Recent questions tagged isolation-of-elements

(a) How is granular zinc & zinc dust obtained ? (b) Explain why thermit process is quite useful for repairing the broken parts of a machine ?

asked Dec 29, 2016 by sharmaaparna1

1 answer

(a) Why refractory metals are used in the construction of furnaces ? (b) What is pyrometallurgy ?

asked Nov 25, 2016 by meena.p

1 answer

Describe how the following changes are brought about : (i) Pig irons into steel (ii) Zinc oxide into metallic zinc

asked Nov 22, 2016 by meena.p

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a) What is the role of depressent in froth flotation process ? b) Out of C and CO, which is a better reducing agent for FeO? (i) In the lower part of blast furnace (Higher temperature ) (ii) In the upper part of blast furnace (lower temperature )

asked Nov 15, 2016 by meena.p

1 answer

Why is it advantageous to roast a sulphide ore to the oxide before reduction ?

asked Nov 7, 2016 by meena.p

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Differenciate between rate of reaction and reaction rate constant

asked Nov 4, 2016 by meena.p

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With the help of an example how one can separate two sulphide ores by froth flotation method .

asked Nov 3, 2016 by meena.p

1 answer

Account for the following : (a) Chloro methane reacts with KCN to form ethanenitrile as main product and with $AgCN$ to form methyl isocyanide as chief product . (b) Chloroform should be stored in dark coloured bottles and these bottle should be completely filled .

asked Oct 19, 2016 by meena.p

1 answer

Give Reason The monoamino monocarboxylic acids have two PH values

asked Oct 17, 2016 by meena.p

1 answer

Gold and silver are extracted from their respective ares by

asked Dec 22, 2015 by meena.p

1 answer

Heating of carbonates to remove carbon dioxide is called

asked Dec 22, 2015 by meena.p

1 answer

Which oil is used as frother in the frith floatation process ?

asked Dec 22, 2015 by meena.p

1 answer

Cinnabar is the are containing

asked Dec 22, 2015 by meena.p

1 answer

Which metal is obtained by self reduction process ? or Where the proportionally constant k is called rate constant

asked Dec 22, 2015 by meena.p

1 answer

Specific gravity of slag is

asked Dec 22, 2015 by meena.p

1 answer

Van Arkel method of purification of metals involves converting the metal to a

asked Dec 22, 2015 by meena.p

1 answer

Which of the following substance contains both ca and Mg ?

asked Dec 22, 2015 by meena.p

1 answer

Which of the following fluxes is used to removed acidic impurites in metallurgical process ?

asked Dec 22, 2015 by meena.p

1 answer

Malachite is a mineral of

asked Dec 22, 2015 by meena.p

1 answer

Mercury is transported in metal containers made up of

asked Dec 22, 2015 by meena.p

0 answers

Mercury is transported in metal containers made up of

asked Dec 22, 2015 by meena.p

1 answer

Zinc blende is

asked Dec 22, 2015 by meena.p

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In the extraction of iron slag produced is

asked Dec 22, 2015 by meena.p

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Chromium is obtained by reducing purified chromite ore with

asked Dec 22, 2015 by meena.p

1 answer

Refractory material are used in furnaces because they

asked Dec 22, 2015 by meena.p

1 answer

Cyanide process is used for obtaining

asked Dec 22, 2015 by meena.p

1 answer

The actual reducing agent of haemalite in blast furnace is :

asked Dec 22, 2015 by meena.p

1 answer

Semi conductor are refined by the process named as

asked Dec 22, 2015 by meena.p

0 answers

Semi conductor are refined by the process named as

asked Dec 22, 2015 by meena.p

1 answer

In Goldschmidt aluminothermic process . there mite mixture contains

asked Dec 22, 2015 by meena.p

1 answer

The incorrect statement is

asked Dec 22, 2015 by meena.p

1 answer

Electrolytic reduction process is used for the extraction of

asked Dec 22, 2015 by meena.p

1 answer

Which are is useful for the copper extraction ?

asked Dec 22, 2015 by meena.p

1 answer

Calamine is an ore of :

asked Dec 22, 2015 by meena.p

1 answer

Forth floatation process for the concentration of ores is applied for the extraction of

asked Dec 22, 2015 by meena.p

1 answer

The anode in the electrolytic refining of silver contains

asked Dec 22, 2015 by meena.p

1 answer

In the commercial electro chemical process for aluminium extraction the electrolyte used is

asked Dec 22, 2015 by meena.p

1 answer

Which one of the following ore is not concentrated by froth floation process ?

asked Dec 22, 2015 by meena.p

1 answer

The process of converting hydroated alumina into anhydrous alumina is called

asked Dec 22, 2015 by meena.p

1 answer

Cupellation is a process used for the refining of

asked Dec 22, 2015 by meena.p

1 answer

Which method of purification is represented by the following equator ? $T_{i(s)} +2I_{2(g)} \quad \underrightarrow{523 \;K} \quad TiI_{4(g)} \quad \underrightarrow{1700\;K} \quad T_{i(s)} +2I_2(g)$

asked Dec 22, 2015 by meena.p

1 answer

The electrolytic reduction technique is used in the extraction of

asked Dec 22, 2015 by meena.p

1 answer

Zone refining is a method to obtain

asked Dec 22, 2015 by meena.p

1 answer

Poling process is used

asked Dec 22, 2015 by meena.p

1 answer

The impurities present in the mineral are called

asked Dec 22, 2015 by meena.p

2 answers

In thermite process the reducing agent is :

asked Dec 22, 2015 by meena.p

1 answer

Sulphide ores are generally concentrated by

asked Dec 22, 2015 by meena.p

2 answers

Which one of the following is not a basic flux ?

asked Dec 21, 2015 by meena.p

1 answer

Argentine is a mineral of

asked Dec 21, 2015 by meena.p

1 answer

The metal oxide, which cannot be reduced to metal by carbon is

asked Dec 21, 2015 by meena.p

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