Elements that show the properties of both metals and non-metals are called (a) Allotropes (b) Metalloids (c) Alloys (d) Colloids

Elements that show the properties of both metals and non-metals are called (a) Allotropes (b) Metalloids (c) Alloys (d) Colloids
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Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature (D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

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 those of metals and nonmetals D Atoms of a given atomic number that have a specific number of neutrons E The different phases (solid, liquid or gas) of a substance

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 

Which is not a type of elements? (1) Metals (2) Non Metals (3) Metalloids (4) Gases

Description : Which is not a type of elements? (1) Metals (2) Non Metals (3) Metalloids (4) Gases

Last Answer : (3) Metalloids Explanation: Element is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei. There are 118 elements that have been identified. The elements classified as metalloids are boron, silicon, germanium, arsenic, antimony, tellurium and polonium.

In known elements, the maximum number is of [CPMT 1985] (A) Metals (B) Non-metals (C) Metalloids (D) None of these

Description : In known elements, the maximum number is of [CPMT 1985] (A) Metals (B) Non-metals (C) Metalloids (D) None of these

Last Answer : (A) Metals

Define Metals , Non Metals & Metalloids.

Description : Define Metals , Non Metals & Metalloids.

Last Answer : Metals : 1. They are electropositive elements. 2. Their oxides are basic. 3. They tend to lose electrons & form positive ions. 4. They are lustrous , malleable & ductile except Hg which is the ... acidic ) in nature. 3. They are concentrated between the metals & the nonmetals in the periodic table.

Metals, Metalloids and Non-metals

Description : Metals, Metalloids and Non-metals

Last Answer : The elements in the periodic table can also be divided according to whether they are metals, metalloids or non-metals. The zigzag line separates all the elements that are metals from those that ... more metals then non-metals. Metals, metalloids and non-metals all have their own specific properties.

How are the properties of alloys different from those of metals?

Description : How are the properties of alloys different from those of metals?

Last Answer : Copper is reddish and zinc is grayish in colour where as brass which is an alloy of copper and zinc is golden yellow in colour. Iron is a magnetic substance but stainless steel, an alloy of iron is non magnetic.

Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and Structures of alloys.

Description : Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and Structures of alloys.

Last Answer : Alloys are produced by melting or sintering two ore more metals, or metals and a non-metal, together. Alloys possess typical properties inherent in the metallic state. The chemical elements ... an alloy are its individual portions, each having a single structure with its characteristic features.

Babbitt metals used for making bearings are (A) Tin or lead based alloys (B) Short of antifrictional properties (C) Having homogenous microstructure (D) Yellow metals

Description : Babbitt metals used for making bearings are (A) Tin or lead based alloys (B) Short of antifrictional properties (C) Having homogenous microstructure (D) Yellow metals

Last Answer : (A) Tin or lead based alloys

How many of the following mimerals are oxides of metals// metalloids .

Description : How many of the following mimerals are oxides of metals// metalloids .

Last Answer : How many of the following mimerals are oxides of metals// metalloids .

Elements showing properties of both met- als and non-metals are?

Description : Elements showing properties of both met- als and non-metals are?

Last Answer : Metalloids

What are transition elements? (1) Elements whose two outermost shells are incomplete (2) Elements which possess properties of both, metals and non-metals (3) They have eight electrons in the outermost shell (4) Elements whose three outermost shells are incomplete

Description : What are transition elements? (1) Elements whose two outermost shells are incomplete (2) Elements which possess properties of both, metals and non-metals (3) They have eight electrons in the outermost shell (4) Elements whose three outermost shells are incomplete

Last Answer : (1) Elements whose two outermost shells are incomplete

The element which shows large number of allotropes among VIA group elements

Description : The element which shows large number of allotropes among VIA group elements

Last Answer : The element which shows large number of allotropes among VIA group elements A. S B. Se C. Po D. Te

Elements that exist in two or more distinctly different solid forms are known as: w) azeotropes x) allotropes y) isotopes z) isochores

Description : Elements that exist in two or more distinctly different solid forms are known as: w) azeotropes x) allotropes y) isotopes z) isochores

Last Answer :  ANSWER: X -- ALLOTROPES 

Electro deposition of metals i.e. electroplating is never done on (A) Metals (B) Alloys (C) Refractories (D) Non-metals

Description : Electro deposition of metals i.e. electroplating is never done on (A) Metals (B) Alloys (C) Refractories (D) Non-metals

Last Answer : (C) Refractories

Elements which are not distinctively metals and possess some physical properties of non- metals are called

Description : Elements which are not distinctively metals and possess some physical properties of non- metals are called

Last Answer : metalloids.

