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- Question
Which of the following is an Organic Molecule?
Options- A. Nitrogen gas
- B. Ammonia
- C. Fructose
- D. Water
- Correct Answer
- Fructose
ExplanationFructose is an Organic molecule among the given options.
Organic Molecules :
An organic molecule is one which contains carbon, although not all compounds that contain carbon are organic molecules. Noticeable exceptions are carbon monoxide (CO), carbon dioxide (CO2), carbonates (e.g. calcium carbonate), carbides (e.g. calcium carbide) and cyanides (e.g. sodium cyanide). Pure carbon compounds such as diamond and graphite are also not organic compounds. Organic molecules can range in size from simple molecules to complex structures containing thousands of atoms.
Although carbon is present in all organic compounds, other elements such as hydrogen (H), oxygen(O), nitrogen (N), sulfur (S) and phosphorus (P) are also common in these molecules.
In simple, Molecules needed for life that have carbon are called Organic Molecules.
- 1. The pH of pure water is nearly 7.It will increase on the addition of
Options- A. ammonia
- B. cane sugar
- C. common salt
- D. hydrochloric acid Discuss
- 2. The enzyme in whosepresence glucose and fructose are converted into alcohol is
Options- A. Diastase
- B. Maltase
- C. Invertase
- D. Zymase Discuss
- 3. Which one is not the isotopes of hydrogen
Options- A. Protium
- B. Deuter
- C. Tritium
- D. All Discuss
- 4. In isotopes the number of neutrons are
Options- A. same
- B. different
- C. both
- D. none Discuss
- 5. Of the following radiations, the most easily stopped by air
Options- A. alpha - rays
- B. beta - rays
- C. gamma -rays
- D. x - rays Discuss
- 6. What does one mole of H2O correspond to
Options- A. 16 gms
- B. 18 gms
- C. 20 gms
- D. 22 gms Discuss
- 7. Which sample is a pure substance?
Options- A. Table salt
- B. Pure water
- C. a test tube of zinc oxide
- D. All the above Discuss
- 8. Which of the following is an example of chemical weathering?
Options- A. Oxidation
- B. Acid rains
- C. Carbonation
- D. All the above Discuss
- 9. Which of the following atoms has the largest radius?
Options- A. Br
- B. K
- C. Na
- D. Cl Discuss
- 10. Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :
Options- A. An acetylenic triple bond
- B. Two ethylenic double bonds
- C. A vinyl group
- D. An isopropyl group Discuss
Chemistry problems
Search Results
Correct Answer: ammonia
Explanation:
Ammonia is a base. One adding ammonia to water,the resulting solution will become basic. pH of an alkaline solution is 7. So the pH will increase
Correct Answer: Zymase
Correct Answer: Tritium
Correct Answer: different
Correct Answer: alpha - rays
Correct Answer: 18 gms
Explanation:
The molar mass of H2O can be calculated as the following.
M(H2O)= [2 x M(H)] + [M(O)].
And we know that M(H) = 1g/mol, M(O) = 16g/mol.
So, M(H2O)= 2x1 + 16 = 18g/mol,
That means 1 mole of H2O contains 18g.
Hence, one mole of H2O corresponds to 18 grams.
Correct Answer: All the above
Explanation:
A pure substance can be defined as any single type of material that has not been contaminated by another substance. In chemistry, a pure substance has a definite composition. It can be a compound or an element. A pure substance is considered to be a material that consists of one type of "building block" of matter.
Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate).
Tin, sulfur, and diamond are examples of pure substances which are chemical elements. All elements are pure substances.
Water, sugar, salt and baking soda are pure substances which are chemical compounds. Chemical compounds also are pure substances
Correct Answer: All the above
Explanation:
Chemical weathering is what happens when rocks are broken down and chemically altered.
Chemical weathering is the breakdown of rocks by chemical reactions. Chemical weathering involves changes in the chemical composition of the existing rock to form new rock. Some examples of chemical weathering are hydrolysis, oxidation, carbonation, dissolution, etc.
Correct Answer: K
Explanation:
For neutral atoms, the periodic trends in atomic size can be described like this
Atomic size decreases when going from left to right across a period,
Atomic size increases when going from top to bottom down a group.
Let's use these trends to try and figure out which atom would have the largest radius.
If you look at elements that are located in the same group, potassium will have a larger atomic radius when compared with sodium. Likewise, bromine will have a larger atomic radius when compared with chlorine.
Now focus on potassium and bromine. Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.
Correct Answer: A vinyl group
Explanation:
Vinylic group.
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