R4RIN – MCQs, Mock Tests | IIT JEE IIT Chemistry Of Lighter Metals

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.

✅ Correct Answer: 1

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.

✅ Correct Answer: 3

Which element amongst the following has the highest boiling point?

1. Na
2. Mg
3. Ca
4. K.

✅ Correct Answer: 2

The principal ore of aluminium is.

1. bauxite
2. corrundum
3. cryolite
4. Feldspar

✅ Correct Answer: 1

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

1. Gold
2. Copper
3. Silver
4. Sodium

✅ Correct Answer: 4

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

1. Levigation
2. Froth floatation
3. Magnetic separation
4. Leaching

✅ Correct Answer: 4

Froth floatation process is used for the concentration of.

1. Oxide ores
2. Sulphide ores
3. Chloride ores
4. Amalgams

✅ Correct Answer: 2

The most abundant element in earths crust is.

1. nitrogen
2. oxygen
3. iron
4. magnesium

✅ Correct Answer: 2

Beryllium shows diagonal relationship with.

1. Mg
2. Na
3. Al
4. B

✅ Correct Answer: 3

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

1. sulphide
2. chloride
3. nitrate
4. None of these

✅ Correct Answer: 3

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

1. Mg
2. Na
3. Ca
4. K

✅ Correct Answer: 3

Which of the following is not an alkali metal?

1. Rb
2. Cs
3. Sb
4. Fr.

✅ Correct Answer: 3

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

1. Aluminium
2. Magnesium
3. Iron
4. Gold

✅ Correct Answer: 3

Which of the following barium salts is soluble in water.

1. Barium sulphate
2. Barium carbonate
3. Barium nitrate
4. Barium phosphate

✅ Correct Answer: 3

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

1. Calcium
2. Magnesium
3. Sodium
4. Potassium

✅ Correct Answer: 2

Solvays process is used for the manufacture of.

1. sodium metal
2. washing soda
3. potassium chlorate
4. ammonia

✅ Correct Answer: 2

The wire of flash bulb is made up of

1. Cu
2. Ag
3. Mg
4. Ba.

✅ Correct Answer: 3

When NaCl is dissolved in water the sodium ion is.

1. oxidised
2. reduced
3. hydrolysed
4. hydrated

✅ Correct Answer: 4

Slag is formed by reaction between

1. impurities and coke
2. impurities and ore
3. impurities and flux
4. None of these

✅ Correct Answer: 3

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

1. flux
2. slag
3. minerals
4. gangue

✅ Correct Answer: 4

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.

✅ Correct Answer: 2

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.

✅ Correct Answer: 1

In which of the following minerals aluminium is not present?

1. Cryolite
2. Mica
3. Feldspar
4. Fluorspar.

✅ Correct Answer: 4

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.

✅ Correct Answer: 2

At high temperature nitrogen combines with calcium carbide to give

1. Calcium cyanide
2. Calcium cynamide
3. Calcium nitride
4. Calcium carbonate.

✅ Correct Answer: 2

Which of the following is an ore of potassium?

1. Carnallite
2. Cryolite
3. Bauxite
4. Dolomite.

✅ Correct Answer: 1

Potassium is stored under.

1. Water
2. Alcohol
3. Ammonia
4. Kerosene

✅ Correct Answer: 4

The approximate percentage of gypsum in Portland cement is

1. 10-15%
2. 20-30%
3. 30-40%
4. 2-3%.

✅ Correct Answer: 4

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

✅ Correct Answer: 1

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

1. slag
2. gangue
3. flux
4. matrix.

✅ Correct Answer: 3

Smelting is generally carried out in

1. Reverberatory furnace
2. Muffle furnace
3. Bessemer converter
4. Blast furnace.

✅ Correct Answer: 1

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.

✅ Correct Answer: 3

Heating pyrites in air to remove sulphur is known as

1. Calcination
2. Roasting
3. Smelting
4. Bessemerisation.

✅ Correct Answer: 2

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

1. Copper
2. Mercury
3. Silver
4. Gold.

✅ Correct Answer: 4

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

✅ Correct Answer: 2

Caustic soda is

1. Efflorescent
2. Deliquescent
3. Water repelling
4. Reducing agent.

✅ Correct Answer: 2

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.

✅ Correct Answer: 4

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.

✅ Correct Answer: 2