Chemistry, asked by shrinikpreddy2008227, 9 months ago

1. One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average
adult human body ? [ ]

1) 1 kilogram 2) 500 grams 3) 250 grams 4) practically none
2. If you fill a glass to the brim with ice water and the ice melts, what will happen? [ ]

1) The glass will over flow as the ice turns to water
2) The level of water in the glass will remain unchanged as the ice melts.
3) The water level will drop slightly as the ice melts.
4) I’ll never find out because I’ll drink the water or walk away before anything happens.
3. The symbol Sb stands for stibnum or stibnite. What is the modern name of this element?[ ]

1) Arsenic 2) Tin 3) Antimony 4) Samarium
4. Water-based liquids can be described as acidic, neutral, or basic with respect to pH. Which of
these describes milk ? Milk does not have a pH [ ]

1) Slightly Acidic 2) Strong Acid 3) Neutral 4) Slightly Basic
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CHEMISTRY - 6

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5. DNA codes for proteins which are the building blocks of organisms. What is the most abundant
protein in the human body ? [ ]

1) Tubulin 2) Albumin 3) Collagen 4) Keratin
6. Noble gases are inert because they have completed outer electron shells. Which of these elements
isn’t a noble gas ? [ ]

1) Helium 2) Argon 3) Chlorine 4) Krypton
7. What is the most common isotope of hydrogen ? [ ]

1) Protium 2) Deuterium
3) Tritum 4) Hydrogen only has one isotope
8. You can’t live without water ! What is its chemical formula ? [ ]

1) H2

2) O2

3) H2O 4) H2O2

9. Who is credited with the invention of the modern periodic table ? [ ]

1) Nobel 2) Lavoisier 3) Mendel 4) Mendeleev
10. Which of these elements is a nonmetal ? [ ]

1) Sulfur 2) Manganese 3) Aluminum 4) Beryllium

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11. Organic chemistry is the study of the compounds that make up living organisms. All organic
molecules contain : [ ]

1) Carbon Only 2) Carbon and Nitrogen
3) Carbon and Hydrogen 4) Carbon, Hydrogen, and Oxygen
12. The symbol Ag stands for which element ? [ ]

1) Gallium 2) Magnesium 3) Gold 4) Silver
13. Three of the most common states of matter are solids, liquids, and gases, A liquid has :

1) a defined volume, but not a defined shape 2) a definite shape, but no defined volume
3) a definite volume and shape 4) no defined volume or shape
14. You can’t live without iron. Where in the body is most of the iron located ? [ ]

1) your brain 2) your skin 3) your bones 4) your blood
15. A mole contains Avogadro’s number of items. What is Avogadro’s number ? [ ]

1) 6023 2) 6.023 × 1023 3) 6.023 × 10–23 4) 3 × 108

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16. What do you call an atom that has more protons than electrons ? [ ]

1) a molecule 2) an isotope 3) an anion 4) a cation
17. All of the following are amino acids except. [ ]

1) Tryptophan 2) Leucine 3) Tyrosine 4) Adenine
18. A drop of food coloring spreading out in a cup of water is an example of which transport
process ? [ ]

1) Diffusion 2) Osmosis 3) Vapor pressure 4) Effusion
19. In a solution salt water (a saline solution), salt is the [ ]

1) Solute 2) Solvent 3) Colloid 4) Sol
20. All of the following elements are liquids around room temperature except which one? [ ]

1) Gallium 2) Magnesium 3) Bromine 4) Mercury

Answers

Answered by mahamasa
4

Answer:

1) 250g

2) The glass will over flow as the ice turns into water

3) Antimony

4) Neutral

Explanation:

Answered by smartbrainz
1

1. One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average

adult human body ? [ ]

3) 250 grams

2. If you fill a glass to the brim with ice water and the ice melts, what will happen? [ ]

1) The glass will over flow as the ice turns to water

3. The symbol Sb stands for stibnum or stibnite. What is the modern name of this element?[ ]

3) Antimony

4. Water-based liquids can be described as acidic, neutral, or basic with respect to pH. Which of

these describes milk ? Milk does not have a pH [ ]

1) Slightly Acidic

5. DNA codes for proteins which are the building blocks of organisms. What is the most abundant

protein in the human body ? [ ]

2) Albumin

6. Noble gases are inert because they have completed outer electron shells. Which of these elements isn’t a noble gas ? [ ]

3) Chlorine

7. What is the most common isotope of hydrogen ? [ ]

1) Protium

8. You can’t live without water ! What is its chemical formula ? [ ]

3) H2O

9. Who is credited with the invention of the modern periodic table ? [ ]

4) Mendeleev

10. Which of these elements is a nonmetal ? [ ]

1) Sulfur

11. Organic chemistry is the study of the compounds that make up living organisms. All organic

molecules contain : [ ]

4) Carbon, Hydrogen, and Oxygen

12. The symbol Ag stands for which element ? [ ]

4) Silver

13. Three of the most common states of matter are solids, liquids, and gases, A liquid has :

1) a defined volume, but not a defined shape

14. You can’t live without iron. Where in the body is most of the iron located ? [ ]

4) your blood

15. A mole contains Avogadro’s number of items. What is Avogadro’s number ? [ ]

3) 6.023 × 10–23

16. What do you call an atom that has more protons than electrons ? [ ]

4) a cation

17. All of the following are amino acids except. [ ]

4) Adenine

18. A drop of food coloring spreading out in a cup of water is an example of which transport

process ? [ ]

1) Diffusion

19. In a solution salt water (a saline solution), salt is the [ ]

1) Solute

20. All of the following elements are liquids around room temperature except which one? [ ]

4) Mercury

Explanation:

  • A pure substance can never be separated by using ordinary physical methods used up as a result of this we need to find out whether a substance is pure or not.
  • Pure substances are those substances which consists of the elements and compounds. The cannot be broken down by ordinary physical means by boiling or distillation.
  • However the impure substances or mixture can be separated by physical means. Hence impure substance are easier to separate from each other. Also pure substances can only be broken down by the process of electrolysis

To know more about pure substances,

Which of the following is not a pure substance? a. Common salt b ...

brainly.in/question/7245400

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