Highly soluble hydroxide in water is formed by -
1. Ni2+
2. K+
3. Zn2+
4. Al3+
What would you observe if excess of dilute NaOH solution is added and shaken with an aqueous solution of aluminium chloride?
1. A permanent white precipitate is formed immediately
2. No change at first but a white precipitate is formed on standing
3. A white precipitate is formed which later dissolves
4. 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:
1. Na2CO3
2. KNO3
3. K2CO3
4. Cu(OH)2
Which one of the following is formed on dissolving I2 in aqueous solution of KI ?
1. KIO4
2. KIO
3. KI3
4. KIO3
Hypo is chemically:
1. Na2S2O3.2H2O
2. Na2S2O3.3H2O
3. Na2S2O3.4H2O
4. Na2S2O3.5H2O
Sodium reacts with water less vigorously than potassium because:
1. it has higher atomic weight
2. it is less electropositive
3. it is more electronegative
4. it is metal
Molecular formula of Glauber's salt is :
1. MgSO47H2O
2. CuSO45H2O
3. FeSO47H2O
4. Na2SO410H2O
An alkali metal that reacts with nitrogen to form nitride is -
1. Li
2. Na
3. Cs
4. None of the above.
Which is industrially prepared by the electrolysis of aqueous NaCl?
1. Na2CO3
2. NaHCO3
3. NaOH
4. NaOCl
Tin dissolves in boiling caustic soda solution because of the formation of soluble:
1. Sn(OH)2
2. Sn(OH)4
3. Na2SnO3
4. none of these
The pair of compounds which cannot exist together in solution is:
1. NaHCO3 and NaOH
2. Na2CO3 and NaHCO3
3. Na2CO3 and NaOH
4. NaHCO3 and NaCl
Sodium burns in dry air to give:
1. Na2O
2. Na2O2
3. NaO
4. Na3N
The raw materials in Solvay process are:
1. NaOH, CaO and NH3
2. Na2CO3, CaCO3, and NH3
3. Na2SO4, CaCO3 and NH3
4. NaCl, NH3, CaCO3
When sodium metal is dissolved in liquid ammonia, a blue solution is formed. The blue colour is due to:
1. solvated Na+ ions
2. solvated electrons
3. solvated ions
4. solvated protons
Sodium does not form Na2+ ,because:
1. Sodium contains only one electron in its outermost shell
2. First ionization potential is small and the difference in first and second ionization potential is very large.
3. Radius of Na+2 is much smaller than of Na+
4. None of the above.