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- Question
What is the heaviest noble gas?
Options- A. krypton
- B. radon
- C. helium
- D. xenon
- Correct Answer
- radon
ExplanationThe seven elements ? helium, neon, argon, krypton, xenon, radon, and oganesson of Group 18 of the periodic table are Noble or Inert gases.
Radon is the heaviest and Helium is the lightest gases of the noble gases.
- 1. Which statement best describes electrons?
Options- A. Electrons orbit around the nucleus
- B. Electrons are composed of protons and neutrons
- C. Electrons reside in the nucleus
- D. Electrons have a positive charge Discuss
- 2. The atoms of the elements having same mass number but different atomic number are called
Options- A. Isotopes
- B. Isobars
- C. Isotones
- D. Isomers Discuss
- 3. Neutrino has
Options- A. charge +1, mass 1
- B. charge 0, mas 0
- C. charge -1,mass 1
- D. charge 0, mass 1 Discuss
- 4. Discovery of the nucleus of an atom was due to the experiment carried out by
Options- A. Bohr
- B. Rutherford
- C. Moseley
- D. Thomson Discuss
- 5. Which of the following is used to preserve specimens in the biology laboratory?
Options- A. Phenol
- B. Benzaldehyde
- C. Formaldehyde
- D. Acetic acid Discuss
- 6. What is the primary component of natural gas?
Options- A. Nitrogen
- B. Ethane
- C. Propane
- D. Methane Discuss
- 7. Which of the following is a false statement?
Options- A. As bond order increases the strength of the bond increases
- B. Bond order is proportional to the bond length
- C. Molecules with negative bond order are highly unstable
- D. Bond order is inversely proportional to the bond length Discuss
- 8. Which one of the following laws explain the formation of carbon monoxide and carbon dioxide from carbon and oxygen.......
Options- A. Law of conservation of mass
- B. Law of multiple proportion
- C. Law of reciprocal proportions
- D. Law of definite proportions Discuss
- 9. Which one phosphorylates ADP to make ATP? Discuss
- 10. Which of the following carbohydrates is a polysaccharide?
Options- A. Fructose
- B. Cellulose
- C. Glucose
- D. Sucrose Discuss
Chemistry problems
Search Results
Correct Answer: Electrons orbit around the nucleus
Explanation:
Electrons orbit around the nucleus is correct about them.
Correct Answer: Isobars
Correct Answer: charge 0, mas 0
Correct Answer: Rutherford
Correct Answer: Formaldehyde
Explanation:
A 40% solution of Formaldehyde known as Formalin is used in the preservation of biological specimens because of its hardening action on proteins.
Correct Answer: Methane
Explanation:
Natural gas is primarily composed of methane, but also contains ethane, propane, and heavier hydrocarbons.
Natural gas is a colorless, tasteless, odorless, and non-toxic gas. Because it is odorless, mercaptan is added to the natural gas, in very small amounts to give the gas a distinctive smell of rotten eggs. This strong smell can alert you of a potential gas leak.
It also contains small amounts of nitrogen, carbon dioxide, hydrogen sulphide and trace amounts of water.
Correct Answer: Bond order is proportional to the bond length
Explanation:
Bond order is proportional to the bond length is a False statement since Bond order is inversely proportional to the bond length.
Correct Answer: Law of multiple proportion
Correct Answer: ATP synthase Phosphorylates ADP to make ATP
Correct Answer: Cellulose
Explanation:
Carbohydrates are also called as saccharides are molecular compounds made from just three elements:
carbon, hydrogen and oxygen.
Carbohydrates are:
* a source of energy for the body e.g. glucose and a store of energy, e.g. starch in plants
* building blocks for polysaccharides (giant carbohydrates), e.g. cellulose in plants and glycogen in the human body
* components of other molecules eg DNA, RNA, glycolipids, glycoproteins, ATP
Types:
1. Monosaccharides (e.g. glucose) and
2. Disaccharides (e.g. sucrose) are relatively small molecules. They are often called sugars.
3. Other carbohydrate molecules are very large called Polysaccharides such as starch and cellulose.
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