What are the differences between autotrophic nutrition and heterotrophic nutrition?
Nutrition is defined as the process of taking in food and converting it into energy and to other important nutrients... View Article
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Arrange the following in the decreasing order: ClCH2COOH, Cl3CCOOH, CH3COOH, Cl2CHCOOH
The greater the number of electron-withdrawing substituents, the greater the dispersal of the negative charge and hence stronger will be... View Article
Convert the following temperatures to the Kelvin scale. (a) 25°C (b) 373°C
Answer: Celsius and Kelvin are two scales used to measure temperature. Both follow the same unit difference between each scale... View Article
Which of the following cation does not exist? a) NH4+ b) H+ c) ScO2+ d) H3O+
ScO2+ does not exist. Cations and anions A cation is an ion that has lost one or more electrons, gaining... View Article
What does the antacids used for the treatment of indigestion in the stomach contain?
The pH of our digestive system is acidic due to the presence of HCl. Antacids are bases that give relief... View Article
Give three examples of the range of variations that you see in life-forms around you.
Examples of the range of variations observed in daily life are: Organisms vary greatly in size, from microscopic bacteria to... View Article
According to Lother Meyer, how should we arrange the elements in the increasing order.
Lothar Meyer proposed that on arranging the elements to increase atomic weights, similarities appear in physical and chemical properties. Meyer... View Article
Which gastrointestinal disease is caused by the bacteria present in the human excreta?
Escherichia coli causes gastrointestinal diseases. What are gastrointestinal infections? There are several bacteria, viruses, and parasites that cause gastrointestinal (GI)... View Article
What part of the ear converts sound waves into mechanical vibrations?
The sound waves enter the ear through the pinna and auditory canal and reach the tympanum or eardrum, where they... View Article
Write a note on how forests influence the quality of our air, soil and water resources
Forests help purify and increase the oxygen content in the air by absorbing carbon dioxide and releasing oxygen. It maintains the... View Article
Which of the following substances is not combustible? a) Lead b) Petrol c) Sodium d) Paper
Lead cannot burn in oxygen or air. Thus, it is a non-combustible substance. Combustible and non-combustible substances A combustible material... View Article
Which of the following has a square pyramidal shape? (a) XeOF4 (b) XeO3F2 (c) XeOF2 (d) XeO2F2
XeOF4 has a square pyramidal. XeOF4 The Central atom: Xe Xe contributes: 8 e− O contributes: 6 e− 4 ×... View Article
What is the structure into which the graafian follicle develops after ovulation called?
It develops into a yellowish body called corpus luteum, which means yellow body. This then starts producing progesterone while continuing to... View Article
What precaution should be taken to avoid the overloading of domestic electric circuits?
Answer: A continuous and closed path of an electric current is called an electric circuit. An electric circuit consists of electric... View Article
What is the function of an earth wire? Why is it necessary to earth metallic appliances?
The metallic body of electric appliances is connected to the earth using earth wire so that any leakage of electric... View Article
Which of the following will not conduct electricity? a) Ionic compounds b) Metals c) Water
Option (a) Ionic compounds Ionic compounds in the solid-state do not conduct electricity because ions in the solid are not... View Article
Which of the following is a plant hormone? (A) Insulin (B) Thyroxin (C) Oestrogen (D) Cytokinin.
Correct Option: D-Cytokinin Cytokinins and their function Cytokinins were originally defined as chemicals that induce cell proliferation and trigger callus... View Article
How does the reducing character of hydrides of group 15 elements vary in periodic table?
The reducing character of hydrides of group 15 elements increases from top to bottom because the E-H strength (Here E=... View Article
The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
Given that, Frequency = 100 Hz Therefore, the source of sound vibrates 100 times in one second. Therefore, number of... View Article
What are the necessary conditions for autotrophic nutrition and what are its by-products?
Autotrophic nutrition takes place through the process of photosynthesis. Carbon dioxide, water, chlorophyll pigment, and sunlight are the necessary conditions... View Article
