The radioactive isotope of hydrogen is:

Which element forms the maximum number of compounds in chemistry?

Which of the following is not a type of laser?

Identify the catalyst used in the reaction: $CO_2 + 2H_2 \xrightarrow{?} CH_3OH$

Complete the following reactions:
$(i) \, H_{2(g)} + M_m O_{o(s)} \xrightarrow{\Delta }$
$(ii) \, CO_{(g)} + H_{2(g)} \xrightarrow[catalyst]{\Delta }$
$(iii) \, C_3 H_{8(g)} + 3 H_2 O_{(g)} \xrightarrow[catalyst]{\Delta }$
$(iv) \, Zn_{(s)} + NaOH_{(aq)} \xrightarrow{heat}$

Which of the following metals absorbs hydrogen?