Chemistry MCQs for NEET — Practice Questions with Answers

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Shape of $ O_2F_2 $ is similar to that of

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Explanation

The shape of $O_2F_2$ (dioxygen difluoride) is similar to that of $H_2O_2$ (hydrogen peroxide). Both molecules have a non-linear (bent) structure due to the presence of lone pairs of electrons on the oxygen atoms, leading to a skewed or twisted shape.

Mark element that shows oxidation state only one

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Explanation

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

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Explanation

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.

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Explanation

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

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Mark smallest atom

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Explanation

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

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Explanation

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

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Which statement is correct about halogens?

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Explanation

Halogens can mutually displace each other from the solution of their compounds with metals. This property is based on their relative reactivity: a more reactive halogen can displace a less reactive halogen from its compounds. For example, chlorine can displace bromine and iodine from their salts.

Inisolation of F., a number of difficulties were encounted. Which statement is correct?

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