Which ion forms a hydroxide highly soluble in water?
What would you observe if excess of dilute NaOH solution is added and shaken with an aqueous solution of aluminium chloride?
(a) A permanent white precipitate is formed immediately
(b) No change at first but a white precipitate is formed on standing
(c) A white precipitate is formed which later dissolves
(d) A green precipitate which turns red on standing in air
A colourless salt gives violet colour to Bunsen flame and also turns moistured litmus paper blue. It Is:
Strongest reducing agent among the following is:
When crystal of caustic soda is exposed to air, a liquid layer is deposited because:
(a) crystal melts
(b) crystal loses water
(c) crystal absorbs moisture and CO2
(d) crystal sublimes
Which one of the following is formed on dissolving I2 in aqueous solution of KI ?
Which of the following statements is correct for CsBr3?
(a) it is a covalent compound
(b) It contains Cs2+ and Br- ions
(c) It contains Cs+, Br- and Br2 lattice molecules
(d) It contains Cs+ and ions
Hypo is chemically:
If NaOH is added to an aqueous solution of Zn2+ ions, a white precipitate appears and on adding axcess NaOH, the precepitate dissolves. In this solution zinc exists in the:
(a) cationic part
(b) anionic part
(c) both in cationic and anionic parts
(d) there is no zinc left in the solution
Brine is chemically:
(a) conc. solution of Na2CO3
(b) conc. solution of Na2SO4
(c) conc. solution of NaCl
(d) conc. solution of alum