Chapter 14

Consider the following substances: 1\. OF, 2\. \(\mathrm{Cl}_{2} \mathrm{O}\) 3\. \(\mathrm{Br}_{2} \mathrm{O}\) The correct sequence of \(\mathrm{X}-\mathrm{O}-\mathrm{X}\) bond angle is (a) \(3>2>1\) (b) \(1>2>3\) (c) \(2>1>3\) (d) \(1>3>2\)

Consider the following properties of the noble gases: 1\. They readily form compounds which are colourless 2\. They generally do not form ionic compounds. 3\. They have variable oxidation states in their compounds 4\. Generally do not form covalent compounds Select the correct properties. (a) 1 (b) 1,3 (c) 2,3 (d) \(1,2,3\)

Regarding \(\mathrm{F}^{-}\)and \(\mathrm{Cl}^{-}\)which of the following statements is correct? 1\. Cl can give up an electron more easily than \(\mathrm{F}^{-}\) 2\. \(\mathrm{Cl}^{-}\)is a better reducing agent than \(\mathrm{F}^{-}\) 3\. \(\mathrm{Cl}^{-}\)is smaller in size than \(\mathrm{F}^{-}\) 4\. \(\mathrm{F}^{-}\)can be oxidized more readily than \(\mathrm{Cl}^{-}\) (a) 1,2 and 4 (b) 1 only (c) 1 and 2 (d) 3 and 4

Alkali metals are characterized by 1\. good conductor of heat and electricity 2\. high oxidation potentials 3\. high melting point 4\. solubility in liquid ammonia (a) 1,2 (b) \(2,3,4\) (c) \(1,2,4\) (d) all of these

Match the following: List I 1\. thermal stability 2\. acidic nature 3\. boiling points 4\. \(\angle \mathrm{MMH}\) bond angle List II (i) \(\mathrm{H}_{2} \mathrm{~S}<\mathrm{H}_{2} \mathrm{Se}<\mathrm{H}_{2} \mathrm{Te}<\mathrm{H}_{2} \mathrm{PO}\) (ii) \(\mathrm{H}_{2} \mathrm{O}>\mathrm{H}_{2} \mathrm{~S}>\mathrm{H}_{2} \mathrm{Se}>\mathrm{H}_{2} \mathrm{Te}\) (iii) \(\mathrm{H}_{2} \mathrm{~S}<\mathrm{H}_{2} \mathrm{Se}<\mathrm{H}_{2} \mathrm{Te}<\mathrm{H}_{2} \mathrm{O}\) (iv) \(\mathrm{H}_{2} \mathrm{~S}>\mathrm{H}_{2} \mathrm{Se}>\mathrm{H}_{2} \mathrm{Te}=\mathrm{H}_{2} \mathrm{PO}\) The correct matching is 1 \(\begin{array}{lll}2 & 3 & 4\end{array}\) (a) (iii) (ii) (i) (iv) (b) (iv) (i) (ii) (iii) (c) (ii) (i) (iii) (iv) (d) (i) (ii) (iii) (iv)

Which of the following order is incorrect? (1) \(\mathrm{PH}_{3}<\mathrm{AsH}_{3}<\mathrm{SbH}_{3}<\mathrm{NH}_{3}\) (Melting point) (2) \(\mathrm{PH}_{3}<\mathrm{AsH}_{3}<\mathrm{NH}_{3}<\mathrm{SbH}_{3}\) (Boiling point) (3) \(\mathrm{NH}_{3}>\mathrm{PH}_{3}>\mathrm{AsH}_{3}>\mathrm{SbH}_{3}>\mathrm{BiH}_{3}\) (Dipole moment) (a) only 1 (b) only 2 (c) both (1) and (2) (d) none is incorrect here

Match the following: List I List II 1\. most electronegative (i) \(\mathrm{I}_{2}\) 2\. most electron affinity (ii) At 3\. liquid halogen (iii) \(\mathrm{F}_{2}\) 4\. radio active halogen (iv) \(\mathrm{Cl}_{2}\) (v) \(\mathrm{Br}_{2}\) The correct matching is: \(\begin{array}{llll}1 & 2 & 3 & 4\end{array}\) (a) (iii) (iv) (v) (ii) (b) \(\begin{array}{ll}\text { (iii) (iv) } & \text { (v) }\end{array}\) (i) (c) (ii) (i) (iii) (iv) (d) \(\begin{array}{llll}\text { (iii) (i) } & \text { (ii) } & \text { (iv) }\end{array}\)

