Answer: White powder magnesium oxide (MgO) When magnesium ribbon is burnt in the air, it combines with oxygen to form white powder magnesium... View Article
Paralysis of Muscles, Stiff Backs, High Pulse Rates are the symptoms of Polio Polio, or poliomyelitis, is a disabling and life-threatening... View Article
The ultraviolet rays that strike the Earth result in the depletion of the ozone layer. The three categories of UV radiation are: UV-A between... View Article
In a redox reaction, both an oxidation and a reduction must occur. The substance that loses electrons is called the reducing agent or reductant.... View Article
Answer: When ethyne is burnt in the air incomplete burning takes place and produce sooty flame due to the limited supply of oxygen present in... View Article
The reaction between lead nitrate and potassium iodide is an example of a precipitation reaction. Lead nitrate reacts with Potassium iodide to... View Article
Answer: The postulate of Dalton's atomic theory resulting from the law of conservation of mass is 'The relative number and kinds of atoms are... View Article
Atomic number = Number of proton = Number of electron. So, the atomic number of the neutral element is 3. Explanation: The number of protons,... View Article
Charles's Law is about the relationship between temperature and volume in flexible containers For a fixed mass of gas at constant pressure, the... View Article
The amplitude of S.H.M at resonance is infinite in the ideal case of zero damping. In an ideal environment where there is no resistance to... View Article
When the temperature goes up, the pressure inside a rigid container will go up. In a closed system where volume is held constant, there is a... View Article
Respiration in living things and burning are the important uses of oxygen gas. Oxygen gas in the atmosphere is essential for respiration.... View Article
The temperature at which a liquid changes into its gaseous form is called the boiling point. The boiling point is the temperature at which a... View Article
The calorimeter is commonly made up of Copper because the specific heat capacity of copper is low. Hence, it will absorb a small amount of heat... View Article
Locking chlorine monoxide and chlorine-free radicals are called scavenging. The reactive species in the stratosphere layer locked up the... View Article
The mass of an atom of hydrogen is equivalent to 1/12 the mass of a carbon atom. An atomic mass unit (AMU) is defined as a mass equal to the... View Article
Acids turn blue litmus red, whereas Bases turn red litmus blue. One of the first indicators used for determining the pH of an aqueous solution... View Article
The bigger crystals of sodium chloride break up into smaller ones producing a crackling sound called decrepitation. When the crystals are... View Article