Which of the following is the better method for the preparation of $BeF_2$?
- A$(NH_4)_2BeF_4 \xrightarrow{\Delta} BeF_2 + 2NH_4F$
- B$BeH_2 + F_2 \xrightarrow{\Delta} BeF_2 + H_2$
- C$Be + F_2 \xrightarrow{\Delta} BeF_2$
- D$BeO + C + F_2 \xrightarrow{\Delta} BeF_2 + CO$
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Which of the following statements is incorrect?
Medium
View SolutionThe correct order of density of $Be$,$Mg$,$Ca$,$Sr$ is
Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Barium carbonate is insoluble in water and is highly stable.
Reason $R$: The thermal stability of the carbonates increases with increasing cationic size.
Choose the most appropriate answer from the options given below for $A$ and $R$.
Assertion $A$: Barium carbonate is insoluble in water and is highly stable.
Reason $R$: The thermal stability of the carbonates increases with increasing cationic size.
Choose the most appropriate answer from the options given below for $A$ and $R$.
Which of the following elements can be represented by the electronic configuration $[Kr]\,5s^2$?
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View SolutionThe highest occupied energy level of the group $2$ elements is $7s^2$. Which of these statements is likely to be incorrect?
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