Which ion forms a hydroxide highly soluble in water?
(b) Alkali metal hydroxides are 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:
(c) Violet colour to flame is characteristic of potassium. Also aqueous solution of K2CO3 is alkaline.
Strongest reducing agent among the following is:
(a) Alkali metals are strongest reducing agents. Also, their reducing power increases down the group.
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
(c) NaOH absorbs moisture and CO2 from air to form Na2CO3,
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:
(d) It is chemical formula of Hypo.
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
(c) It is a fact.