(1) (3, 12) (2) (3, ¾) (3) (3, 9) (4) none of these Solution: Let O(0, 0), A (4, 0) and B(3, 4) be the vertices of the triangle. Let H be... View Article
1) (1, 1) 2) (2, 1) 3) (1, 2) 4) (2, 2) Solution: Let the equation of line L be y = mx + c => y - mx - c = 0 The distance of a line from... View Article
1) 133 2) 190 3) 233 4) 105 Solution: Let the vertices of the triangle be O(0,0), P(0,21), and Q(21,0). The integral points must be on the... View Article
Chromium can be obtained from the electrolysis of an aqueous solution of its salt because chromium has a higher reduction potential than water.... View Article
For an oscillating system, the normal mode is when all the parts of the system move at the same time with the same frequency and with a constant... View Article
The conductivity of the acid or base depends on various other factors like the electrolyte concentration, the acidity or the basicity of the... View Article
Primary batteries are called dry batteries. These batteries carry a fixed quantity of reacting chemicals. These chemicals get exhausted over time... View Article
Geometrical isomers have the same formula but differ in the arrangement of the atoms or groups in the space. They have different chemical and... View Article
Alcohols form a hydrogen bond with water so it is soluble in water. If the molecular weight of the alcohol is higher then it is less water-soluble.... View Article
Covalent bonds are not very strong except for carbon, silicon and diamond. The metallic bonds are strong bonds. The ionic bonds are also strong... View Article
Free radicals are formed either by the metabolism process in the human body or by the external sources like the air pollutants, ozone, x-rays,... View Article
When HBr reacts with alkenes it acts as an electrophile since the pi electrons in the alkene react with the electrophilic H+ of HBr. This happens... View Article
Both corrosion and rusting are oxidation reactions. Rusting occurs only in iron objects while corrosion occurs in metals and non-metals. Rusting... View Article
Sodium chloride is formed from the reaction of a strong acid and a strong base. In the formation of sodium chloride (NaCl), HCl is neutralised by... View Article
Buffers maintain the pH value by neutralizing the acid or base added. The buffers make the acid or base weak and keep the pH value nearly constant.... View Article
Alkali earth metals are highly flammable. Their reaction will result in the release of heat and cause flames, and even releases explosive... View Article
Positional isomers are constitutional isomers, with the same carbon skeleton and will have the same functional group. They differ from each other... View Article
