Chemistry/Chemistry MCQ Question - BLOCK ELEMENTS Sample Test,Sample questions

Question:
Addition of 2% gypsum in cement

1.Triggers hydration

2.Triggers hydrolysis

3.Prevents rapid hardening

4.all of the above


Question:
Alkali and alkaline earth metals impart colours when heated over burner. It is due to

1.Smaller electronegativity of alkali metals

2.Smaller ionic radius of these metals

3.Excitation of Excitation of electrons from low energy levels to higher energy levels

4.Excitation of electrons from low energy levels to higher energy levels


Question:
Ammonia may be prepared by heating ammonium chloride with

1.Water

2.NaCl

3.Aqueous sodium hydroxide

4.H2SO4


Question:
Among the halogens the rare element is

1.Fluorine

2.Chlorine

3.Astatine

4.Iodine


Question:
Bleaching powder is an example of

1.Normal salt

2.Double salt

3.Mixed salt

4.Complex


Question:
Bromine can be liberated from KBr solution by the action of

1.Iodine solution

2.Chlorine

3.NaCl

4.Ki


Question:
Calcium carbide is prepared by heating lime with coke at

1.2500?C

2.2600?C

3.2700?C

4.2800?C


Question:
Carnalite has chemical formula

1.KCI

2.KCI.MgCl2.6H2O

3.Na2B4O7.10H2O

4.CaCO3.MgCO3


Question:
Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction?

1.Cl2O

2.ClO2

3.Cl2O6

4.Cl2O7


Question:
Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is

1.Displacement reaction

2.Double displacement reaction

3.Disproportionation reaction

4.Reduction reaction


Question:
Crystals of Na2CO3. 10H2O when exposed to air

1.Lose water and remain solid

2.Gain water and remain solid

3.Gain water and become liquid

4.Remains unchanged


Question:
Downs cell is used to prepare

1.Sodium carbonate

2.Sodium bicarbonate

3.Sodium metal

4.Sodium hydroxide


Question:
Electrolysis of dilute solution of NaCl results at the anode

1.sodium

2.hydrogen

3.chlorine

4.oxygen


Question:
First ionization potential of alkaline earth metal is greater than alkali metals because

1.They are more reactive

2.They have greater atomic radii

3.They have smaller atomic sizes

4.All


Question:
Fluorine can react with

1.Xe

2.Kr

3.Rn

4.All of the above


Question:
Gypsum is applied to the soil as a source of

1.Ca and P

2.S and P

3.Ca and S

4.we could not apply


Question:
In diaphragm cell hydrogen is discharged by the reduction of

1.Water

2.HCI

3.Na+

4.NaCl


Question:
In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents

1.Hydroxide ions to reach anode

2.Chlorine gas to mix

3.Cathode to decay

4.All of the above


Question:
Magnesium metal does not burn in the vessel containing

1.N2

2.O2

3.N2 and O2

4.Ne


Question:
NaOH is named as caustic soda because

1.It corrodes the organic tissues

2.It is used in soda water

3.It reacts with chlorine gas

4.It reacts with fats to form soap


Question:
Second ionization potential of alkali metals are very high due to

1.being s-block elements

2.inert gas configurations

3.ns1 electronic configuration

4.being metals


Question:
Sodium is not observed in +2 oxidation state because of its

1.high first ionization potential

2.high second ioniation potential

3.high ionic radius

4.high electronegativity


Question:
The chemical formula of sodium hypochlorite is

1.NaCLO

2.NaClO2

3.NaClO3

4.NaClO4


Question:
The colour of chlorine gas is

1.pale yellow

2.freenish yellow

3.reddish brown

4.grayish black


Question:
The deliquescence is a property in which a solid

1.Absorbs moisture and remains solid

2.Absorbs moisture and turns to liquid form

3.Loses water of crystallization

4.Increases the number of water of crystallization


Question:
The element cesium bears resemblance with

1.Ca

2.Cr

3.Both of the above

4.None of the above


Question:
The halogen having highest electron affinity is

1.Fluorine

2.Chlorine

3.Bromine

4.Iodine


Question:
The halogen which reacts spontaneously with gold (Au) to form Au+3 is

1.F2

2.Cl2

3.Br2

4.I2


Question:
The halogen which reacts very slowly with halogen is

1.Fluorine

2.Chlorine

3.Bromine

4.Iodine


Question:
The most powerful oxidizing agent among the halogens is

1.F2

2.Cl2

3.Br2

4.I2


Question:
The ore CaSO4.H2O has the general name

1.Gypsum

2.Dolomite

3.Calcite

4.Plaster of Paris


Question:
Vander Waals forces are stronger in

1.F2

2.Cl2

3.Br2

4.I2


Question:
Which element is produced at the cathode during the electrolysis of brine in Nelsons cell?

