Description : Main source of lead is galena `(PbS)`. It is converted to Pb by `:` Self`-` reduction process is `:`
Last Answer : Main source of lead is galena `(PbS)`. It is converted to Pb by `:` Self`-` reduction process is `:` A. A B. B C. both D. none
Description : For how many metals of `10^(th)`12 th and `14^(th)` groups in periodic chart, Extraction is possible by self - reduction mrthod ?
Last Answer : For how many metals of `10^(th)`12 th and `14^(th)` groups in periodic chart, Extraction is possible by self - reduction mrthod ?
Description : Consider the following statements - 1. Cuba is considered the sugar bowl of the world 2. Sugar was a rare commodity in Europe till the middle ages 3. Honey is a rich source of vitamins and minerals 4. All green plants synthesize sugar ... is/are true? (a) Only 1 (b) 1 and 3 (c) 2 and 3 (d) 2 and 4
Last Answer : Ans:(d)
Description : Biluveridin is converted to bilirubin by the process of (A) Oxidation (B) Reduction (C) Conjugation (D) Decarboxylation
Last Answer : Answer : B
Description : Cooking oil can be converted into vegetable ghee by the process of 1. hydrogenation 2. distillation 3. crystallisation 4. reduction The correct processes are: (a) 1 and 4 (b) 2 and 4 (c) 1 and 3 (d) 3 and 4
Last Answer : Ans:(a)
Description : Liquid hydrocarbons are converted to low molecular weight gaseous hydrocarbons by a process known as (a) hydrogenation (b) reforming (c) cracking (d) reduction
Last Answer : Ans:(c)
Description : Highly electropositive metals can not be extracted by carbon reduction process because these :
Last Answer : Highly electropositive metals can not be extracted by carbon reduction process because these : A. Metals ... D. Loss of metal is more by vaporisation
Description : Can space junk be mined for metals and minerals?
Last Answer : Right now the cost to do it would outweigh what they could get for it. And it can also be pretty dangerous I would guess, too. It would be a good idea to get it down. What kinds of materials are ... I could imagine how some of our frenemies would feel if we snaked some of their old stuff to look at.
Description : After all of the minerals/metals are mined in the planet then what?
Last Answer : Next, we start mining the landfills.
Description : Minerals, metals, and fossil fuels are which type of resources of energy?
Last Answer : Minerals, metals, and fossil fuels are which type of resources of energy? A. Renewable B. Non-renewable C. Biodegradable D. Degradable
Description : Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following
Last Answer : Minerals from which metals can be extracted economically and easily are called ores. The ... . D. roasting followed by electrolytic reduction.
Last Answer : Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from ... 2)S+2Cu_(2)O rarr 6Cu+SO_(2)`
Description : Is it true that many metals are extracted from ores that contain sulfide minerals?
Last Answer : Feel Free to Answer
Description : Which one of the following does not deal with export promotion? (1) Trade Development Authority (2) Minerals and Metals Trading Corporation (3) Cooperative Marketing Societies (4) Slate Trading Corporation of India
Last Answer : (3) Cooperative Marketing Societies Explanation: According to the Reserve Bank of India, co-operative marketing is a co-operatove association of cultivators formed primarily for the purpose of helping ... based. The commodity-based societies related to grapes, oranges, banana, pomegranate, etc.
Description : Minerals and metals are (a) biodegradable resources (b) renewable (c) non-renewable (d) renewable and non-renewable resources
Last Answer : (d) renewable and non-renewable resources.(1992)
Description : Cinnabar, pyrite and galena are minerals which consist of one or more metals combined with the same element. Which one of the following is the element that is common to all three of these minerals? Is it: w) iron x) copper y) sulfur z) sodium
Last Answer : ANSWER: C-- SULFUR
Description : What energy is converted into heat energy when heat is applied at the junction of two different metals ?
Last Answer : When heat is applied at the junction of two different metals, heat energy is converted into electrical energy.
Description : Basic metals can be converted into gold by ? A. Heating B. Beating C. Artificial nuclear radioactivity (Answer) D. Chemical reaction
Last Answer : C. Artificial nuclear radioactivity (Answer)
Description : Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides can be easily reduced .
Last Answer : Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides ... -1 : is false , statement-2 : is true
Description : A sulphide ore is first converted into its oxide before reduction. This is done because :
Last Answer : A sulphide ore is first converted into its oxide before reduction. This is done because : A ... oxide is generally less stable than the metal sulphide
Description : In mammals other than higher primates uric acid is converted by (A) Oxidation to allantoin (B) Reduction to ammonia (C) Hydrolysis to ammonia (D) Hydrolysis to allantoin
Last Answer : Answer : A
Description : UTP is converted to CTP by (A) Methylation (B) Isomerisation (C) Amination (D) Reduction
Last Answer : Answer : C
Description : d-UMP is converted to TMP by (A) Methylation (B) Decarboxylation (C) Reduction (D) Deamination
Description : HMG-CoA is converted to mevalonate by reduction catalysed by (A) HMG-CoA synthetase (B) HMG-CoA reductase (C) Mevalonate kinase (D) Thiolase
Description : Among the sulphide oers of Ag,Hg,Pb,Fe Cu anZn how many of them can be extracted by self reduction process.