What are colloids? What are its various properties -Science

Description : What are colloids? What are its various properties -Science

Last Answer : Colloid: A colloid is a heterogeneous mixture whose particles are not as small as solution but they are so small that cannot be seen by naked eye. When a beam of light is passed through a colloid then the path of the light becomes visible. For example milk, smoke etc.

Alloys in which mercury is one of the metals are called (a) Amalgams (b) Emulsions (c) Mixtures (d) Solders

Description : Alloys in which mercury is one of the metals are called (a) Amalgams (b) Emulsions (c) Mixtures (d) Solders

Last Answer : Ans:(a)

Give reason: Metals belonging to the same group form good alloys.

Description : Give reason: Metals belonging to the same group form good alloys.

Last Answer : As metals belonging to the same group in the periodic table have similarities in electronic configuration.

Which of the following is used as base material in Stereolithography (SLA) process? a.Thermoplastics , Metals powders b.Thermoplastics , Eutectic metals. c.Titanium alloys d.Photopolymer

Description : Which of the following is used as base material in Stereolithography (SLA) process? a.Thermoplastics , Metals powders b.Thermoplastics , Eutectic metals. c.Titanium alloys d.Photopolymer

Last Answer : d.Photopolymer

While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ × Tm (where, Tm Melting temperature). (A) 0.25 (B) 0.45 (C) 0.70 (D) 0.95

Description : While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ × Tm (where, Tm Melting temperature). (A) 0.25 (B) 0.45 (C) 0.70 (D) 0.95

Last Answer : (C) 0.70

Which of the following factors affect the mechanical properties of a material under applied loads? a) Content of alloys b) Grain size c) Imperfection and defects d) Shape of material

Description : Which of the following factors affect the mechanical properties of a material under applied loads? a) Content of alloys b) Grain size c) Imperfection and defects d) Shape of material

Last Answer : d) Shape of material

List any four properties of ferrous alloys.

Description : List any four properties of ferrous alloys.

Last Answer : Properties of ferrous alloys:  a) Heat resistant alloy steel - i. hard wearing and offer resistance to large variation in temperatures. ii. corrosion resistance iii. oxidation resistance iv. ... to chromium content. ii. Non-magnetic iii. Good weldability iv. Good heat resistant.

Two types of allotropes of carbon are?

Description : Two types of allotropes of carbon are?

Last Answer : (1) Crystalline (eg : diamond; graphite; fullerene; graphine) (2) Amorphous (eg: coal; char- coal)

Fullerenes form a class of carbon allotropes. The first one to be identified was - (1) C-59 (2) C-60 (3) C-61 (4) C-69

Description : Fullerenes form a class of carbon allotropes. The first one to be identified was - (1) C-59 (2) C-60 (3) C-61 (4) C-69

Last Answer : (2) C-60 Explanation: The first fullerene to be identified was C-60 which has carbon atoms arranged in the shape of a football. Since this looked like the geodesic dome designed by the US architect Buckminster Fuller, the molecule was named fullerene.

Write Applications of Carbons Allotropes with examples?

Description : Write Applications of Carbons Allotropes with examples?

Last Answer : Ans. 1.Graphite is used as a lubricant, soft and slippery. 2. Diamond is used as aabrasive, cutting tool and in jewellery. 3. Fullerene is used in nanotechnology.

Write any two Allotropes of Carbon with one characterstic?

Description : Write any two Allotropes of Carbon with one characterstic?

Last Answer : Ans. Graphite-soft and slippery Diamond: Very Hard & Poor Conductor of electricity

Define Allotropes?

Description : Define Allotropes?

Last Answer : Ans. Substances showing similar chemical properties but different physical properties.

Diamond and Graphite are allotropes of which element?

Description : Diamond and Graphite are allotropes of which element?

Last Answer : Carbon.

What are a list of chemical elements and alloys that can be melted in a typical residential food oven?

Description : What are a list of chemical elements and alloys that can be melted in a typical residential food oven?

Last Answer : I’ve got a slug of a Bismuth Cadmium, Lead, Tin alloy that melts at about 150F , 65C. It melts in hot water. It’s toxic so it’s probably not a good idea to touch it or use kitchen tools.

High resistance electrical heating elements/wire are not made of (A) Maraging steel (B) Nimonic alloys (C) Kanthal wire (D) Nichrome

Description : High resistance electrical heating elements/wire are not made of (A) Maraging steel (B) Nimonic alloys (C) Kanthal wire (D) Nichrome

Last Answer : (A) Maraging steel

Pick out the wrong statement. (A) Alloys are harder than their component elements (B) Presence of silicon in steel decreases its electrical resistance (C) Karbate is an acid resistant material of construction (D) Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C

Description : Pick out the wrong statement. (A) Alloys are harder than their component elements (B) Presence of silicon in steel decreases its electrical resistance (C) Karbate is an acid resistant material of construction ... , a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C

Last Answer : (B) Presence of silicon in steel decreases its electrical resistance

Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are (A) Cobalt, chromium & tungsten (B) Cobalt, chromium & nickel (C) Molybdenum, tungsten & chromium (D) Cobalt, zirconium & molybdenum

Description : Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are (A) Cobalt, chromium & tungsten (B) Cobalt, chromium & nickel (C) Molybdenum, tungsten & chromium (D) Cobalt, zirconium & molybdenum

Last Answer : : Option A

Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which of the following elements is oxidised

Description : Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which of the following elements is oxidised

Last Answer : Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which ... products ? A. Cu B. S C. C D. Zn

Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure

Description : Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure

Last Answer : (A) Is used as an alloying element for both ferrous & non-ferrous alloys

Give reason: Even though silicon is a non-metal it resembles metals in its properties.

Description : Give reason: Even though silicon is a non-metal it resembles metals in its properties.

Last Answer : When red hot silicon reacts with steam, it liberates hydrogen. Even when metals like hot iron, zinc or magnesium react with steam, they liberate hydrogen with their respective metal oxides. Hence silicon resembles metals in some properties.

Chemical properties of Non-Metals

Description : Chemical properties of Non-Metals

Last Answer : Chemical properties of Non-Metals: 1. Non-Metals form electronegative ions in a reaction. 2. Non-Metals react with water to form acidic oxides. 3. Non-Metals react with non-metals to form ionic ... reacts with acids to form salt and Hydrogen. 5. Metals are oxidizing agents as they accept electrons.

Physical properties of Non-Metals

Description : Physical properties of Non-Metals

Last Answer : Physical properties of Non-Metals: 1.Non-Metals are non-lustrous except Iodine. 2.Non-Metals are not ductile nor malleable. 3.Non-Metals are bad conductor of heat & electricity. 4.Non-Metals either ... Metals are generally brittle. 6.Non-metals are not strong. 7.Non-Metals have low tensile strength.

6.What are metalloids? -Science

Description : 6.What are metalloids? -Science

Last Answer : v Metalloids can be defined as chemical elements whose physical and chemical properties fall in between the metal and the non metal categories. Boron, germanium, silicon ... following elements are also known to be classified as metalloids in some circumstances:CarbonAluminiumSeleniumPoloniumAstatin

What are metalloids? Give example.

Description : What are metalloids? Give example.

Last Answer : Elements which are not distinctively metals and possess some physical properties of non- metals are called metalloids.

What is Metalloids ?

Description : What is Metalloids ?

Last Answer : Metalloids: Metalloids are the elements which possess both the properties of metal as well as non-metals. E.g. Silicon, Germanium, Antimony, etc.

Compare chemical properties of metals and non-metals.

Description : Compare chemical properties of metals and non-metals.

Last Answer : Compare chemical properties of metals and non-metals.

What are the chemical properties of metals & non-metals?

Description : What are the chemical properties of metals & non-metals?

Last Answer : metals electropositive, basicity, hard, ductile, malleable, sonorous nonmetals electronegative, acidic, brittle, and not all the other three properties.

What are the chemical properties of metals & non-metals?

Description : What are the chemical properties of metals & non-metals?

Last Answer : metals electropositive, basicity, hard, ductile, malleable, sonorous nonmetals electronegative, acidic, brittle, and not all the other three properties.

Which of the following properties is generally found, in non-metals?' (1) Brittleness (2) Conductivity (3) Ductility (4) Malleability

Description : Which of the following properties is generally found, in non-metals?' (1) Brittleness (2) Conductivity (3) Ductility (4) Malleability

Last Answer : (1) Brittleness Explanation: An important physical property of non metals is that they are brittle and hence cannot be beaten into sheets or drawn into wires. In other words, non-metals are non-malleable and non-ductile. Where stress is applied on nonmetals, they shatter into pieces.

Which of the following are properties is generally found in non-metals

Description : Which of the following are properties is generally found in non-metals

Last Answer : Brittleness

Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress. (A) Ultimate (B) Yield point (C) Proof (D) None of these

Description : Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress. (A) Ultimate (B) Yield point (C) Proof (D) None of these

Last Answer : (C) Proof

What are metalloids? Explain by giving examples. -Chemistry-10

Description : What are metalloids? Explain by giving examples. -Chemistry-10

Last Answer : Metalloids are elements which show some properties of metals and some properties of non-metals. Examples: Silicon, boron, arsenic, antimony, germanium, tellurium, polonium.

Name all metalloids.

Description : Name all metalloids.

Last Answer : Ans: Si, Ge, As, Sb, Te, Po, At

What do you mean by Metalloids? In which block metalloids are found?

Description : What do you mean by Metalloids? In which block metalloids are found?

Last Answer : Ans: elements showing some properties of metals and non metals both are called mettaloids .it are found in P block elements in BW 13 and 18 groups.