1.H2

2.Na

3.C?2

4.O2


Question:
Which ion will have maximum value of heat of hydration?

1.A1+3

2.Cs+

3.Ba+

4.Mg+2


Question:
Which is the strongest acid?

1.HCIO

2.HCIO2

3.HCIO3

4.HCIO4


Question:
Which of the following oxides of iodine is used for quantitative analysis of CO?

1.I2O4

2.I4O2

3.I2O5

4.All are equally useful


Question:
Which of the following represents the correct electronic configuration of VII A group elements in the ground state?

1.ns2p2

2.ns2p4

3.ns2p5

4.ns2p6


Question:
Which of the following statements is incorrect about fluorine

1.fluorine is restricted to -1 oxidation state

2.fluorine follows octet rule and as well as extended octet rule

3.fluorine has lowest dissociation energy among the halogens

4.both b and c


Question:
Which of the following statements is incorrect about halogens?

1.All are non-metals

2.All the halogens have electronic conviguration ns2p5

3.They have high electron attinity and ionization energy

4.All the halogens react with noble gases to form their halides


Question:
Which of the halogen can displace other three elements?

1.Flourine

2.Chlorine

3.Iodine

4.Bromine


Question:
Which of the halogen has highest electronegativity?

1.Fluorine

2.Chlorine

3.Bromine

4.Iodine


Question:
Which one can form complex?

1.Na

2.Cr

3.Li

4.K


Question:
Which one is least ionic in nature and decompose on heating.

1.LiOH

2.NaOH

3.KOH

4.CsOH


Question:
Which one is natron?

1.Na2CO3

2.Na2CO3.10H2O

3.Na2CO3.H2O

4.NaHCO3


Question:
Which one of the following alkali metals forms only normal oxide when it reacts with O2?

1.Lithium

2.Sodium

3.Potassium

4.Rubidium


Question:
Which one of the following carbonate is water insoluble?

1.Na2CO3

2.K2CO3

3.(NH4)2CO3

4.CaCO3


Question:
Which one of the following gives white precipitate with aqueous solution of BaC?2?

1.NaHCO3

2.NaNO3

3.Na2CO3

4.Na2CrO4


Question:
Which one of the following is the weakest acid in water

1.HF

2.HCI

3.HBr

4.HI


Question:
Which one of the following pairs shown diagonal relationship in the periodic table?

1.Sodium and Lithium

2.Lithium and magnesium

3.Lithium and beryllium

4.Boron and Beryllium


Question:
Which one of the following substances conducts electricity by the movement of ions?

1.Graphite

2.Copper

3.Molten sodium chloride

4.Mercury


More MCQS

  1. Nobel Prizes in Chemistry
  2. G.K Question and Answer - Chemistry MCQs Set I
  3. G.K Question and Answer - Chemistry MCQs Set II
  4. G.K Question and Answer - Chemistry MCQs Set III
  5. G.K Question and Answer - Chemistry MCQs Set IV
  6. G.K Question and Answer - Chemistry MCQs Set V
  7. G.K Question and Answer - Chemistry MCQs Set VI
  8. Chemistry MCQ Questions Set-1
  9. Chemistry MCQ Questions Set-2
  10. Chemistry MCQ Questions Set-3
  11. Chemistry MCQ Questions Set-4
  12. Chemistry MCQ Questions Se-9
  13. Chemistry MCQ Questions Set-10
  14. Chemistry MCQ Questions Set-11
  15. Chemistry MCQ Questions Set-12
  16. Chemistry MCQ Questions Set-13
  17. Chemistry MCQ Questions set-8
  18. Chemistry MCQ Question -Periodic Classification
  19. Chemistry MCQ Question - Basic Concept
  20. Chemistry MCQ Question - Electrochemistry
  21. Chemistry MCQ Question - Environmental Chemistry
  22. Chemistry MCQ Question - BLOCK ELEMENTS
  23. Chemistry MCQ Question - ThermoChemistry
  24. Chemistry MCQ Question - Aliphatic Hydrocarbons
  25. Chemistry MCQ Question - Experimental Techniques
  26. Chemistry MCQ Question - Macromolecules
  27. Chemistry MCQ Question - MCAT ECAT Chemistry Paper
  28. Chemistry MCQ Question - Aromatic Hydrocarbons
  29. Chemistry MCQ Question - Atomic Structure
  30. Chemistry MCQ Question - Chemical Equilibrium
  31. Chemistry MCQ Question - Reaction Kinetics
  32. Chemistry MCQ Question - Transition Elements
  33. Chemistry MCQ Question - Aldehydes and Ketones
  34. Chemistry MCQ Question - Common Chemical Industries
  35. Chemistry MCQ Question - Atomic
  36. Chemistry MCQs Set 1
  37. Chemistry MCQs
Search
R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!