S and P block Test 11

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Correct order of increasing activity is

Answers Choices:

\(Cu,\) \(Mg,\) \(Na\)

\(Na,\) \(Mg,\) \(Cu\)

\(Mg,\) \(Na,\) \(Cu\)

\(Cu,\) \(Na,\) \(Mg\)

Questions 2 of 50

Question:Potash alum is a

Answers Choices:

Complex salt

Acid salt

Double salt

Normal salt

Questions 3 of 50

Question:The valence shell electronic configuration of alkali metals is

Answers Choices:

\(n{s^2}n{p^1}\)

\(n{s^1}\)

\((n - 1){p^6}n{s^2}\)

\((n - 1){d^2}n{s^2}\)

Questions 4 of 50

Question:When sodium dicarbonate is heated strongly for calcined in a kiln, it forms

Answers Choices:

\(Na\)

\(N{a_2}C{O_3}\)

\(NaC{O_3}\)

\(NaHC{O_3}\)

Questions 5 of 50

Question:The strongest reducing agent of the alkali metal is

Answers Choices:

Li

Na

K

Cs

Questions 6 of 50

Question:Alkaline earth metals are denser than alkali metals, because metallic bonding in alkaline earth's metal, is

Answers Choices:

Stronger

Weaker

Volatile

Not present

Questions 7 of 50

Question:The metal which reacts with water at room temperature is

Answers Choices:

Copper

Iron

Magnesium

Sodium

Questions 8 of 50

Question:Sodium thiosulphate \((N{a_2}{S_2}{O_3}.5{H_2}O)\) is used in photography to

Answers Choices:

Reduce silver bromide to metallic silver

Convert metallic silver to silver salt

Remove undecomposed \(AgBr\)as a soluble silver thiosulphate complex

Remove unreduced silver

Questions 9 of 50

Question:Which one of the following metalic hydroxides does not dissolve in sodium hydroxide solution

Answers Choices:

\(Zn{(OH)_2}\)

\(Al\,{(OH)_3}\)

\(Fe{(OH)_3}\)

\(Pb{(OH)_2}\)

Questions 10 of 50

Question:To prevent magnesium from oxidation in electrolytic extraction process

Answers Choices:

Some calcium fluoride is added

Some chlorides are added

Metal is taken out by spoons

The whole process is done in an atmosphere of coal gas

Questions 11 of 50

Question:Deep pink colour is given to flame by the salts of

Answers Choices:

Strontium

Potassium

Zinc

Barium

Questions 12 of 50

Question:Electronegativity of beryllium is approximately equal to that of

Answers Choices:

Aluminium

Boron

Magnesium

Sodium

Questions 13 of 50

Question:A major constituent of portland cement except lime is

Answers Choices:

Silica

Alumina

Iron oxide

Magnesia

Questions 14 of 50

Question:Alkaline earth metals are denser than alkali metals because metallic bonding is

Answers Choices:

Stronger

Weaker

Not present

Volatile

Questions 15 of 50

Question:The ionic compound \(BaS{O_4}\) is insoluble in water due to

Answers Choices:

High lattice energy

Low lattice energy

Low hydration energy

Both (1) and (3)

Questions 16 of 50

Question:Iron pipes lying under acidic soil are often attached to blocks of magnesium for protection from rusting. Magnesium offers protection to iron against corrosion because it

Answers Choices:

Prevents air from reaching the surface of iron

is more readily converted into positive ions

Is higher than iron

Forms a corrosion-resistance alloy with iron

Questions 17 of 50

Question:Which metal burn in air at high temperature with the evolution of much heat

Answers Choices:

\(Cu\)

\(Hg\)

\(Pb\)

\(Al\)

Questions 18 of 50

Question:Crystalline metal can be transformed into metallic glass by

Answers Choices:

Alloying

Pressing into thin plates

Slow cooling of molten metal

Very rapid cooling of a spray of the molten metal

Questions 19 of 50

Question:\(AlC{l_3}\) is

Answers Choices:

Anhydrous and covalent

Anhydrous and ionic

Covalent and basic

Coordinate and acidic

Questions 20 of 50

Question:Aluminium is obtained by

Answers Choices:

Reducing \(A{l_2}{O_3}\) with coke

Electrolysing \(A{l_2}{O_3}\) dissolved in \(N{a_3}Al{F_6}\)

Reducing \(A{l_2}{O_3}\) with chromium

Heating alumina and cryolite

Questions 21 of 50

Question:Which of the following is the electron deficient molecule

Answers Choices:

\({B_2}{H_6}\)

\({C_2}{H_6}\)

\(P{H_3}\)

\(Si{H_4}\)

Questions 22 of 50

Question:Lead pencil’ contains

Answers Choices:

\(PbS\)

Graphite

\(({H_3}B{O_3})\)

\(Pb\)

Questions 23 of 50

Question:The compound which does not possess a peroxide linkage is

Answers Choices:

\(N{a_2}{O_2}\)

\(Cr{O_5}\)

\({H_2}S{O_5}\)

\(Pb{O_2}\)

Questions 24 of 50

Question:When tin is treated with concentrated nitric acid

Answers Choices:

It is converted into stannous nitrate

It is converted into stannic nitrate

It is converted into metastannic acid

It becomes passive

Questions 25 of 50

Question:Percentage of lead in lead pencil is

Answers Choices:

Zero

20

80

70

Questions 26 of 50

Question:Which of the following is not known

Answers Choices:

\(NC{l_5}\)

\(N{I_3}\)

\(SbC{l_3}\)

\(NC{l_3}\)

