Why Be is not readily attacked by acids?
Answer: Beryllium (Be) is not readily attacked by acids because of the presence of an oxide film on the surface of... View Article
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What is the hybridisation of Xe in XeO3?
Answer: Hybridization is defined as the concept of mixing two atomic orbitals with the same energy levels to give a... View Article
Why do seeds swells when placed in water?
Answer: The seeds swell when placed in water because of imbibition. Imbibition is the process when solid surfaces absorb water... View Article
Why is the use of iodized salt advisable?
Iodine is needed by the thyroid gland for the production of the thyroxine hormone. This hormone regulates fat, protein and... View Article
Why are yeast cells used to produce wine?
Answer: Yeast cell converts glucose into ethyl alcohol. The most significant distinction between wine and grape juice is the role of... View Article
Which of the following nitrogen base is not found in DNA? (1) Thymine (2) Cytosine (3) Guanine (4) Uracil
Answer: (4) Uracil Nucleotide monomers make up DNA. A nitrogenous base is bound to the deoxyribose sugar with the phosphate moiety... View Article
Give an example of substitution reaction.
A substitution reaction is also called a single displacement reaction, single replacement reaction, or single substitution reaction. The reactions in... View Article
Give an example of a tertiary haloalkane.
Answer: Haloalkanes are the hydrocarbons in which one or more hydrogen atoms have been replaced with halogen atoms. Haloalkanes are commonly referred... View Article
Give an example of a parasitic protozoan.
Answer: Protozoa are unicellular eukaryotic organisms. They are heterotrophic. They may be free-living or parasitic. A single cell performs all... View Article
Give an example of a non-ferrous mineral.
Answer: A mineral is a naturally occurring substance, representable by a chemical formula, that is usually solid and inorganic, and... View Article
Give an example of a gamosepalous flower.
The calyx is the outermost whorl of a flower. It comprises sepals, tiny leaves present at the base of a... View Article
Name the most stable ion and explain why.
Answer: Tertiary carbonium ions are the most stable due to hyperconjugation effect and +I effect of methyl group. Carbocations The... View Article
Which is the nearest planet to the Earth?
Answer: Mercury is the nearest planet to the Earth. Mercury is the nearest planet to the Sun. And then Venus is... View Article
What is the formula for gold (III) sulfide?
Answer: The formula for Gold(III) sulfide is Au2S3. The proposed compound gold(III) sulphide has the formula (Au2S3). There haven’t been... View Article
What happens when you add sugar to water?
Answer: As the sugar dissolves in water, the crystals break down, releasing tiny particles. Sugar particles pass through the holes... View Article
What happens when a liquid becomes a gas?
Answer: When a liquid changes to gas, the particles absorb heat energy and they start vibrating faster and distance between... View Article
What does the pitch of a screw represent?
Answer: The pitch of a screw reflects the linear distance traversed by the screw in one complete rotation. Pitch is... View Article
Who gave the law of conservation of mass?
Answer: Antoine Lavoiser gave the law of conservation of mass. Law of conservation of mass The law of conservation of... View Article
How is rabies caused? Is it a viral fever?
Answer: Rabies is a viral disease that is spread through the animal bite such as the dog. It is caused... View Article
What is the purity of pure gold in carat?
Pure gold is 24 carats. It is very soft so, it cannot be used for making jewellery. Hence, it is... View Article
