Soft heavy metal melts at ${30\,^o}C$ and is used in making heat sensitive thermometers the metal is
Soft heavy metal melts at ${30\,^o}C$ and is used in making heat sensitive thermometers the metal is
- A
Galium
- B
Sodium
- C
Potassium
- D
Caesium
Similar Questions
For the electrolytic production of aluminium, $(i)$ the cathode and $(ii)$ the anode are made of
For the electrolytic production of aluminium, $(i)$ the cathode and $(ii)$ the anode are made of
Boron cannot form which one of the following anions ?
Boron cannot form which one of the following anions ?
- [AIEEE 2011]
Mention isotops of boron.
Mention isotops of boron.
Assertion : Coloured cations can be identified by borax bead test.
Reason : Transparent bead $(NaBO_2 + B_2O_3)$ forms coloured bead with coloured cation.
Assertion : Coloured cations can be identified by borax bead test.
Reason : Transparent bead $(NaBO_2 + B_2O_3)$ forms coloured bead with coloured cation.
- [AIIMS 2009]
Boron fluoride exists as $BF_3$ but boron hydride doesn't exist as $BH_3$ . Give reason. In which form, does it exist ? Explain its structure.
Boron fluoride exists as $BF_3$ but boron hydride doesn't exist as $BH_3$ . Give reason. In which form, does it exist ? Explain its structure.