Dilute trioxonitrate (V) acid does not produce hydrogen when it reacts with metals because
it reacts with the product.
it is highly corrosive.
there is no visible reaction.
it is a strong oxidizing agent.
Correct answer is D
Dilute trioxonitrate (V) acid does not produce hydrogen when it reacts with metals because it is a strong oxidizing agent.
Trioxonitrate (V) acid, also known as nitric acid, is a strong oxidizing agent. This means that it can easily oxidize metals, which means that it can remove electrons from metals. When nitric acid oxidizes a metal, it forms salt and water. The salt does not contain hydrogen, so no hydrogen gas is produced
Which of the following properties does not give evidence of the kinetic theory of matter?
Diffusion
Melting
Polymerization
Evaporation
Correct answer is C
Polymerization is a process in which small molecules combine to form larger molecules. This process is not consistent with the kinetic theory of matter because it does not involve the movement of particles. The particles in a polymer are not moving randomly. They are bonded together in a fixed structure.
Therefore, the property that does not give evidence of the kinetic theory of matter is polymerization.
Which of the elements in the table below would react more readily with chlorine?
|
Element |
Ionization energy (KJ \(mol^{-1} \times 10^{-3}\)) |
| W | 12.0 |
| X | 21.0 |
| Y | 106.0 |
| Z | 200.0 |
Y and Z only
X and Z only
W and X only
W and Z only
Correct answer is C
Among the given elements, W has the lowest ionization energy (\(12.0 KJ mol^{-1} x 10^{-3})\), indicating that it would be more likely to react with chlorine. X has a higher ionization energy \((21.0 KJ mol^{-1} x 10^{-3})\), so it would be less reactive with chlorine compared to W.
Based on ionization energy values, the elements that would react more readily with chlorine are W and X.
The formation of a bond between hydrogen and a highly electronegative atom results in
polarity
electrovalent bond.
dipole
metallic bond
Correct answer is A
The formation of a bond between hydrogen and a highly electronegative atom results in polarity because the electronegative atom will attract the shared pair of electrons more than the hydrogen atom, creating a dipole with a partial negative charge on the electronegative atom and a partial positive charge on the hydrogen atom.
Alkenes can be manufactured by
the combustion of alkanes.
the cracking of hydrocarbons.
polymerization reactions.
addition of hydrogen to unsaturated vegetable oils.
Correct answer is B
Cracking is a chemical process in which larger hydrocarbon molecules are broken down into smaller and more useful ones. This process is commonly used in petroleum refining to convert heavy hydrocarbons into lighter fractions, including alkenes. During cracking, high-temperature and/or catalytic conditions are applied to break the long carbon chains of hydrocarbons into shorter ones. This process produces a mixture of products, including alkenes, which are unsaturated hydrocarbons containing carbon-carbon double bonds.