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- Question
Of the following radiations, the most easily stopped by air
Options- A. alpha - rays
- B. beta - rays
- C. gamma -rays
- D. x - rays
- Correct Answer
- alpha - rays
- 1. Gamma rays are
Options- A. high energy electrons
- B. low energy electrons
- C. high energy electromagnetic
- D. high energy positrons waves Discuss
- 2. Nucleons are
Options- A. protons and neutrons
- B. neutrons and electros
- C. protons and electrons
- D. protons, neutrons and electrons Discuss
- 3. Rutherford's alpha-scattering experiment related to the size of the
Options- A. nucleus
- B. atom
- C. electron
- D. neutron Discuss
- 4. In addition to nitric acid, another acid which may render iron passive is
Options- A. acetic acid
- B. oxalic acid
- C. chromic acid
- D. citric acid Discuss
- 5. Wavelength of which of the following colours of the visible spectrum of light are maximally absorbed by green plants________
Options- A. Green and Yellow
- B. Red and Blue
- C. Green and Red
- D. Blue and Yellow Discuss
- 6. In isotopes the number of neutrons are
Options- A. same
- B. different
- C. both
- D. none Discuss
- 7. Which one is not the isotopes of hydrogen
Options- A. Protium
- B. Deuter
- C. Tritium
- D. All Discuss
- 8. The enzyme in whosepresence glucose and fructose are converted into alcohol is
Options- A. Diastase
- B. Maltase
- C. Invertase
- D. Zymase Discuss
- 9. 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
- 10. Which of the following is an Organic Molecule?
Options- A. Nitrogen gas
- B. Ammonia
- C. Fructose
- D. Water Discuss
Chemistry problems
Search Results
Correct Answer: high energy electromagnetic
Correct Answer: protons and neutrons
Correct Answer: nucleus
Correct Answer: chromic acid
Explanation:
Passivity of iron is due to formation of an extremely thin and impervious film of ferrosoferric oxide on the surface of iron. Chromic acid, being a powerful oxidising agent (like nitric acid ) renders iron passive.
Correct Answer: Red and Blue
Correct Answer: different
Correct Answer: Tritium
Correct Answer: Zymase
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: Fructose
Explanation:
Fructose 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.
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