Alkali metal with the lowest melting point is -
1. Na
2. K
3. Rb
4. Cs
The incorrect statement about alkali metals is -
1. They have low density.
2. They have high ionization enthalpy.
3. They are highly reactive.
4. They show photoelectric effect.
The oxidation state of sodium in Na2O2 is -
1. +1
2. -1
3. 0
4. +2
Beryllium and Magnesium do not impart color in flame test, because -
1. Be and Mg have high Ionization Energy.
2. Be and Mg have low Ionization Energy.
3. Be and Mg radiate energy in the Infra-Red region.
4. Be and Mg have a high radius.
Lithium salts are generally hydrated because they have :
1. High polarizing power.
2. High ionization enthalpy.
3. High electronegativity.
4. Low polarizing power.
The incorrect statement among the following regarding alkaline earth metals is :
1. | Alkaline earth metals are silvery-white, lustrous, and harder than alkali metals. |
2. | Only Ca, Sr, Mg, and Ba give a flame test. |
3. | Alkaline earth metals have high electrical, and thermal conductivities. |
4. | All alkaline earth metals react with halogen and form metal halides, with the general formula MX2 . |
The incorrect statement among the following is-
1. | Ionisation enthalpy of alkaline earth metals is higher than alkali metals. |
2. | Alkaline earth metal oxides are more basic than alkali metal oxides. |
3. | Alkaline earth metal hydroxides are less basic and less stable than alkali metal hydroxides. |
4. | Solubility of Alkaline earth metals and alkali metal hydroxide increases down the group. |