Chemistry - Metals and Their Compounds

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Question - 1

Which one of the following metals occurs in nature in free state?

  • A Gold
  • B Sodium
  • C Aluminium
  • D Copper

Question - 2

Which is the purest form of iron?

  • A Pig iron
  • B Cast iron
  • C Wrought iron
  • D Steel

Question - 3

Statement I Chlorine radicals CL initiate the chain reaction for ozone depletion.

Statement II Gaseous hypochlorous acid and chlorine photolysed by sunlight.

  • A Both the Statements are true and Statement II is the correct explanation of Statement I
  • B Both the Statements are true and Statement II is not the correct explanation of Statement I
  • C  Statement I is true, but Statement  II is false
  • D  Statement I is false, but Statement  II is true

Question - 4

When an alkali-metal reacts with water, which one of the following gases is producted?

  • A Hydrogen
  • B Oxygen
  • C Hydrogen peroxide
  • D Ozone

Question - 5

Solder is an alloy of

  • A tin and lead
  • B tin and copper
  • C tin, copper and Zinc
  • D tin, lead and zinc

Question - 6

Which one of the following consists only the ores of magnesium?

  • A Magnesite,carnallite,cassiterite,dolomite,epsom salt
  • B Magnesite,carnallite,dolomite,kieserite, epsom salt.
  • C Magnesite,carnallite,dolomite,galena,malachite
  • D Magnesite,cassiterite,kieserite,galena,malachite

Question - 7

Consider the following statements Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to 

1. act as a reducing agent.

2.remove silica associated with the iron ore.

3.function as fuel, to supply heat.

4.act as on oxidizing agent.

of these statements

  • A 1 and 2 are correct
  • B 2 and 4 are correct
  • C 1 and 3 are correct
  • D 3 and 4 are correct

Question - 8

Neutral refractory material used in furnance is

  • A graphite
  • B SiO2
  • C CaO
  • D MgO

Question - 9

Statement I All compounds contain more than one element.

Statement II All compounds are heterogeneous mixtures

  • A Both the statements are true and Statement II is the correct explanation of Statement I
  • B Both the statements are true and Statement II is not the correct explanation of Statement I
  • C Statement I is true,but statement II is false
  • D Statement I is false,but statement II is true

Question - 10

Consider the following statements

1.Bronze is an alloy of copper and tin.

2.White gold is an alloy of gold containing platinum and lead.

Which of the statements given above is/are correct?

  • A Only 1
  • B Only 2
  • C Both 1 and 2
  • D Neither 1 nor 2