Last Answer : Among the sulphide oers of Ag,Hg,Pb,Fe Cu anZn how many of them can be extracted by self reduction process.
Description : How many of the following metals can be extracted buy carbon reduction method ? Na,Al,Mg,Sn,Fe,Pb,Zn,Ca
Last Answer : How many of the following metals can be extracted buy carbon reduction method ? Na,Al,Mg,Sn,Fe,Pb,Zn,Ca
Description : How many of the given metals can be obtained by carbon reduction in their extractive metallurgy
Last Answer : How many of the given metals can be obtained by carbon reduction in their extractive metallurgy
Description : Which of the following reduction reactions are actually employed in commercial extraction of metals ?
Last Answer : Which of the following reduction reactions are actually employed in commercial extraction of metals ? A. `Fe_(2 ... + 2CuO rarr 3Cu + SO_(2) uparrow `
Description : Statement-1: Auto reduction of ores is used for cinnabar, copper glance and Galena ores Statement-2:The sulphide ores of these metals react with their
Last Answer : Statement-1: Auto reduction of ores is used for cinnabar, copper glance and Galena ores Statement-2: ... Statement-1 is false but Statement -2 is true
Description : Which of the following reduction reactions are actually employed in commercial extraction of metals?
Last Answer : Which of the following reduction reactions are actually employed in commercial extraction of metals? A. `Fe_(2)O_(3 ... (2)S + 2CuO rarr 6Cu + SO_(2)`
Description : Standard reduction potential of alkali metals have high negative values.
Last Answer : Explain : Standard reduction potential of alkali metals have high negative values.
Description : Which of the following metals is NOT obtained by reduction using carbon? (1) Copper (2) Sodium (3) Iron (4) Zinc
Last Answer : (2) Sodium Explanation: Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal.
Description : Exposure to SO2 containing chimney gases results in the (A) Reduction in strength of leather & cloth (B) Acceleration of corrosion rates of metals (C) Increased drying & hardening time of paints (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Which pair of metals constitutes the lightest metal and the heaviest metal, respectively? -Do You Know?
Last Answer : answer:
Description : Which pair of metals are supposed to constitute the internal core of the earth?
Last Answer : Nickel and Iron
Description : Which pair of metals constitutes the lightest metal and the heaviest metal, respectively?
Last Answer : Lithium and osmium
Description : Which one of the following best defines the word allotropes ? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between ... a specific number of neutrons E The different phases (solid, liquid or gas) of a substance
Last Answer : A Different structural forms of an element
Description : 1. Which alloy is used for making magnets for hearing aids? 2. Which year is celebrated as International Year of Biodiversity? 3. The United Nations declared 2011 as which International Year? ... Which is the largest island? 20. With which did the Civil Disobedience Movement in India commence?
Last Answer : Answer : 1. Alinco 2. 2010 3. Forest 4. Nickel and Iron5. Humayun 6. Nerves 7. The constitutionality of laws 8. Force and Pressure 9. Cirrus 10. Sasaram 11. Decreasing 12. North-East ... Lord Hardinge 16. National Development Council 17. Acetone 18. Suez Canal 19. Kalatdeitnunat 20. The Dandi March
Description : Good pair of computer headphone with noise reduction?
Last Answer : The best noise cancelling headphones to get if price is not an issues is Bose noise cancelling headphones. Bose is know for its exceptional quality in headphones.
Description : If the more negative standard reduction potential of a redox pair, the greater the tendency to (A) To lose electrons (B) To gain electrons (C) To lose/gain electrons (D) To lose and gain electrons
Last Answer : A
Description : How many genes out of a gene pair does a plant that is self pollinated get from each of its parents?
Last Answer : one from each parent out of a gene pair. Because each parentscontributes fifty - fifty percent in the new offspring.
Description : What is the process that result in the breakdown of rocks and minerals in situ ? -Do You Know?
Description : `NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` minerals are expected because `:`
Last Answer : `NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` ... D. Sillccious impurities settle down on the bottom.
Description : In the froth floatation process for the purification of minerals the particles float because
Last Answer : In the froth floatation process for the purification of minerals the particles float because A. they ... by oil D. They bear an electrostatic charge.
Description : What is The process of changing the hard parts of the remains of the animal or plant with minerals?
Last Answer : It's called 'calcification'
Description : What is the process that result in the breakdown of rocks and minerals in situ?
Last Answer : Weathering
Description : Eutrophication is the process of enrichment of surface water bodies with — a. Minerals b. Nutrients c. Salts d. Vegetation
Last Answer : b. Nutrients
Description : Process in which light energy is converted into chemical energy (organic compounds) is called
Last Answer : Process in which light energy is converted into chemical energy (organic compounds) is called
Description : What is the energy stored in food converted into a form of energy that cells can use is what process?
Last Answer : What is the answer ?
Description : Histidine is converted to histamine through the process of (A) Transamination (B) Decarboxylation (C) Oxidative deamination (D) Urea cycle