NEET Practice Questions - Chemistry - General Principles and Processes of Isolation of Elements

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  • Subject:

    Chemistry

  • Chapter:

    General Principles and Processes of Isolation of Elements


High purity copper metal is obtained by:

(a) carbon reduction

(b) hydrogen reduction

(c) electrolytic reduction

(d) thermite process


Aluminothermic process is used for the extraction of metals, whose oxides are:

(a) fusible

(b) not easily reduced  by carbon

(c) not easily reduced by hydrogen

(d) strongly basic


Purest form of iron is:

(a) cast iron

(b) hard steel

(c) stainless steel

(d) wrought iron


Thomas slag is:

(a) calcium silicate

(b) calcium  phosphate

(c) tricalcium phosphate and calcium silicate

(d) calcium ammonium phosphate


Corundum is:

(a) SrO2

(b) Al2O3

(c) CaCl2

(d) Cu2Cl2

 


Heating of carbonate ores to remove carbon is called as:

(a) roasting

(b) calcination

(c) smelting

(d) fluxing


Sulphide ores are common for the metals:

(a) Ag, Cu and Pb

(b) Ag, Cu and Sn

(c) Ag, Mg and Pb

(d) Al, Cu and Pb


Which element occurs freely in nature?

(a) Iodine

(b) Sulphur

(c) Phosphorus

(d) Magnesium


The metal used in storage batteries is:

(a) Cu

(b) Sn

(c) Pb

(d) Ni


Silver obtained by argentiferrous lead is purified by:

(a) distillation

(b) froth floatation

(c) cupellation

(d) reacting with KCN