Questions 27 of 50

Question:Phosphorus is manufactured by heating in a electric furnace a mixture of

Answers Choices:

Bone ash and coke

Bone ash and silica

Bone ash, silica and coke

None of these

Questions 28 of 50

Question:Which of the following metal produces nitrous oxide with dil. \(Zn\)

Answers Choices:

\(Sn\)

\(Zn\)

\(Cu\)

\(Ag\)

Questions 29 of 50

Question:In which compound, the oxidation state of phosphorus is+4

Answers Choices:

\({P_4}{O_{11}}\)

\({P_4}{O_8}\)

\(PC{l_5}\)

\(NC{l_5}\)

Questions 30 of 50

Question:The most stable hydride is

Answers Choices:

\(N{H_3}\)

\(P{H_3}\)

\(As{H_3}\)

\(Sb{H_3}\)

Questions 31 of 50

Question:Which of the following is a true acidic anhydride

Answers Choices:

\(CO\)

\(NO\)

\(Cl{O_2}\)

\({N_2}{O_5}\)

Questions 32 of 50

Question:Ammonia gas can be collected by the displacement of

Answers Choices:

Conc. \({H_2}S{O_4}\)

Brine

Water

Mercury

Questions 33 of 50

Question:When aluminium phosphide is treated with dil. sulphuric acid

Answers Choices:

\(S{O_2}\) is liberated

\(P{H_3}\) is evolved

\({H_2}S\) is evolved

\({H_2}\) is evolved

Questions 34 of 50

Question:Which one has the highest percentage of nitrogen

Answers Choices:

Urea

Ammonium sulphate

Ammonium nitrate

Calcium nitrate

Questions 35 of 50

Question:The most common minerals of phosphorus are

Answers Choices:

Hydroxy apatite and kernite

Colemanite and fluoraptite

Borax and fluoraptite

Hydroxy apatite and colemanite

Hydroxy apatite and fluorapatile

Questions 36 of 50

Question:Which of the following is solid in nature

Answers Choices:

\(NO\)

\({N_2}O\)

\({N_2}{O_3}\)

\({N_2}{O_5}\)

Questions 37 of 50

Question:Which of the following is nitrogenous fertilizers

Answers Choices:

Bone meal

Thomas meal

Nitro phosphate

Ammonium sulphate

Questions 38 of 50

Question:Which one of the following hydrides is least stable

Answers Choices:

\(As{H_3}\)

\(Sb{H_3}\)

\(N{H_3}\)

\(P{H_3}\)

Questions 39 of 50

Question:In the nitrogen family the \(H - M - H\) bond angle in the hydrides \(M{H_3}\) gradually becomes closer to \({90^o}\) on going from N to Sb. This shows that gradually

Answers Choices:

The basic strength of hydrides increases

Almost pure p-orbitals are used for \(M - H\) bonding

The bond energies of \(M - H\) bond increase

The bond pairs of electrons become nearer to the central atom

Questions 40 of 50

Question:In the electrothermal process, the compound displaced by silica from calcium phosphate is

Answers Choices:

Calcium

Phosphine

Phosphorus

Phosphorus pentoxide

Questions 41 of 50

Question:Most abundant element on earth is

Answers Choices:

\(O\)

\(S\)

\(Se\)

\(Te\)

Questions 42 of 50

Question:The correct order of acidic strength

Answers Choices:

\(C{l_2}{O_7} > S{O_2} > {P_4}{O_{10}}\)

\({K_2} > CaO > MgO\)

\(C{O_2} > {N_2}{O_5} > S{O_3}\)

\(N{a_2}O > MgO > A{l_2}{O_3}\)

Questions 43 of 50

Question:Iodine and hypo react to produce

Answers Choices:

\(N{a_2}S\)

\(HCl\)

\(N{a_2}{S_4}{O_6}\)

\(N{a_2}S{O_3}\)

Questions 44 of 50

Question:Which statement is not true

Answers Choices:

\(Ni\,{(CO)_4}\) is diamagnetic

\(C{O_2}\) is a stronger Lewis acid than \(Sn{(OH)_2}\)

Graphite conducts electricity whereas diamond does not

\(CC{l_4}\) is hydrolysed whereas \(BC{l_3}\) is inert

Questions 45 of 50

Question:Which is formed when fluorine react with hot and concentrated sodium hydroxide

Answers Choices:

\({O_2}\)

\({O_3}\)

NaO

HF

Questions 46 of 50

Question:Among \(C{l^ - },\) \(B{r^ - },\) \({I^ - },\) the correct order for being oxidise to dihalogen is

Answers Choices:

\({I^ - } > C{l^ - } > B{r^ - }\)

\(C{l^ - } > B{r^ - } > {I^ - }\)

\({I^ - } > B{r^ - } > C{l^ - }\)

\(B{r^ - } > {I^ - } > C{l^ - }\)

Questions 47 of 50

Question:Which is the lightest gas

Answers Choices:

Hydrogen

Oxygen

Helium

Nitrogen

Questions 48 of 50

Question:Least chemical activity is shown by

Answers Choices:

Nitrogen

Argon

Methane

Ammonia

Questions 49 of 50

Question:The correct order of solubility in water for \(He,\,Ne,\,Ar,\,Kr,\,Xe,\,\)is

Answers Choices:

\(He > Ne > Ar > Kr > Xe\)

\(Ne > Ar > Kr > He > Xe\)

\(Xe > Kr > Ar > Ne > He\)

\(Ar > Ne > He > Kr > Xe\)

Questions 50 of 50

Question:The last member of inert gas elements is

Answers Choices:

Helium

Neon

Argon

Radon