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- Question
The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 at 27°C is to a volume of 100 dm3
Options- A. 42.3 J/ mole / K
- B. 38.3 J/ mole / K
- C. 35.8 J/ mole / K
- D. 32.3 J/ mole / K
- Correct Answer
- 38.3 J/ mole / K
Explanation= =
- 1. Boron cannot form which one of the following anions? (1) BO2- (2) BF63- (3) BH4- (4) B(OH)4-
Options- A. Option 1
- B. Option 2
- C. Option 3
- D. Option 4 Discuss
- 2. Electromagnetic radiation with maximum wavelength is
Options- A. ultraviolet
- B. radio waves
- C. x-rays
- D. infrared Discuss
- 3. The nitrogen atom has 7 protons and 7 electrons,The nitride ion will have
Options- A. 10 protons and 7 electrons
- B. 7 protons and 10 electrons
- C. 4 protons and 7 electrons
- D. 4 protons and 10 electrons Discuss
- 4. In known elements, the maximum number is of
Options- A. Metals
- B. Non Metals
- C. Metalloids
- D. None of these Discuss
- 5. What is the element present in urea
Options- A. C,H,O
- B. C,N,O
- C. C,N,H
- D. C,O,N,H Discuss
- 6. The bleeding of a wound is stopped by the application of ferric chloride because_____
Options- A. Ferric chloride seals the blood vessels
- B. Blood starts flowing in the opposite direction
- C. Blood reacts and a solid is formed which seals the blood vessels
- D. Blood is coagulated and the blood vessels are sealed Discuss
- 7. Which gas is known as "Fuel of Future" ?
Options- A. Methane
- B. Oxygen
- C. Neon
- D. Hydrogen Discuss
- 8. Which of the Following is an Amorphous solid?
Options- A. Quartz Glass(Sio2)
- B. Chrome Alum
- C. Silicon Carbide(SiC)
- D. Graphite Discuss
- 9. Natural Rubber is a Polymer of
Options- A. butadiene
- B. 2methyl-1,3butadiene
- C. ethylene
- D. isoprene Discuss
- 10. ATP stands for -
Options- A. Adenosine triphosphate
- B. Alanine triphosphate
- C. Adrenalin triphosphate
- D. Asparagine triphosphate Discuss
Chemistry problems
Search Results
Correct Answer: Option 2
Explanation:
Due to absence of low lying vacant d orbital in B, hybridization is not possible hence will not formed.
Correct Answer: radio waves
Correct Answer: 7 protons and 10 electrons
Correct Answer: Metals
Correct Answer: C,O,N,H
Correct Answer: Blood is coagulated and the blood vessels are sealed
Correct Answer: Hydrogen
Explanation:
Because of its being pollution free and combustion efficient, Hydrogen gas is called fuel of future. Because of its origin in marshy places, Methane is called as 'Marsh Gas'.
Correct Answer: Quartz Glass(Sio2)
Explanation:
An amorphous or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal. In Brief, An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel.
Quartz glass (SiO2) is an amorphous solid due to its short range order of constituent particles. Note Quartz is a crystalline solid while quartz glass is an amorphous solid.
Correct Answer: isoprene
Correct Answer: Adenosine triphosphate
Explanation:
Adenosine triphosphate (ATP) is a nucleotide which is also called as nucleoside triphosphate is a small molecule used in cells as a coenzyme. It is often referred to as the "molecular unit of currency" of intracellular energy transfer. ATP transports chemical energy within cells for metabolism. Most of the cellular functions need energy in order to be carried out such as synthesis of proteins, synthesis of membranes, movement of the cell, cellular division, transport of various solutes etc. The ATP is the molecule that carries energy to the place where the energy is needed. When ATP breaks into ADP (adenosine diphosphate) and Pi (phosphate), the breakdown of the last covalent link of phosphate liberates energy that is used in reactions where it is needed.
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