⇒ The oxoacids of sulphur are more numerous and more important than those of Se and Te. ⇒ Many of the oxoacids of sulphur do not exist as free acids, but are known as anions and salts. ⇒ Acids ending in ous have S in the oxidation state (+IV) and form salts in -ite. ⇒ Read more about Oxoacids of Sulphur[…]
Puzzle 1: Insert the missing alphabets to complete the series. T, F, S, E, T, T, F, _, _, _, _, T, T, T, T Answer: S, E, T, T Explanation: The first “T” stands for Two. Now go on adding 2 to the series and take the first letter: Four, Six, Eight, Ten, Twelve, Read more about Brain Teasers 10 [With Answers][…]
The ability of a magnetic field to magnetize a material medium is called its magnetic intensity H. Its magnitude is measured by the number of ampere-turns flowing round unit length of a solenoid, required to produce that magnetic field. Let the field due to a solenoid of n turns per meter length be H = Read more about Magnetic Intensity (H):[…]
Teaser 1: Insert the missing alphabets to complete the series. T, F, S, E, T, T, F, _, _, _, _, T, T, T, T Teaser 2: If you are supposed to take pills at half an hour intervals, how many minutes would 5 pills last? Teaser 3: In a class test Tony scored 160 Read more about Brain Teaser 10[…]
Equation of parabola in its standard form: Let S be focus and ZZ’ be directrix of a parabola. Draw SK perpendicular from S on directrix and bisect SK at A ⇒ AS = SK Where A lies on parabola SK = 2a ⇒ SA = SK = a Let choose A be origin, AS as Read more about Standard form of Parabola and its various forms[…]
Puzzle 1: Between 4 & 5 O’clock, the time when the hands coincide is: A) 4 : 21 9/11 B) 4 : 24 3/11 C) 4 : 22 D) 4 : 23 9/11 Answer: Option ‘A’ Explanation: 4 * 30 = 120 + 0 Read more about Clock Puzzles 6 [With Answers][…]
The equation of a family of circles passing through the intersection of circles x² + y² + 2gx + 2fy + c = 0 and line L = lx + my + n = 0 is x² + y² + 2gx + 2fy + c + λ (lx + my + n) = 0 i.e., Read more about Intersection of line and circle[…]
Sulfuric acid is produced from sulfur, oxygen and water by contact process. 1. Contact Process: ⇒ Sulfur is burned to produce sulfur dioxide. S (s) + O2 (g) → SO2 (g) ⇒ This is then oxidized to sulfur trioxide using oxygen in the presence of a vanadium oxide catalyst. This reaction is reversible and the formation of the sulfur trioxide is exothermic. So Read more about Sulphuric Acid[…]
Puzzle 1: Between 4 & 5 O’clock, the time when the hands coincide is: A) 4 : 21 9/11 B) 4 : 24 3/11 C) 4 : 22 D) 4 : 23 9/11 Puzzle 2: At what angle the hands of a clock are inclined at 15 Read more about Clock Puzzles 6[…]
LENZ’S Law – The Direction of Induced E.M.F: The direction of the induced e.m.f. is given by the Russian Scientist Lenz. The direction of the induced e.m.f. is such that it opposes the cause producing the change of flux. Induced e.m.f.. This equation is called Faraday’s law of induction or Neumann’s law. The negative sign Read more about LENZ’S Law[…]