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Characteristic flame colour: specific metals and their salts impart particular colours to Bunsen burner flame.
(1) Pb (plumbum) impart pale greenish colour to the flame.
(2) Cu and Cu salts impart blue or green colour to the flame.
(3) Borates as well impart green colour to the flame.
(4) Ba and its salts impart apple green colour to the flame.
(5) Sr imparts crimson red colour to the flame.
(6) Ca imparts brick red colour to the flame.
(7) Na imparts yellow colour to the flame.
(8) K imparts pink-violet (Lilac) colour to the flame.
(9) Li imparts crimson-red, Rb imparts violet and Cs imparts violet colours to the flame.
(10) Livid- blue flame is given by As, Sb and Bi.
Another way to show that water pressure increases with depth Search a tall tin can. Punch holes up the side of the can about 3 cm apart. Put a strip of adhesive or plastic tape
The nucleus of an element contains 9 protons. Its valency would be : (1) 1 (2) 3 (3) 2 (4) 5 Ans: 1
Be's 4th electron will have four quantum numbers: n l m s (1) 1 0 0 +1/2 (2) 1 1 +1 +1/2
The third line in Balmer series corresponds to an electronic transition between which Bohr's orbits in hydrogen: (1) 5 → 3 (2) 5 → 2 (3) 4→ 3
internal conditioning methods
Upward and downward pressure are the same at any given depth Get a glass cylinder at least 15 cm long and 4 cm in diameter. Such a length of tube can be made from a straight-si
Determine the molality of an aqueous solution that is 12.0 percent urea by mass
The number of orbitals in 2p sub-shell is : (1) 6 (2) 2 (3) 3 (4) 4 Ans: 3
nitroalkane sare acidic in nature.Explain
why it is called microcosmic salt???
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