The incorrect statement/s among the following is /are (a) \(\mathrm{NCl}_{5}\) does not exist while \(\mathrm{PCl}_{5}\) does (b) Lead prefers to form tetravalent compounds (c) The three \(\mathrm{C}-\mathrm{O}\) bonds are not equal in the carbonate ion (d) Both \(\mathrm{O}_{2}^{+}\)and \(\mathrm{NO}\) are paramagnetic

Which of the following halogens does not turn starch iodine paper blue? (a) \(\mathrm{I}_{2}\) (b) \(\mathrm{F}_{2}\) (c) \(\mathrm{Cl}_{2}\) (d) \(\mathrm{Br}_{2}\)

Which among the following statements is/are correct here: (a) He and Ne do not form clathrate (b) \(\mathrm{XeF}_{4}\) and \(\mathrm{SbF}_{4}\) combine to form salt (c) He has highest boiling point in its group (d) He diffuses through rubber and polyvinyl chloride

Which of these is/are not true about the oxoacids of halogens? (a) All of them are good reducing agents (b) All of them are monobasic (c) They may be monobasic as well as polybasic (d) They have general formula HXOn.

Select the incorrect statement about Buckyball or Buckminister fullerene? (a) It is an allotrope of carbon. (b) It is referred as C-60 and C-70. (c) In it carbon atoms are sp \(^{3}\) hybridised. (d) It is inert like diamond.

Which one of the following arrangements do not truely represent the property indicated against it? (a) \(\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}-\) Electronegativity (b) \(\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}-\) Bond energy (c) \(\mathrm{Br}_{2}<\mathrm{Cl}_{2}^{2}<\mathrm{F}_{2}-\) Electron affinity (d) \(\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}^{2}-\) oxidizing power

Which of the following noble gases do not form any compound? (a) \(\mathrm{Kr}\) (b) \(\mathrm{He}\) (c) Xe (d) Ne

Which of the following names can be used for group VIII A elements? (a) Rare-earths (b) Inert gases (c) Rare gases of atmosphere (d) Noble gases

Which of the following compounds contain boron? (a) Colemanite (b) Kernite (c) Borax (d) Cristoballite

Which of the following will displace the halogen from the solution of the halide? (a) \(\mathrm{Cl}_{2}\) added to a KBr solution (b) \(\mathrm{Br}_{2}\) added to an \(\mathrm{NaCl}\) solution (c) \(\mathrm{Br}_{2}\) added to a KI solution (d) \(\mathrm{Cl}_{2}\) added to an \(\mathrm{NaF}\) solution

Nitrogen is prepared by heating (a) Microcosmic salt, \(\mathrm{NaNH}_{4} \mathrm{HPO}_{4} \cdot 4 \mathrm{H}_{2} \mathrm{O}\) (b) A mixture of \(\mathrm{CuO}\) and \(\mathrm{NH}_{3}\) (c) A mixture of \(\mathrm{NH}_{4} \mathrm{Cl}\) and \(\mathrm{NaNO}_{3}\) (d) Barium azide

Graphite is a (a) Good conductor of electricity (b) Good insulator (c) Bad conductor of heat (d) Good conductor of heat

Chlorine behaves as an oxidizing agent upon reaction with (a) \(\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}\) (b) \(\mathrm{NaNO}_{2}\) (c) \(\mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}\) (d) \(\mathrm{O}_{3}\)

Which of the following statements are correct for the nitrogen molecule? (a) It is a good ligand (b) The bond order is \(2.2\) (c) It easily reacts with magnesium even at room temperature (d) It is used in the Serpeck's process

Select the incorrect statement: (a) Fluorine cannot show oxidation number greater than zero (b) Halogens do not directly combine with oxygen (c) Iodine can not displace chlorine from \(\mathrm{KClO}_{3}\) (d) Euchlorine is a mixture of \(\mathrm{Cl}_{2}\) and \(\mathrm{Cl}_{2} \mathrm{O}_{7}\)

Which of the following are bent? (a) \(\mathrm{Br}_{3}^{+}\) (b) \(\mathrm{I}_{3}^{-}\) (c) \(\mathrm{I}_{3}+\) (d) \(\mathrm{F}_{3}^{-}\)

Which of the following pairs is/are correctly matched here: (a) The strongest oxidizing agent - Iodine (b) The most reactive halogen - Fluorine (c) A halogen which is liquid at room temperature-Bromine (d) The most electronegative element-Fluorine

Which of the following statements are correct for the \(\mathrm{P}_{4}\) molecule? (a) Its reacts with nitrogen to form a phosphorous nitrogen polymer (b) The electron affinity of phosphorous is negative (c) The P-P bond distance are equal (d) The P-P-P bond angles are \(60^{\circ}\).

