Answer: Option i) & ii) Lithium exhibits a high ionization enthalpy in addition to a high degree of hydration. This is owing to the fact that it is so little.
Answer: Option i) & ii) Be mimics Al (diagonal relationship), and together they create a protective film of oxide that is resistant to acid assault. Because of the high hydration enthalpy of...
Answer: option i) & iii) The tendency to generate halide hydrates decreases gradually as one moves down the chemical group. The hydrates are MgCl2.6H2O, CaCl2.6H2O, SrCl2.6H2O, and BaCl2.2H2O.
Answer: Option ii) & iii) Because of this, when zeolite, which is sodium aluminium silicate, reacts with hard water, the sodium ion of zeolite is swapped for calcium and magnesium ions.
Answer: Option i) & ii) Because their hydration enthalpies are higher than their lattice enthalpies, BeSO4 and MgSO4 are extremely soluble in water. CaSO4, SrSO4, and BaSO4 have low hydration...
Answer: Option i) & iii) Both the chemicals are widely used in industries for preparation of other compounds in large scale.
Answer: Option ii) & iv) Periods begin with alkali metals. For their period, alkali metals have the biggest atomic radius. They have low density due to their huge size and low bulk. Alkali...
Answer: Option iv) Because they are hygroscopic in nature, the calcium, barium, and strontium halides operate as a dehydrating agent in the body. They are capable of absorbing moisture....
Answer: option iii) Ca(OH)2 is the chemical A that is used in the manufacturing of washing soda Na2CO3 in order to recover ammonia. It is a reaction that occurs during the Solvay process, which is...
Answer: Option i) Slaked lime is formed by combining quicklime and water to form a paste. Because quicklime can be used in the manufacture of cement, slaked lime can be used in the manufacture of...
Answer: Option ii) The alkali metal compounds and alkaline earth metal compounds give the flame its colour. In a flame, calcium turns brick red, strontium turns crimson red, barium turns apple...
Answer: Option iv) The formula for soda ash is $Na_2CO_3$ that is sodium carbonate.
Answer: Option i) When heated, all of the elements, with the exception of beryllium, mix with hydrogen to create their hydrides.
Answer: Option iii) Calcium hydroxide dissociates in an aqueous solution, releasing calcium cations and hydroxide anions. Calcium oxide is the chemical compound known as quicklime. Milk of lime is a...
solution: As indicated by the inquiry, Subsequently, the ideal condition is the one that addresses the development of CH4 (g) i.e., Enthalpy of arrangement of\[~CH4\left( g \right)\text{...
Answer: Option i) When plaster of Paris is heated to 200°C, it transforms into anhydrous calcium sulphate, often known as dead plaster, which lacks setting properties since it absorbs water at a...
Answer: Option ii) The addition of gypsum serves only to slow down the setting process of the cement, allowing it to solidify to a sufficiently hard state before use.
Answer: option i) The concentration of these solvated ions in the sodium in liquid ammonia solution changes the color to copper. So the ammoniated electron is responsible for the solution's color.
Answer: Option i) Sodium carbonate is synthesised by Solvary ammonia soda process.
Solution: Since \[\begin{array}{*{35}{l}} H\theta \text{ }=\text{ }U\theta \text{ }+\text{ }ngRT\text{ }and\text{ }U\theta \text{ }=\text{ }\text{ }X\text{ }kJ\text{ }mol1\text{ }, \\ ~ \\ H\theta...
Answer: option i) The solubility of hydroxides of alkaline earth metals in water increases as the alkaline earth metals move from Be to Ba. Both Be(OH)2 and Mg(OH)2 are nearly insoluble in water....
Answer: Option ii) Lattice and hydration enthalpies encourage the dissolving of alkali metal halides in water. Fluorides are soluble in this order: LiF, NaF, KF, RbF, CsF. The high lattice energy of...
Answer: option iii) Increasing the size of the atoms in a group results in a decrease in ionization enthalpy. As a result, the following is the ranking: Li > Na > K > Rb.
Solution: (I) Sodium responds to shape NaOH and H2 gas when it is dropped in water. The response happens as displayed beneath: \[2Na\left( s \right)\text{ }+\text{ }2H2O\left( l \right)\text{...
Answer: Option i) Beryllium haldies are essentially covalent compounds that are soluble in organic solvents such as ethanol and acetic acid.
Answer: Option i) As the ionisation enthalpy increases from Mg to Ba, the M – O bond weakens and weakens down the group, and as a result, basicity increases down the group as a function of time. As...
Answer: Option i) Because of the smaller cation and larger anion sizes (smaller cation stabilises smaller anion through crystal lattice energy), Beryllium Carbonate can only be preserved in CO2...
Answer: Option iv) The thermal stability of metal carbonates rises as the metal's electropositive character or basicity increases from Be(OH)2 to Ba(OH)2. The most stable is BaCO3.
