Practice free Classification of elements and Periodicity in properties (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
$ HNO_3 + P_2O_5 \rightarrow A + B $ , A is an Oxyacid of phosphorous and B is an oxide of N. A and B respectively are
The reaction between $HNO_3$ and $P_2O_5$ yields metaphosphoric acid ($HPO_3$) and dinitrogen pentoxide ($N_2O_5$). The balanced equation is: $HNO_3 + P_2O_5 ightarrow HPO_3 + N_2O_5$.
When heated $ NH_3$ is passed over CuO gas evolved is
When ammonia ($NH_3$) is passed over copper(II) oxide (CuO) and heated, nitrogen gas ($N_2$) is evolved. The reaction is: $2NH_3 + 3CuO ightarrow N_2 + 3Cu + 3H_2O$.
Which of the following is the most basic oxide
Mark element that shows oxidation state only one
Fluorine (F) shows only one oxidation state, which is -1. This is because fluorine is the most electronegative element and cannot exhibit any positive oxidation states. It always gains one electron to complete its octet.
Which of following has lowest boiling point
Among the given hydrogen halides, HCl has the lowest boiling point. This is because the boiling point increases with the increase in molecular weight and strength of van der Waals forces. HF has strong hydrogen bonding, so it has a higher boiling point, while HCl, being the lightest after HF, has the lowest boiling point among HCl, HBr, and HI.
Fluorine is stronger oxidizing agent than chlorine in aqueous solution. This is attributed to many factors except.
The stronger oxidizing nature of fluorine compared to chlorine in aqueous solution is attributed to factors such as heat of dissociation, heat of hydration, and ionization potential. Electron affinity, however, does not play a significant role in this context as it pertains to the energy change when an electron is added to an isolated atom in the gaseous state.
Mark the element that displaces 3 halogens from their compound
Mark smallest atom
Atomic size increases as you move down the group in the periodic table due to the addition of extra electron shells. Therefore, fluorine (F) is the smallest atom among the given options as it is at the top of the halogen group.
Which of following arrangement for 3 halogens Cl, Br, I when placed in order of increasing e-affinity
Electron affinity generally decreases as you move down the group in the periodic table. Therefore, iodine (I) has the lowest electron affinity, followed by bromine (Br), and chlorine (Cl) has the highest electron affinity among the three. Thus, the arrangement in order of increasing electron affinity is I, Br, Cl.
Fluorine is better oxidizing agent than $ Br_2 $ , It is due to
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Classification of elements and Periodicity in properties question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.