Among the following, the correct statement is (a) Phosphates have no biological significance in humans (b) Between nitrates and phosphates, phosphates are less abundant in earth's crust (c) Between nitrates and phosphates, nitrates are less abundant in earth's crust (d) Oxidation of nitrates is possible in soil.

Among the following, the correct statement is (a) Between \(\mathrm{NH}_{3}\) and \(\mathrm{PH}_{3}, \mathrm{NH}_{3}\) is a better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional (b) Between \(\mathrm{NH}_{3}\) and \(\mathrm{PH}_{3}, \mathrm{PH}_{3}\) is a better electron donor because the lone pair of electrons occupies \(s p^{3}\) orbital and is more directional (c) Between \(\mathrm{NH}_{3}\) and \(\mathrm{PH}_{3}, \mathrm{NH}_{3}\) is a better electron donor because the lone pair of electrons occupies \(s p^{3}\) orbital and is less directional

White phosphorus on reaction with \(\mathrm{NaOH}\) gives \(\mathrm{PH}_{3}\) as one of the products. This is a (a) Dimerization reaction (b) Disproportional reaction (c) Condensation reaction (d) Precipitation reaction

The increasing order of the oxidizing capacity of the oxyacids of chlorine is (a) \(\mathrm{HClO}_{4}<\mathrm{HClO}_{3}<\mathrm{HClO}_{2}<\mathrm{HClO}\) (b) \(\mathrm{HClO}_{3}<\mathrm{HClO}_{4}<\mathrm{HClO}_{2}<\mathrm{HClO}\) (c) \(\mathrm{HClO}_{4}<\mathrm{HClO}_{3}^{*}<\mathrm{HClO}^{2}<\mathrm{HClO}_{2}\) (d) \(\mathrm{HClO}<\mathrm{HClO}_{2}<\mathrm{HClO}_{3}<\mathrm{HClO}_{4}^{2}\)

Among the oxyacids of the type \(\mathrm{HXO}_{3}\), the weakest acid would be (a) \(\mathrm{HBrO}_{3}\) (b) \(\mathrm{HIO}_{3}\) (c) \(\mathrm{HClO}_{3}^{3}\) (d) al the three will be of same strength

The oxidizing power of \(\mathrm{HXO}_{4}\) type compounds of halogens is in the order (a) \(\mathrm{HIO}_{4}>\mathrm{HBrO}_{4}>\mathrm{HClO}_{4}\) (b) \(\mathrm{HIO}_{4}>\mathrm{HClO}_{4}>\mathrm{HBrO}_{4}\) (c) \(\mathrm{HBrO}_{4}>\mathrm{HIO}_{4}>\mathrm{HClO}_{4}\) (d) \(\mathrm{HClO}_{4}>\mathrm{HBrO}_{4}>\mathrm{HIO}_{4}\)

Match the following (a) Engel's sulphur (p) Crystalline formyellow crystals (b) \(\chi-\) sulphur (q) Fibrous or rubber like (c) Rhombic sulphur (r) Puckered \(\mathrm{S}_{\mathrm{g}}\) rings (crown configuration) (d) \(\gamma\)-monoclinic (s) \(\mathrm{S}_{4}\) rings, chair conformation, unstable

Match the following (a) Boron (p) Amphoteric oxide (b) Carbon (q) Acidic oxide (c) Silicon (r) Catenation (d) Phosphorous (s) Allotropy

Match the following (a) \(\mathrm{F}_{2}\) (p) Metallic lusture (b) \(\mathrm{Cl}_{2}\) (q) Most electronegative (c) \(\mathrm{Br}_{2}\) (r) Highest bond energy (d) \(\mathrm{I}_{3}\) (s) Reddish liquid

Match the following (a) Diamond (p) sp^{2} - h y b r i d i s a t i o n (b) Graphite (q) \(\mathrm{sp}^{3}\)-hybridisation (c) Fullerene (r) Tetrahedral (d) Norbide (s) Carbide

