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- Question
Alveoli is related to which of the following system of human body?
Options- A. Circulatory system
- B. Excretory system
- C. Reproductive system
- D. Respiratory system
- Correct Answer
- Respiratory system
- 1. A by product of involuntary muscle contraction and relaxation is
Options- A. Oxygen
- B. Water
- C. Heat
- D. Nitrogen Discuss
- 2. Melvin calvin got Noble Prize for his studies on
Options- A. Light reaction
- B. Plant hormones
- C. Carbon fixation
- D. Photons Discuss
- 3. What is the full form of PVC?
Options- A. Phosphonil vinyl Carbonate
- B. Polyvinyl S Carbonate
- C. Polyvinyl Carbonate
- D. Polyvinyl Chloride Discuss
- 4. In the structure of planet Earth ,below the mantle, the core is mainly made up of which one of the following
Options- A. Aluminium
- B. Chrromium
- C. Iron
- D. Silicon Discuss
- 5. East African Valleys, streching from East Africa through Red Sea to Syria is an example of
Options- A. river valley
- B. rift valley system
- C. glaciated valley
- D. a canyon Discuss
- 6. "The Republic" was written by whom?
Options- A. Plato
- B. Aristotle
- C. Pythagoras
- D. Socrates Discuss
- 7. Which author published 59 new books in 1955?
Options- A. Mark Twain
- B. Ernest Hemingway
- C. Enid Blyton
- D. Stephen King Discuss
- 8. Plants are green because they
Options- A. Refract green light
- B. Absorbs green light
- C. Reflects green light
- D. Do not absorb ultra violet light Discuss
- 9. The mass of a mole of NaCl is the
Options- A. 58.44 gm/mol
- B. 57.25 gm/mol
- C. 56.31 gm/mol
- D. 59.14 gm/mol Discuss
- 10. Aromatic hydrocarbons contain at least _____ benzene like ring in their molecules.
Options- A. 4
- B. 3
- C. 2
- D. 1 Discuss
More questions
Correct Answer: Heat
Correct Answer: Carbon fixation
Correct Answer: Polyvinyl Chloride
Correct Answer: Iron
Correct Answer: rift valley system
Explanation:
A rift valley is formed either due to upheaval of blocks on either sides of a fracture or due to subsidence of block between them.
Correct Answer: Plato
Correct Answer: Enid Blyton
Correct Answer: Reflects green light
Correct Answer: 58.44 gm/mol
Explanation:
To get the mass of a mole of NaCl, we need to add the molar atomic weights of the individual elements i.e, Na and Cl
Atomic weights of Na = 22.99 gm/mol Cl = 35.45 gm/mol
Now, mass of a mole of NaCl = 22.99 + 35.45 = 58.44 gm/mol.
Correct Answer: 1
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