Solution: \[\begin{array}{*{35}{l}} ~ \\ \left( a \right)\text{ }2Na2O2\left( s \right)\text{ }+\text{ }2H2O\left( l \right)\text{ }\to \text{ }4NaOH\left( aq \right)\text{ }+\text{ }O2\left( aq...
Answer: option iii) Li's hydration enthalpy is likewise high (highly exothermic). Li atom has the highest hydration enthalpy, making it the strongest reducing agent in aqueous media. - Li atom's...
Answer: Option i) The answer is Li has a high hydrogen enthalpy. So its water reaction produces a lot of energy, which is used up infusion, vaporization, and ionization. So its water interaction is...
Solution: (iii) When chloride is added to slaked lime, it gives blanching powder. \[Ca\left( OH \right)2\text{ }+\text{ }Cl2\text{ }CaOCl2\text{ }+\text{ }H2O\] Blanching powder (iv)...
Solution: The correct answer is option (iv). The melting point of alkali metals drops as the strength of metallic bonding diminishes with increasing the size of the atom, as shown in the graph. As a...
Solution: (a) Sodium can be extricated from sodium chloride by Downs measure. This interaction includes the electrolysis of intertwined NaCl (40%) and CaCl2 (60 %) at a temperature of 1123 K in...
Answer: Option (i) is correct. Beryllium carbonate is stable and decomposes to give beryllium oxide and carbon dioxide. The concentration of carbon dioxide grows in the right side, causing the...
Answer: Option i) is correct Lithium carbonate readily decomposes into lithium oxide and carbon dioxide. Others do not decompose. $Li _{2} CO _{3} \stackrel{\Delta}{\longrightarrow} Li _{2} O + CO...
Column I(i) Cs (ii) Na (iii) K (iv) Ca (v) Sr (vi) Ba Column II(a) Apple green ((b) Violet (c) Brick red (d) Yellow (e) Crimson red (f) Blue Answer: (i) is f (ii) is d (iii) is b (iv) is c...
Column I(i) CaCO3 (ii) Ca(OH)2 (iii) Cao (iv) CaSO4 Column II(a) Dentistry, ornamental work (b) Manufacture of sodium carbonate from caustic soda (c) Manufacture of high-quality paper (d) Used in...
Solution: (I) Solubility: Soluble base metal nitrates, carbonates and sulfates have water solvency. At the point when you drop down the gathering of soluble base metals, you will see that the...
Answer: (i) is c (ii) is b (iii) is d (iv) is a,e Explanation: Li: E is the most negative because of the extremely high hydration enthalpy. Na: NaOH is produced from the letter Na (strong base). One...
Answer: The gaseous/vapour state differs from the solid state in several ways. In the solid state, BeCl2 has a polymeric chain structure, which is similar to that of water. In the presence of...
Answer: Because of the small atomic and ionic sizes of Be and Mg, their electrons are closely attached to the atom. Flames occur as a result of an electron being excited from one of its energy...
Solution: We realize that the Solvay interaction is utilized in the readiness of sodium carbonate. This interaction is financially savvy contrasted with different cycles of arrangement of Sodium...
Answer: Because an oxygen atom with zero charges contains six electrons, the oxidation state of the atom is zero. An atom of oxygen with a negative charge contains seven electrons, while when it has...
Answer: The Solvay method passes $CO_2$ through a concentrated sodium chloride solution containing ammonia, forming ammonium carbonate and ammonium hydrogen carbonate. Crystals of ammonium hydrogen...
Answer: As a result of their large ionic size and low activation enthalpy, alkali metal compounds create ionic compounds, whereas lithium produces covalent compounds as a result of its small ionic...
Answer: CaSO4, SrSO4, and BaSO4 are insoluble in water, whereas BeSO4 and MgSO4 are readily soluble in water. This is because to the higher hydration enthalpies of the Be2+ and Mg2+ ions, which...
Answer: i) Carbonate thermal stability rises with cationic size. The more stable an alkaline earth metal's oxide, the less stable its carbonate. As BeO is stable, BeCO3 is not. (ii) Alkali metals...
Solution: Likenesses among lithium and magnesium: (I) lithium and magnesium respond delayed with cold water. (ii) oxides of lithium and magnesium are less dissolvable in H2O. additionally the...
Answer: Beryllium is from Group 2. Unlike the other chemicals, beryllium oxide is amphoteric. Group 2 sulfates are water-soluble, as is $BeSO_4$.
Answer: i) In terms of weight and hardness, lithium and magnesium are both significantly lighter and tougher than the other metals in their respective families. (ii) Both LiCl and MgCl2 halides are...
Answer: (i) Peroxide ions react with water and form $H _{2} O _{2}$. $O _{2}^{2-}+2 H _{2} O \longrightarrow 2 OH ^{-}+ H _{2} O _{2}$ (ii) Superoxides react with water and form $H _{2} O _{2}$...
