A masking agent is a reagent used in chemical analysis which reacts with chemical species that may interfere in the analysis. Demasking is the... View Article
Answer: An ionic compound that is formed by the reaction called neutralization reaction of an acid and a base is called salt. It is composed of... View Article
The valency of the element is decided by the number of valence electrons. The calcium carbonate is CaCO3. The valency of calcium is +2 in the... View Article
Cements (e.g., Portland cement) is harden because of hydration, chemical reactions that occur independently of the mixture’s water content;... View Article
The n-factor of a dibasic acid = 2 Molarity = Normality/n-factor = 0.1/2 = 0.05 Number of moles = Molarity x Volume(in litres) = 0.05 x 0.1 =... View Article
Beating of aluminium metal to make aluminium foil is a physical change because while beating, moulding, heat pressing and fabrication process,... View Article
Zinc acetate is a salt with the formula Zn(CH3CO2)2. Antimony trioxide, used as a component in flame retardant applications. Antimony (III) oxide... View Article
Carbonated water , also known as soda water , sparkling water , or seltzer water , is plain water into which carbon dioxide gas has been... View Article
Answer: (b) 2: 1 by volume The electrolysis of water is the dissociation of water (H2O) into hydrogen gas (H2) and oxygen (O2). This hydrogen... View Article
Thermal conductivity of solid metals with rise in temperature normally decreases. Some factors are known to influence the thermal conductivity of... View Article
Answer: pH is defined as the measure of hydrogen ion concentration which is used for measuring the acidity or alkalinity of a given solution.... View Article
A source of light which gives light of several wave lengths (hence several colours) is called a polychromatic source of light. The white light is... View Article
Answer: When dilute sulphuric acid is added to sodium carbonate, the corresponding salt, sodium sulphate and water are formed and carbon dioxide... View Article
Answer: (4) Covalent and coordinate Covalent bond - Covalent bond is defined as the bond formed due to sharing of one or more number of... View Article
Distance between two plates is greater and their sizes are big in secondary cells. There is no polarization in secondary cell. Due to these cause... View Article
When a substance is heated its volume increases and as a result density decreases as intermolecular space increases. When water is heated its... View Article
In Landolt’s experiment, NaClandAgNO3 were taken in a U-Shaped tube and weighed. The tubes were tilted to let the solutions mix and react... View Article
Magnetic Separation is one of the most common and important physical separation techniques. Magnetic Separation is which separating components of... View Article
Phenol is most difficult to protonate. Due to the presence of lone pair of electrons in reasons in phenol, it will have positive charge... View Article
