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- Question
Gold and silver are extracted from their respective ores by _______
Options- A. Smelting
- B. Roasting
- C. Leaching
- D. Hydro metallurgy
- Correct Answer
- Hydro metallurgy
- 1. Which is the gas used for making vegetables and vanaspathi from vegetable oils?
Options- A. Hydrogen
- B. Nitrogen
- C. Argon
- D. Helium Discuss
- 2. Electron configuration of cobalt 2+? Discuss
- 3. Species containing same number of electrons are called
Options- A. Isotopes
- B. Isobars
- C. Isoelectronic
- D. Isotones Discuss
- 4. Permanent hardness of water is due to the presence of ?
Options- A. Calcium sulphate
- B. Calcium bicarbonate
- C. Sodium bicarbonate
- D. Magnesium bicarbonate Discuss
- 5. Is C2 Paramagnetic or Diamagnetic?
Options- A. Paramagnetic
- B. Diamagnetic
- C. Ferromagnetic
- D. Can't be determined Discuss
- 6. 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
- 7. Which of the following is the strongest acid?
Options- A. ClCH2COOH
- B. BrCH2COOH
- C. FCH2COOH
- D. ICH2COOH Discuss
- 8. Which Noble Gas has the highest First Ionization Energy?
Options- A. Neon
- B. Helium
- C. Argon
- D. Xenon Discuss
- 9. All of the following are constituents of RNA molecule except _____
Options- A. Thymine
- B. Adenine
- C. Uracil
- D. Guanine Discuss
- 10. Which of the following is not a subatomic particle?
Options- A. neutron
- B. ion
- C. electron
- D. proton Discuss
Chemistry problems
Search Results
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: The s,p,d,f configuration for cobalt (Co) is 1s22s22p63s23p64s23d7, determined by the position of the element on the periodic table The electron configuration for Cobalt at ground state would simply be Co: [Ar] 4s23d7 The electron configuration of Cobalt will end in d block as Cobalt is an inner transition metal Cobalt is in the 7th column of the d block and therefore has 7 d electrons d7
Correct Answer: Isoelectronic
Correct Answer: Calcium sulphate
Correct Answer: Diamagnetic
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: FCH2COOH
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: Thymine
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.
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