Answer: The reactivity of alkali metals towards oxygen rises with atomic size. So Li only produces LiO2 (Li2O). Sodium forms mostly sodium peroxide and a little sodium oxide, while potassium forms...
Answer: Lithium has the largest negative E value of any element, measuring –3.04V. Lithium has tiny atomic size and the highest ionization enthalpy of all the elements, although this is offset by...
Solution: (d) BaCO3 Warm dependability is straightforwardly corresponding to the size of the cation i.e., bigger the size of the iota, more prominent is its warm security. The greatest cation among...
Solution: (a) Li Li is fit for shaping hydrated salts in light of its size. Since it is more modest in size, it has a higher charge thickness and can undoubtedly draw in water atoms around it and...
Solution: (d) Cs Cs has the most un-liquefying point of the given salt metals since it has the biggest size. Because of a bigger size, the limiting capacity of Cs is restricted and the grid energy...
Solution: (I) The measures of Be2+ and O2-are little and are profoundly viable with one another. Because of this, a high measure of cross section energy is delivered during its arrangement. The...
Solution: (a) Sodium bicarbonate and sodium hydroxide are the finished results when Na2CO3 is hydrolyzed. Since, the item are basic in nature, an answer of Na2CO3 is viewed as basic in nature. (b)...
Solution: (a) The ionic and nuclear sizes of the metals will in general increment while going down the antacid gathering. The expanding request of the ionic sizes of the salt metal particles is as...
Solution: Sodium (Na): They are found in our blood plasma and the interstitial liquids around the cells. They help in (a) Transmission of nerve signals. (b) They direct the progression of water...
Solution: LiF has a more noteworthy ionic person than LiCl which upsets the harmony between hydration energy and cross section energy. This equilibrium is critical for the reasonability of particles...
Solution: Since Lithium has the littlest size among all the soluble base metals, it can without much of a stretch enraptured water atoms. Subsequently, more modest the size of the particle, more...
Solution: Employments of concrete: Extension development Putting Most significant fixing in concrete Employments of Plaster of Paris: Used to make projects and shape Used to make careful wraps...
solution: Since the nuclear sizes of magnesium and calcium are more modest than that of sodium and potassium, calcium and magnesium structure carbonates and hydroxides with higher cross section...
solution: BeCl2 has a straight construction and exists as a monomer in the fume state. 2. In the strong stage, BeCl2 is a polymer.
solution: (I) Caustic pop (a) Heavily utilized in cleanser ventures. (b) Common reagent in research centers. (ii) Sodium carbonate (a) Finds utilizes in both cleanser and glass ventures. (b) Also...
Solution: The electropositive person increments while dropping down in the gathering of soluble base metal which brings about an increment in solidness of antacid carbonates. For the most part,...
Solution: Solvay measure isn't pertinent for the arrangement of potassium carbonate since potassium carbonate is dissolvable in water and it doesn't hasten out like sodium bicarbonate.
solution: The valence electrons get eager to a higher energy level when a basic earth metal is warmed. It transmits energy which has a place with the apparent locale when this invigorated electron...
solution: At the point when the soluble base metal is broken up in fluid alkali, a dark blue shaded arrangement is framed. \[M+\left( x+y \right)NH3\to M\left( NH3 \right)x+e-{}^\text{1}\text{...
Solution: Lithium, potassium, and cesium, are all antacid metals. Yet at the same time, potassium and cesium are utilized in photoelectric cell and not Lithium since Li is more modest in size when...
Solution: By utilizing a more grounded lessening specialist, the oxides of metals get diminished by the cycle called synthetic decrease. Basic earth metals and soluble base metals are solid among...
Solution: Alkaline earth metals Solubility of hydroxide: They are less soluble compared to alkali metals as it has high lattice energy and is having higher charge densities...
solution: On dropping down the gathering in the antacid metals, the size of the molecule increments and the impact of the atomic charge gets diminished. Because of these elements, the electron of...
Solution: Leave the oxidation territory of Na alone y. In the event of peroxides, the oxidation condition of oxygen is - 1. Subsequently, \[\begin{array}{*{35}{l}} ~ \\ 2\left( y...
Solution: Sodium, cesium, lithium, francium, potassium, rubidium all together include the salt metals. They comprise of just a single electron on its valence shell, which gets free effectively...
Solution: General attributes: (I) (Noble gas) ns2 is the electronic design of basic earth metal. (ii) To possess the closest inactive gas setup, these metals lose two of their...
Solution: Actual properties: (1) The soluble base metal is delicate thus we can cut them without any problem. We can ready to cut the sodium metal even by utilizing the blade. (2)...
solution: Choice (iii) is the appropriate response. This is because Thermodynamics informs us concerning the practicality, energy changes and degree of compound response. It doesn't informs us...