CBSE
Multiple Choice QuestionsWhich phosphorus reacts with KOH solution to produce phosphene gas?
White phosphorus
Red phosphorus
Both (a) and (b)
None of these
I2 dissolves in KI solution due to the formation of :
KI2 and I-
K+, I- and I2
I
None of these
What are the products obtained when ammonia is reacted with excess chlorine ?
N2 and NCl3
N2 and HCl
N2 and NH4Cl
NCl3, and HCl
When KI is added to acidified solution of sodium nitrite, then
NO gas is liberated and I2 is set free
N2 gas is liberated and HI is produced
N2O gas is liberated and I2 is set free
N2 gas is liberated and HOI is produced
Short Answer TypeGive the structure of pyrphyuric acid. How would you prepare it? What would you observe when colourless HI is added to pyrphuric acid ?
Multiple Choice QuestionsPCl3 and cold water reacts to produce which of the following?
H3PO3
H3PO2
H4P2O7
H3PO4
Which of the following electronic configuration represents noble gas ?
ns2np6
ns2np5
ns2np4
ns2np3
Which of the following is used in the treatment blood cancer ?
I131
P32
Rn
I127
Ferrous sulphate () is known as
vermillion
Glauber's salt
green vitriol
Siderite
Which one of the following pairs is obtained on heating ammonium dichromate?
N2 and H2O
N2O and H2O
NO2 and H2O
NO and NO2
