What is the actual molecular mass of chlorine?
Answer: 1 atom of Chlorine weight = 35.453amu The formula of one molecule of chlorine = Cl2 ∴ The molecular... View Article
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What is tincture of iodine? What is its use?
Answer: Iodine tincture also known as weak iodine solution is a combination of iodine, sodium iodide, ethanol, and water. It... View Article
Which shells are called penultimate and prepenultimate shells?
Answer: The electrons are distributed in an atom within the various shells around the nucleus. The last nucleus shell or... View Article
The pH of 10−8M HCl solution is: (1) 8 (2) 1 (3) Close to 7 (4) 0
Answer: (3) HCl is a strong acid. All acids have a pH in the acid range, that is to say... View Article
Illustrate the lock and key hypothesis of enzyme action.
Answer: Enzymes can be defined as biological polymers that catalyze biochemical reactions. Enzymes are a linear chain of amino acids... View Article
What is the botanical name of Tulsi Plant
Answer: The scientific name of Tulsi plant or holy basil is Ocimum tenuiflorum or Ocimum sanctum which belongs to the... View Article
Explain why the sliding friction is less than the static friction.
Answer: Friction is defined as the force that opposes the motion of a solid object over another. The sliding friction... View Article
Define atomic size. How does it vary in a period and in a group ?
Answer: Atomic size is the distance between the centre of the nucleus of an atom and its outermost shell and... View Article
What is the lifespan of a parrot?
Lifespan is the period from birth to death. There is a various number of parrots seen in the world. Each... View Article
Calcium phosphate is present in tooth enamel, its nature is (1) Acidic (2) Basic (3) Neutral (4) Amphoteric
Answer: (2) Basic Calcium phosphate is basic salt since it is a source of weak phosphoric acid and a slightly... View Article
What are allotropes? Sketch the structure of two allotropes of carbon namely diamond and graphite. What is the impact of structure on physical properties of two allotropes?
Answer: The word allotrope refers to one or more physical forms of a chemical substance that exist in the same... View Article
Which one is called graveyard of RBC’s? (1) Liver (2) Kidney (3) Heart (4) Spleen
Answer: (4) Spleen has a similar structure to a large lymph node, which primarily functions as a blood filter. The... View Article
One unit of electric energy is equal to (1) One kilowatt hour (2) One watt hour (3) 100 joules (4) None of the above
Answer: (1) 1 unit of electric energy is equal to a 1-kilowatt hour. 1unit = 1kWh.
State Henry’s law and mention some important applications?
Answer: Henry’s law is a gas law that states that the amount of gas that is dissolved in a liquid... View Article
What are lyophilic and lyophobic sols? Which of these sols can be easily coagulated on addition of small amounts of electrolytes?
Answer: Lyophilic sols When sols are produced directly by mixing substances in an effective dispersing medium are called lyophilic sols.... View Article
Why is ice at 273 K more effective in cooling than water at the same temperature?
Answer: To achieve room temperature, the ice at 273 K will absorb latent heat as well as thermal energy. Water... View Article
The dispersed phase and dispersion medium of fog respectively are (1) Solid, liquid (2) Liquid, liquid (3) Liquid, gas (4) Gas, liquid
Answer: (3)Liquid, gas Dispersed phase A liquid that is suspended in the form of fine droplets in a continuous phase.... View Article
Nissl granules are formed from (1) PER (2) SER (3) DNA (4) Golgi bodies
Answer: (1) Nissl’s Granules are the substances found in the neurons which are a large granular type of body. The... View Article
Extrusion of second polar body from egg nucleus occurs (1) After entry of sperm and before completion of fertilization (2) After completion of fertilization (3) Before the entry of sperm (4) Without any relation with sperm entry
Answer: (1) Once the sperm enters the ovum it allows the secondary oocyte to ‘meiotic split’. The sperm entry causes... View Article
Phenols are more acidic than alcohols. Explain why?
Answer: Phenols react with aqueous sodium hydroxide to produce phenoxide ions. This indicates that the acidity of phenols is higher... View Article
