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- Question
1 Mole of CO2 mass is
Options- A. 32 gms
- B. 44 gms
- C. 16 gms
- D. 12 gms
- Correct Answer
- 44 gms
ExplanationWe know that,
Mass of Carbon = 12 gms
Mass of Oxygen = 16 gms = O2 => 16 * 2 = 32 gms
=> Mass of 1 mole of CO2 = 12 + 32 = 44 gms.
- 1. The reduction potential of hydrogen half-cell will be negative if : (1) PH2 = 2 atm and [H+] = 2.0 M (2) PH2 = 1 atm and [H+] = 2.0 M (3) PH2 = 1 atm and [H+] = 1.0 M (4) PH2 = 2 atm and [H+] = 1.0 M
Options- A. Option 1
- B. Option 2
- C. Option 3
- D. Option 4 Discuss
- 2. The charge on positron is equal to the charge on
Options- A. proton
- B. electron
- C. alpha- particle
- D. neutron Discuss
- 3. Which of the following is not a subatomic particle?
Options- A. neutron
- B. ion
- C. electron
- D. proton Discuss
- 4. All of the following are constituents of RNA molecule except _____
Options- A. Thymine
- B. Adenine
- C. Uracil
- D. Guanine Discuss
- 5. Which Noble Gas has the highest First Ionization Energy?
Options- A. Neon
- B. Helium
- C. Argon
- D. Xenon Discuss
- 6. The crop that has the highest photosynthetic activity -
Options- A. Sugarcane
- B. Wheat
- C. Cotton
- D. Rice Discuss
- 7. The difference between a nuclear reactor and atomic bomb is that ___________
Options- A. no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction
- B. the chain reaction in nuclear reactor is controlled
- C. the chain reaction in nuclear reactor is not controlled
- D. no-chain reaction takes place in atomic bomb while it takes place in nuclear reactor Discuss
- 8. Positive ions are formed from neutral atoms by loss of
Options- A. neutrons
- B. protons
- C. nuclear charge
- D. electrons Discuss
- 9. The presence or absence of hydroxy group on which carbon atom of sugar differentiates RNA and DNA ?
Options- A. 4th
- B. 2nd
- C. 3rd
- D. 1st Discuss
- 10. Who is the father of modern chemistry?
Options- A. Priestley
- B. Lavoisier
- C. Dalton
- D. Mendeleeff Discuss
Chemistry problems
Search Results
Correct Answer: Option 4
Explanation:
Apply Nernst equation
Therefore E is Negative
Correct Answer: proton
Correct Answer: ion
Explanation:
The particles which makes upon an atom are called subatomic particles. Electrons, protons and Neutrons that makes an atom are called subatomic particles.
Whereas,
An ion is an atom or group of atoms in which the number of electrons is different from the number of protons.
Correct Answer: Thymine
Correct Answer: Helium
Explanation:
Helium has the highest First Ionization Energy in the Noble Gases group.
Ionization Energy ::
Ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms. Atoms are more stable when they have full valence shells.
Noble Gases have a very stable electron configuration, therefore, they have the highest amount of ionization energy within their periods. It decreases down a family because electrons farther from the nucleus are easier to remove.
Ionization Energy levels of Noble Gases group in Descending Order :: He, Ne, Ar, Kr, Xe, Rn
Correct Answer: Sugarcane
Explanation:
Corn, sugar cane, and sorghum are C4 plants. These plants are economically important in part because of their relatively high photosynthetic efficiencies compared to many other crops.
Correct Answer: the chain reaction in nuclear reactor is controlled
Correct Answer: electrons
Correct Answer: 2nd
Explanation:
RNA has hydroxy group attached at the 2nd C-atom while DNA does not.
Correct Answer: Lavoisier
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