S and Some P Block Elements

Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in

Which of the following is not hygroscopic

The formula for calcium chlorite is

Identify the correct statement:

A solid compound X on heating gives CO₂ and a residue . The residue mixed with water forms Y. On passing an excess of CO₂ through Y in water, a clear solution Z is obtained . On boiling Z, compound X is reformed . The compound X is

In the case of alkali metals, the covalent character decreases in the order

Which of the following oxides is not expected to react with sodium hydroxide

Property of the alkaline earth metals that increases with their atomic number

Which of the following compounds is a peroxide

Which one of the following is present as an active ingredient in bleaching powder for bleaching action

Which one of the alkali metals, forms only, the normal oxide, M₂O on heating in air

The case of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order:

Which of the following does not decompose on heating

Identify the feasible reaction among the following

CrO₃ dissolves in aqueous NaOH to gives

Calcium is obtained by the

Which of the following compound react with NaHCO3 solution to give sodium salt and carbon dioxide

Due to reference in biological role, Ca²⁺ ions are important in

What is the formula of bleaching powder

Na₂CO₃ is manufactured by solvay process, the products that are recycled are

Washing soda has the formula

Which is insoluble in water

Why do calcium ions make water hard but sodium ions do not

Among the following the compound that is readily soluble in water is

Which of the following does not participate in Solvey’s process for the formation of Na₂CO₃

Salt cake is

The cell used for the electrolysis of fused NaCl is

During the electrolysis of fused sodium chloride the anodic reaction is

When carbon monoxide is passed over solid caustic soda heated to 200⁰ C it forms

When sodium bicarbonate is heated strongly for calcined in a Kiln, it forms

Solution of sodium metals in liquid ammonia strongly reduces due to the presence in which of the following solution

Excess of Na⁺ ions in air system causes

In a lime kiln, to get higher yield of CO₂, the measure that can be taken is

The characteristic not related to alkali metals is

For alkali metals, which one of the following trends is incorrect

The s-block element used as a catalyst in the manufacture of Buna-S rubber is

Limestone is not used in which of the following manufacturing processes

The increasing order of atomic radius for the elements Na, Rb, K and Mg is

The substance that causes temporary hardness in water is

The process used for the extraction of sodium is called

As the alkaline earth metals (except Be) tend to lose their valence electrons readily they act as

Which of the following materials is used in high temperature thermometers

Carnallite on electrolysis gives

When a standard solution of NaOH is left in air for a few hours

Dead burnt plaster is

The following composition is known as “Bordeaux mixture”.

Among the metals Cr, Fe, Mn, Ti, Ba and Mg, the one that cannot be obtained by reduction of its metal oxide by aluminium is

For which one of the following minerals, the composition given is incorrect

Which of the following metal is not manufactured by electrolysis

Which one of the following does not react with water even under red hot condition

Which one of the following metals is required as cofactor by all enzymes utilizing ATP in phosphate transfer

Choose the paramagnetic oxide in the following

The increasing order of the density of alkali metals

The alkali halide that is soluble in pyridine is

Choose the incorrect statement in the following

Correct order of the stability of group IIA metal carbonates is

Formula of gypsum is

Bleaching powder is prepared from the reaction of

In which process,fused sodium hydroxide is eletrolysed at a 330⁰C temperature for extraction of sodium

Grignard reagent is prepared by the reaction between

Bleaching powder is obtained by treating chloride with

K₂Cr₂O₇ on heating with aqueous NaOH gives

Magnesium does not decompose in

Plaster of paris is used

Which of the following is not soluble in NaOH

The number of hydroxide ions produced by one molecule of sodium carbonate (Na₂CO₃) on hydrolysis is

Gas A is bubbled through slacked lime, a white precipitate is formed. On prolonged bubbling the precipitate is dissolved. On heating the resultant solution, the white precipitate reappeares with evolution of gas B. The gases A and B respectively are

Bleaching powder is obtained by treating Cl₂ with

Which of the following corresponds to the electronic configuration 1s², 2s²,2p⁶,3s²

NaOCl is used as a bleaching agent and sterilising agent. It can be synthesized by the action of

The hydration energy of Mg²⁺ is greater than that of

Aluminium reacts with caustic soda to form

In the manufacture of cement which of the following is used

First ionization potential of Mg is

The constituents of porland cement are

Alum in dyeing of clothes is used as

Li occupies higher position in the electrochemical series of metals as compared to Cu since

Melting point is the higher for

Living in the atmosphere of CO is dangerous , because it

CO₂ is obtained by heating

Glass is soluble in

Diamond is used I glass cutting due to its

Which of the following is true for diamond

The lusture of a metal is due to

Which of the following does not contain aluminium

Pb + Conc.HNO₃ gives

Aluminium oxide is not reduced by chemical reaction since

Aluminium deposited vapours on glass forms a good mirror essentially because

Which of the following shows bond in silicone?

Which of the following glasses is the most heat resistant?

Which of the following is the least stable and its existence is doubtful

Which of the following does not show electrical conduction?

Hardest compound of boron is

In diborane the two H-B-H angles are nearly

Incorrect statement about Ge is

The wrong statement about fullerene is

Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6.This is due to

Which of the following statements about H₃BO₃ is not correct

Aluminium (III) chloride forms a dimer because aluminium

Boron compounds behave as Lewis acid, because of their

In graphide electrons are

Which compound is electron deficient?

Which one of the following compounds is not a protonic acid?

The correct order regarding the electronegetivity of hybrid orbitals of carbon is

Which of the following oxidation states are the most characteristic for lead and tin respectiviely?

Which of the following anions is present in the chain structure of silicates

Boron is unable to form BF₆³⁻ because of

The element that does not form a monoxide is

Inorganic graphite is

The hardest substance amongst the following is

The main reason that SiCl₄ is easily hydrolysed as compared to CCl₄ is that

The number of carbon atoms in Buckminsterfullerene is

The anion, (Si₆O₁₈)¹²⁻ is present in

Reaction of diborane with ammonia gives initially

The element that does not show catenation among the following p-block elements is

Germanium of very high purity is obtained by

The products formed when diborane is hydrolysed are

The diagonal partner of element B is

The products of the following reaction are

Which of the following is not hydrolysed easily

In the aluminothermite process , aluminium acts as

Which does not exist

Which of the following glass is used in making wind screen of automobiles

Mg burns in CO₂ to produce

The hybridisation of B in BF₃ molecules is

Which of the following shows electrical conduction?

Higher percentage of carbon is found in

The banana bond in diborane is constituted by

At room temperature the solid compound is

By passing air over red hot coke the gas obtained is

Which statement is correct

Carbogen is

In laboratory burners , we use

The two adjacent sheets are bonded together in graphite with

White lead is

In graphite C atom is in …state

Which of the following is a metalloid

Which of the following statements is not correct