1.) Alcohocol as disenfectant is normally sold as a solution of 70% ethyl or isopropyl alcohol.
A. 30ml B. 60ml C. 70ml
D. 75ml
2.) A beverage contains 3% alcohol which mean that _______.
A. The solution contains 30ml of alcohol.
B. The solution contains 30ml water in 70ml of water.
C. The solution contains 3ml of alcohol in 97 ml of water.
D. The solution contains 300ml of alcohol in 700ml of water.
3.) What is the percent by volume of ethanol in a solution that contains 35 milliliters of ethanol dissolved in 115 milliliters of water?
A. 0.23% B. 2.33% C. 23.33% D. 25.00%
4.) What is the percent by volume of isopropyl alcohol in a solution that contains 24ml of isopropyl alcohol in 1.1L of water?
A. 1.20% B. 2.18% C. 2.22%
D. 12.21
5.) Nail polish is said to have varnish as a solute and propanone as a solvent. How much propanone is present in 50% concentration of 150ml solution?
A. 50ml B. 55ml C. 70ml
D. 75ml
6.) Antifreeze is an additive to lower freezing point which is compose of ethylene glycol and water and is said to have 50% composition. How much solute and solvent is present?
A. In 100ml, ethylene glycol is 50ml and water is 75ml.
B. In 2L, ethylene glycol is 50ml and water is 1000ml.
C. In 1.5L, ethylene glycol is 1000ml and water is 500ml.
D. In 20.5L, ethylene glycol is 10200ml and water is 10300ml
7.) Vinegar is said to contain 5% acetic acid. How much water is present in a 500ml solution?
A. 25ml B. 250ml C. 332 ml
D. 475ml
8.) Povidone iodine is a 10% antiseptic solution. In a 120ml solution, how many ml of iodine is present?
A. 12ml B. 15ml C. 18ml D. 21ml
FOR ITEMS 9-10, REFER TO THE GIVEN PROBLEM BELOW.
A 150ml agua oxygenada solution is found to contain 0.75ml hydrogen peroxide, 2.55ml lactic acid, 0.75ml dodecyl benzene sulfonic acid and 145.95ml of inert ingredients.
9.) What is the percent by volume of hydrogen peroxide?
A. 0.5% B. 1.7% C. 3.6%
D. 97.3%
10.) What is the percent by volume of lactic acid?
A. 0.5% B. 1.7% C. 3.6%
D. 97.3%
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Answer:
1.C.
2. C.
3.D.
4.A.
5.B.
6.B.
7.D.
8.A
9.A
10.B
Explanation:
THAT MY QUESTION
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Answer:
1. C
2. B
3. C
4. B
5. D
6. A
7. D
8. A
9 . A
10. B
Explanation:
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