Match the following (a) \(\mathrm{F}_{2}\) (p) pale yellow coloured gas (b) \(\mathrm{Cl}_{2}\) (q) violet colour solid (c) \(\mathrm{Br}_{2}\) (r) orange red liquid (d) \(\mathrm{I}_{2}\) (s) greenish coloured gas

Match the following (a) Oxygen (p) Octa atomic (b) Sulphur (q) Diatomic (c) Nitrogen (r) Paramagnetic (d) Chlorine (s) Diamagnetic

\(\mathrm{PCl}_{3}\) and \(\mathrm{PCl}_{5}\) both exists; \(\mathrm{NCl}_{3}\) exists but \(\mathrm{NCl}_{5}\) does not exist. It is due to (a) lower electronegativity of P than \(\mathrm{N}\) (b) lower tendency of \(\mathrm{N}\) to form covalent bond (c) availability of vacant d orbital in P but not in \(\mathrm{N}\) (d) statement is itself incorrect

Number of P-O bonds in \(\mathrm{P}_{4} \mathrm{O}_{10}\) is (a) 17 (b) 16 (c) 15 (d) 6

What may be expected to happen when phosphine gas is mixed with chlorine gas? [2002] (a) the mixture only cools down (b) \(\mathrm{PCl}_{3}\) and \(\mathrm{HCl}\) are formed and the mixture warms up (c) \(\mathrm{PCl}_{5}\) and \(\mathrm{HCl}\) are formed and the mixture cools down (d) \(\mathrm{PH}_{3}-\mathrm{Cl}_{2}\) is formed with warming up

Which one of the following substances has the highest proton affinity? [2003] (a) \(\mathrm{NH}_{3}\) (b) \(\mathrm{H}_{2} \mathrm{O}\) (c) \(\mathrm{PH}_{3}\) (d) \(\mathrm{H}_{2} \mathrm{~S}\)

The solubilities of carbonates decrease down the magnesium group due to thedecrease in [2003] (a) inter ionic interaction (b) lattice energies of solids (c) entropy of solution formation (d) hydration energies of cations

The solubilities of carbonates decrease down the magnesium group due to a decrease in [2003] (a) lattice energies of solids (b) hydration energies of cations (c) entropy of solution formation (d) inter ionic attraction

Which one of the following ion has the highest value of ionic radius? (a) \(\mathrm{F}^{-}\) (b) \(\mathrm{O}^{2-}\) (c) \(\mathrm{B}^{3+}\) (d) \(\mathrm{Li}^{+}\)

Which one of the following ion has the highest value of ionic radius? (a) \(\mathrm{F}^{-}\) (b) \(\mathrm{O}^{2-}\) (c) \(\mathrm{B}^{3+}\) (d) \(\mathrm{Li}^{+}\)

Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point? [2005] (a) \(\mathrm{LiCl}\) (b) \(\mathrm{NaCl}\) (c) \(\mathrm{KCl}\) (d) \(\mathrm{RbCl}\)

The correct order of the thermal stability of hydrogen halides \((\mathrm{H}-\mathrm{X})\) is \(\quad[2005]\) (a) \(\mathrm{HCl}>\mathrm{HF}>\mathrm{HBr}>\mathrm{HI}\) (b) \(\mathrm{HI}>\mathrm{HCl}>\mathrm{HF}>\mathrm{HBr}\) (c) \(\mathrm{HI}>\mathrm{HBr}>\mathrm{HCl}>\mathrm{HF}\) (d) \(\mathrm{HF}>\mathrm{HCl}>\mathrm{HBr}>\mathrm{HI}\)

Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which one of these statements gives the correct picture? [2006] (a) the reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group (b) in both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group (c) chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens (d) in alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group

The ionic mobility of alkali metal ions in aqueous solution is maximum for (a) \(\mathrm{K}^{+}\) (b) \(\mathrm{Rb}^{+}\) (c) \(\mathrm{Li}^{+}\) (d) \(\mathrm{Na}^{+}\)

The decreasing values of bond angles from \(\mathrm{NH}_{3}\) \(\left(106^{\circ}\right)\) to \(\mathrm{SbH}_{3}\left(101^{\circ}\right)\) down group 15 of the periodic table is due to (a) increasing bp-bp repulsion (b) increasing p orbital character in sp \(^{3}\) (c) decreasing lp-bp repulsion (d) decreasing electronegativity