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- Question
All of the following are constituents of RNA molecule except _____
Options- A. Thymine
- B. Adenine
- C. Uracil
- D. Guanine
- Correct Answer
- Thymine
- 1. Which Noble Gas has the highest First Ionization Energy?
Options- A. Neon
- B. Helium
- C. Argon
- D. Xenon Discuss
- 2. Which of the following is the strongest acid?
Options- A. ClCH2COOH
- B. BrCH2COOH
- C. FCH2COOH
- D. ICH2COOH Discuss
- 3. The Kinetic energy of gas molecules
Options- A. is unaffected by temperature variations
- B. decreases with increase of temperature
- C. increases with decrease of temperature
- D. increases with increase of temperature Discuss
- 4. Gold and silver are extracted from their respective ores by _______
Options- A. Smelting
- B. Roasting
- C. Leaching
- D. Hydro metallurgy Discuss
- 5. Which is the gas used for making vegetables and vanaspathi from vegetable oils?
Options- A. Hydrogen
- B. Nitrogen
- C. Argon
- D. Helium Discuss
- 6. Which of the following is not a subatomic particle?
Options- A. neutron
- B. ion
- C. electron
- D. proton Discuss
- 7. The charge on positron is equal to the charge on
Options- A. proton
- B. electron
- C. alpha- particle
- D. neutron Discuss
- 8. 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
- 9. 1 Mole of CO2 mass is
Options- A. 32 gms
- B. 44 gms
- C. 16 gms
- D. 12 gms Discuss
- 10. The crop that has the highest photosynthetic activity -
Options- A. Sugarcane
- B. Wheat
- C. Cotton
- D. Rice Discuss
Chemistry problems
Search Results
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: FCH2COOH
Correct Answer: increases with increase of temperature
Explanation:
Kinetic Energy or
, Where 'm' is the mass and 'v' is the velocity of molecules.
Velocity is proportional to temperature. Hence, KE is proportional to temperature and would increase with temperature.
Correct Answer: Hydro metallurgy
Correct Answer: Hydrogen
Explanation:
Hydrogen gas is used for making vegetables and vanaspathi from vegetable oils.
As it is colourless, odourless, tasteless, flammable gaseous substance, it is added to oils to make them more solid or spreadable.
The use of hydrogenation helps to prolong the shelf life of the food and maintain flavour stability.
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: proton
Correct Answer: Option 4
Explanation:
Apply Nernst equation
Therefore E is Negative
Correct Answer: 44 gms
Explanation:
We 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.
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.
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