Which of the following metals is in a liquid state at normal room temperature? (a) Sodium (b) Radium (c) Gallium (d) Silicon

Which of the following metals is in a liquid state at normal room temperature? (a) Sodium (b) Radium (c) Gallium (d) Silicon
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Last Answer : 29.76 °C or 85.6°F is the melting point of Gallium The Boiling Point is 4044°F (2229°C).

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Description : At which temperature does the gallium melt ? -Science

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The boiling point of normal paraffinic (pron: pair-ah-FIN-ik) hydrocarbons increases with the number of carbon atoms per molecule. What is the smallest number of carbon atoms a normal paraffinic hydrocarbon can have and still be a liquid at room temperature (70-75 degrees Fahrenheit) and 1 atmosphere pressure.

Description : The boiling point of normal paraffinic (pron: pair-ah-FIN-ik) hydrocarbons increases with the number of carbon atoms per molecule. What is the smallest number of carbon atoms a normal paraffinic ... and still be a liquid at room temperature (70-75 degrees Fahrenheit) and 1 atmosphere pressure.

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Why is silicon an insulator at room temperature?

Description : Why is silicon an insulator at room temperature?

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When a sample of germanium and silicon having same impurity density are kept at room temperature then Resistivity of silicon will be higher than that of germanium, Why?

Description : When a sample of germanium and silicon having same impurity density are kept at room temperature then Resistivity of silicon will be higher than that of germanium, Why?

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At room temperature, an intrinsic silicon crystal acts approximately as ……

Last Answer : At room temperature, an intrinsic silicon crystal acts approximately as An insulator.

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

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On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because – (1) metals have higher thermal capacity than plastics (2) plastics have a lower density than metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Description : On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because - (1) metals ... metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

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The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) (A) T (B) 1/T (C) T2 (D) 1/T2

Description : The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) (A) T (B) 1/T (C) T2 (D) 1/T2

Last Answer : A) T

Which of the following metals cannot be hot worked at room temperature? (A) Zinc (B) Nickel (C) Lead (D) Tin

Description : Which of the following metals cannot be hot worked at room temperature? (A) Zinc (B) Nickel (C) Lead (D) Tin

Last Answer : Option B

Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B Elements of Group 16 occur as cations in ionic compounds. C Oxides of elements in Groups 16 and 17 are basic. D The halogens (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.

Description : Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B ... (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.

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

On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : (1) metals have higher thermal capacity than plastics (2) plastics have a lower density than metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Description : On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : (1) metals ... metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

Last Answer : metals are good conductors of heat

What is the sign of gallium ?

Description : What is the sign of gallium ?

Last Answer : Ga Galliav's signal

What is the number of electrons in gallium ?

Description : What is the number of electrons in gallium ?

Last Answer : The number of electrons in gallium is 31 .

Is gallium a cation or anion?

Description : Is gallium a cation or anion?

Last Answer : Gallium is a metallic element. It forms cations Ga3+ and Ga+

What can gallium create?

Description : What can gallium create?

Last Answer : The chemical element gallium can create gallium compounds.Gallium nitrate is but one. There are many gallium compounds thatare critical to the semiconductor industry, and life as we know itgrinds to a halt without semiconductors.

How many elements does gallium have?

Description : How many elements does gallium have?

Last Answer : Gallium is a chemical element. One might say it has one element.

What kind of bond is gallium bromide?

Description : What kind of bond is gallium bromide?

Last Answer : Gallium bomide has an ionic bond.

How much gallium is used a year?

Description : How much gallium is used a year?

Last Answer : Approx. 400 t gallium is used in a year.

Which is a property that Mendeleev's predicted for gallium?

Description : Which is a property that Mendeleev's predicted for gallium?

Last Answer : Examples: density, melting point, atomic weight, density and formula of oxide.

Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table? (1) Scandium (2) Gallium (3) Titanium (4) Germanium

Description : Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table? (1) Scandium (2) Gallium (3) Titanium (4) Germanium

Last Answer : (2) Gallium

One of the first satellite system catering personal based communications services scheduled for operation. A. Iridium system B. Plutonium system C. Indium system D. Gallium system

Description : One of the first satellite system catering personal based communications services scheduled for operation. A. Iridium system B. Plutonium system C. Indium system D. Gallium system

Last Answer : A. Iridium system

It is the made from semiconductor material such as aluminum-galium-arsenide or gallium-arsenide-phosphide. A. APD B. Injection laser diode C. Light emitting diode D. Positive-intrinsic-negative

Description : It is the made from semiconductor material such as aluminum-galium-arsenide or gallium-arsenide-phosphide. A. APD B. Injection laser diode C. Light emitting diode D. Positive-intrinsic-negative

Last Answer : C. Light emitting diode

__________ is a donor impurity for semi-conductors. (A) Boron (B) Antimony (C) Gallium (D) None of these

Description : __________ is a donor impurity for semi-conductors. (A) Boron (B) Antimony (C) Gallium (D) None of these

Last Answer : (B) Antimony

What is/are oxidation states of gallium? Give its reason also.

Description : What is/are oxidation states of gallium? Give its reason also.

Last Answer : Ans:+1 and +3 ,due to inert pair effect

The domain in a gallium-arsenide semiconductor has what type of electrical field when compared to the other regions across the body of a semiconductor?

Description : The domain in a gallium-arsenide semiconductor has what type of electrical field when compared to the other regions across the body of a semiconductor?

Last Answer : A field of much greater intensity.

The point on the current curve of a gallium-arsenide semiconductor at which it begins to exhibit negative resistance is called what?

Description : The point on the current curve of a gallium-arsenide semiconductor at which it begins to exhibit negative resistance is called what?

Last Answer : Threshold.

Which element is associated with the term "galvanized"? w) gallium x) zinc y) mercury z) nickel

Description : Which element is associated with the term "galvanized"? w) gallium x) zinc y) mercury z) nickel

Last Answer : ANSWER: X -- ZINC

Hydrofluoric acid is not kept in glass bottles because it reacts with - (1) visible light (2) silicon dioxide of glass (3) aluminium oxide of glass (4) sodium oxide of glass

Description : Hydrofluoric acid is not kept in glass bottles because it reacts with - (1) visible light (2) silicon dioxide of glass (3) aluminium oxide of glass (4) sodium oxide of glass

Last Answer : (2) silicon dioxide of glass