For a zero order reaction,the plot of concentration $(a - x)$ $vs$ time is linear with

$A$ reaction $2A \to$ products is found to follow zero order kinetics,then

Which of the following statements about zero order reaction is not true?

$A \rightarrow B$
The above reaction is of zero order. The half-life of this reaction is $50 \ min$. The time taken for the concentration of $A$ to reduce to one-fourth of its initial value is $........... \ min$ (Nearest integer).

The time required for $100 \%$ completion of a zero order reaction is

The rate constant,$k$ of a zero order reaction $2 NH_{3(g)} \xrightarrow[1130 \ K]{Pt} N_{2(g)} + 3 H_{2(g)}$ is $y \times 10^{-4} \ mol \ L^{-1} \ s^{-1}$. The rate of formation of hydrogen (in $mol \ L^{-1} \ s^{-1}$) is