers. a) Beer b) Wine c) Cheese d) Yoghurt 2) What products do we use bacteria to make? Choose all correct answers. a) Cheese b) Yoghurt c) Beer d) Wine 3) In fermentation, what is the name of the gas produced? a) Carbon Dioxide b) Oxygen c) Water d) Carbon Monoxide 4) In fermentation what is the name of the compound produced that is useful in brewing? a) Alcohol b) Glucose c) Aldehyde d) Vinegar 5) When using a microscope, what is the place where you put the slide called? a) Stage b) Objective Lens c) Eyepiece d) Light Source 6) When using a microscope, what are the three lens you can change called? a) Objective Lenses b) Eye Piece Lens 7) Which of these is NOT needed when making a slide for observation? a) Stain b) Thin sample c) Coverslip d) Thick sample 8) What do you need below the stage in a microscope? a) Light Source b) Eyepiece c) Objective Lens d) Focus Dial 9) Which of these is NOT a micro-organism? a) Lichen b) Bacteria c) Virus d) Fungi 10) If the objective lens is x4 and the eyepiece lens is x10. What is the total magnification? a) 40 b) 400 c) 0.4 d) 0.25 11) You need to make 300 ml of a 10% w/v solution of Copper Sulphate. How much Copper Sulphate do you need to weigh? a) 30g b) 3g c) 300g d) 0.3g 12) You have weighed 25g of Sodium Chloride in 400 ml of water. What is the w/v % concentration? a) 6.25% b) 10,000% c) 16% d) 62.5% 13) You need to make 500 ml of a 15% w/v solution of Lead Sulphate. How much Lead Sulphate do you need to weigh? a) 75g b) 750g c) 7.5g d) 0.75g 14) You have weighed 15g of Lithium Chloride in 300 ml of water. What is the w/v % concentration? a) 0.5% b) 5% c) 1% d) 10% 15) When preparing molar concentrations, C= n/v. What is the formula for n? a) n= C x v b) n = C/v c) n = v/C d) n = C+v 16) What is 750 ml in L? a) 0.75L b) 75L c) 7.5L d) 0.075L 17) What is 365 ml in L? a) 0.365L b) 36.5L c) 0.0365L d) 3.65L 18) You want to make 1000 ml of a 3 mol/L solution of sodium chloride. How much sodium chloride do you need to weigh (1 mole = 58g)? a) 174g b) 19.3g c) 193g d) 17.4g 19) You want to make 2000 ml of a 2.5 mol/L solution of iron sulphide. How much iron sulphide do you need to weigh (1 mole = 120g)? a) 600g b) 48g c) 4.8g d) 1200g 20) You want to make 500 ml of a 4 mol/L solution of calcium chloride. How much calcium chloride do you need to weigh (1 mole = 110g)? a) 220g b) 2200g c) 440g d) 27.5g

Lab Science Review Quiz

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