IIT JEE/IIT Chemistry Of Lighter Metals Sample Test,Sample questions

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Question: 
Alkali metals can be extracted from their salts by

1.reduction with carbon

2.solution of their halides

3.electrolysis of fused halides

4.reduction with aluminium.

Posted Date:-2021-09-27 12:40:04

Question: 
Alkali metals do not exist in free state in mature because these aremetallic in naturehighly electronegative elements.

1.very reactive

2.very volatile

3.metallic in naturehighly electronegative

4.None of these

Posted Date:-2021-09-27 12:40:04

Question: 
At high temperature nitrogen combines with calcium carbide to give

1.Calcium cyanide

2.Calcium cynamide

3.Calcium nitride

4.Calcium carbonate.

Posted Date:-2021-09-27 12:40:04

Question: 
Beryllium shows diagonal relationship with.

1.Mg

2.Na

3.Al

4.B

Posted Date:-2021-09-27 12:40:04

Question: 
Caustic soda is

1.Efflorescent

2.Deliquescent

3.Water repelling

4.Reducing agent.

Posted Date:-2021-09-27 12:40:04

Question: 
Chlorophyll the main pigment responsible for absorption of light in plants contains.

1.Calcium

2.Magnesium

3.Sodium

4.Potassium

Posted Date:-2021-09-27 12:40:04

Question: 
Froth floatation process is used for the concentration of.

1.Oxide ores

2.Sulphide ores

3.Chloride ores

4.Amalgams

Posted Date:-2021-09-27 12:40:04

Question: 
Heating pyrites in air to remove sulphur is known as

1.Calcination

2.Roasting

3.Smelting

4.Bessemerisation.

Posted Date:-2021-09-27 12:40:04

Question: 
In which of the following minerals aluminium is not present?

1.Cryolite

2.Mica

3.Feldspar

4.Fluorspar.

Posted Date:-2021-09-27 12:40:04

Question: 
Molten sodium chloride conducts electricity due to the presence of

1.Free electrons

2.Free ions

3.Free molecules

4.Atoms of sodium and chlorine.

Posted Date:-2021-09-27 12:40:04

Question: 
Potassium is stored under.

1.Water

2.Alcohol

3.Ammonia

4.Kerosene

Posted Date:-2021-09-27 12:40:04

Question: 
Slag is formed by reaction between

1.impurities and coke

2.impurities and ore

3.impurities and flux

4.None of these

Posted Date:-2021-09-27 12:40:04

Question: 
Smelting is generally carried out in

1.Reverberatory furnace

2.Muffle furnace

3.Bessemer converter

4.Blast furnace.

Posted Date:-2021-09-27 12:40:04

Question: 
Sodium hydroxide solution reacts with phosphorus to give phosphine. To bring about this reaction we need

1.White phosphorus and dil. NaOH

2.White phosphorus and conc. NaOH

3.Red phosphorus and dil. NaOH

4.Red phosphorus and conc. NaOH.

Posted Date:-2021-09-27 12:40:04

Question: 
Solvays process is used for the manufacture of.

1.sodium metal

2.washing soda

3.potassium chlorate

4.ammonia

Posted Date:-2021-09-27 12:40:04

Question: 
The approximate percentage of gypsum in Portland cement is

1.10-15%

2.20-30%

3.30-40%

4.2-3%.

Posted Date:-2021-09-27 12:40:04

Question: 
The ignition mixture in Alumino-thermite process contains a mixture of

1.Magnesium powder and barium peroxide

2.Magnesium powder aluminium and barium peroxide

3.Magnesium and aluminium powders

4.Magnesium and aluminium oxide.

Posted Date:-2021-09-27 12:40:04

Question: 
The impurities associated with the ore after mining are collectively called.

1.flux

2.slag

3.minerals

4.gangue

Posted Date:-2021-09-27 12:40:04

Question: 
The metallic luster exhibited by sodium is explained by

1.Diffusion of sodium ions

2.Oscillation of loose electrons

3.Excitation of free electrons

4.Excitation of free electrons

Posted Date:-2021-09-27 12:40:04

Question: 
The most abundant element in earths crust is.

1.nitrogen

2.oxygen

3.iron

4.magnesium

Posted Date:-2021-09-27 12:40:04

Question: 
The principal ore of aluminium is.

1.bauxite

2.corrundum

3.cryolite

4.Feldspar

Posted Date:-2021-09-27 12:40:04

Question: 
The reason for floating of ore particles in concentration by froth floatation process is that

1.they are light

2.they are insoluble

3.they are charged

4.they are hydrophobic.

Posted Date:-2021-09-27 12:40:04

Question: 
The salt which is least likely to be found in minerals is

1.sulphide

2.chloride

3.nitrate

4.None of these

Posted Date:-2021-09-27 12:40:04

Question: 
The substance which is added to ore in order to remove impurities during smelting is called

1.slag

2.gangue

3.flux

4.matrix.

Posted Date:-2021-09-27 12:40:04

Question: 
The wire of flash bulb is made up of

1.Cu

2.Ag

3.Mg

4.Ba.

Posted Date:-2021-09-27 12:40:04

Question: 
When NaCl is dissolved in water the sodium ion is.

1.oxidised

2.reduced

3.hydrolysed

4.hydrated

Posted Date:-2021-09-27 12:40:04

Question: 
Which element amongst the following has the highest boiling point?

1.Na

2.Mg

3.Ca

4.K.

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following barium salts is soluble in water.

1.Barium sulphate

2.Barium carbonate

3.Barium nitrate

4.Barium phosphate

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following is an ore of potassium?

1.Carnallite

2.Cryolite

3.Bauxite

4.Dolomite.

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following is not an alkali metal?

1.Rb

2.Cs

3.Sb

4.Fr.

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following metals can be extracted by smelting?.

1.Aluminium

2.Magnesium

3.Iron

4.Gold

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following metals is always found in free state?

1.Copper

2.Mercury

3.Silver

4.Gold.

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following metals is the most abundant in the earths crust?.

1.Mg

2.Na

3.Ca

4.K

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following metals never occurs in free state in nature?.

1.Gold

2.Copper

3.Silver

4.Sodium

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following methods is used for concentration of bauxite ore?

1.Levigation

2.Froth floatation

3.Magnetic separation

4.Leaching

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following statements is correct regarding the slag obtained during the extraction of a metal like copper or iron?The slag is lighter and has lower melting point than the metalThe slag is heavier and has lower melting point than the metalThe slag is lighter and has higher melting point than the metalThe slag is heavier and has higher melting point than the metal.Which of the following statements is correct regarding the slag obtained during the extraction of a metal like copper or iron?

1.The slag is lighter and has lower melting point than the metal

2.The slag is heavier and has lower melting point than the metal

3.The slag is lighter and has higher melting point than the metal

4.The slag is heavier and has higher melting point than the metal.

Posted Date:-2021-09-27 12:40:04

Question: 
Which of the following statements is correct?

1.All ores are minerals

2.All minerals are ores

3.Calcination is generally carried out in blast furnace

4.Oxide ores are concentrated by froth floatation process.

Posted Date:-2021-09-27 12:40:04

Question: 
Zone refining process is used for the

1.Concentration of an ore

2.Reduction of a metal oxide

3.Purification of metals

4.Purification of an ore.

Posted Date:-2021-09-27 12:40:04

Posted on by R4R Team

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