The metals with very low melting points which melts by the temperature of palm are A) Sodium and potassium B) Lead and magnesium C) Aluminium and zinc D) Gallium and caesium

The metals with very low melting points which melts by the temperature of palm are
A) Sodium and potassium
B) Lead and magnesium
C) Aluminium and zinc
D) Gallium and caesium
by

1 Answer

Answer :

D) Gallium and caesium
by

Related questions

Which of the following metals is a solid at room temperature, yet melts in your hand? w) gallium x) cesium y) sodium z) magnesium

Description : Which of the following metals is a solid at room temperature, yet melts in your hand? w) gallium x) cesium y) sodium z) magnesium

Last Answer : ANSWER: W -- GALLIUM

Which of the following metals melts in your hand? w) gallium x) cesium y) sodium z) magnesium

Description : Which of the following metals melts in your hand? w) gallium x) cesium y) sodium z) magnesium

Last Answer : ANSWER: W -- GALLIUM

An atomic clock is based on transitions in - (1) Sodium (2) Caesium (3) Magnesium (4) Aluminium

Description : An atomic clock is based on transitions in - (1) Sodium (2) Caesium (3) Magnesium (4) Aluminium

Last Answer : (2) Caesium Explanation: An atomic clock is a clock device that uses an electronic transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms ... the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.

An atomic clock is based on transitions in (1) Sodium (2) Caesium (3) Magnesium (4) Aluminium

Description : An atomic clock is based on transitions in (1) Sodium (2) Caesium (3) Magnesium (4) Aluminium

Last Answer : Caesium

Which metal among the following melts below 30^0 C. a) copper b)aluminium c)gold d)caesium

Description : Which metal among the following melts below 30^0 C. a) copper b)aluminium c)gold d)caesium

Last Answer : d)caesium

Brazing filler metal used for joining steel plates (A) Melts below the melting points of base metals (B) Melts below 300°C (C) Is copper phosphorous alloy

Description : Brazing filler metal used for joining steel plates (A) Melts below the melting points of base metals (B) Melts below 300°C (C) Is copper phosphorous alloy

Last Answer : (A) Melts below the melting points of base metals

Which of the following alkali metals has highest specific heat? (1) Caesium (2) Rubidium (3) Potassium (4) Lithium

Description : Which of the following alkali metals has highest specific heat? (1) Caesium (2) Rubidium (3) Potassium (4) Lithium

Last Answer : Lithium

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

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

Last Answer : Ans:(c)

Cardiac arrest may occur due to over doses of (A) Sodium (B) Potassium (C) Zinc (D) Magnesium

Description : Cardiac arrest may occur due to over doses of (A) Sodium (B) Potassium (C) Zinc (D) Magnesium

Last Answer : Answer : B

Magnalium is an alloy of-------? A. Magnesium and Lead B. Aluminium and Zinc C. Aluminium and Magnesium (Answer) D. Aluminium and Mercury

Description : Magnalium is an alloy of-------? A. Magnesium and Lead B. Aluminium and Zinc C. Aluminium and Magnesium (Answer) D. Aluminium and Mercury

Last Answer : C. Aluminium and Magnesium (Answer)

Which of the following is the correct arrangement of the given metals in ascending order of their reactivity? Zinc, Iron, Magnesium, Sodium A) Zinc > Iron > Magnesium > Sodium B) Sodium > Magnesium > Iron > Zinc C) Sodium > Zinc > Magnesium > Iron D) sodium > Magnesium > Zinc > Iron

Description : Which of the following is the correct arrangement of the given metals in ascending order of their reactivity? Zinc, Iron, Magnesium, Sodium A) Zinc > Iron > Magnesium > Sodium B) Sodium > Magnesium > Iron > Zinc C) Sodium > Zinc > Magnesium > Iron D) sodium > Magnesium > Zinc > Iron

Last Answer : D) sodium > Magnesium > Zinc > Iron

Which of the following metals in not used for coating of the base metal to guard it against corrosion? (A) Lead (B) Cadmium (C) Magnesium (D) Aluminium

Description : Which of the following metals in not used for coating of the base metal to guard it against corrosion? (A) Lead (B) Cadmium (C) Magnesium (D) Aluminium

Last Answer : (C) Magnesium

Which of the following metal has the lowest melting point? (1) Lead (2) Lithium (3) Potassium (4) Sodium

Description : Which of the following metal has the lowest melting point? (1) Lead (2) Lithium (3) Potassium (4) Sodium

Last Answer : (3) Potassium Explanation: Here, Potassium has the lowest melting point in the given options i.e. 63.5° C. Helium has the lowest melting point of -272.2° C.

Ceramic nuclear metals compared to solid nuclear metals have (A) Higher melting points (B) Low strength at high temperature (C) More chances of radiation damage (D) Poorer corrosion resistance

Description : Ceramic nuclear metals compared to solid nuclear metals have (A) Higher melting points (B) Low strength at high temperature (C) More chances of radiation damage (D) Poorer corrosion resistance

Last Answer : (A) Higher melting points

Change in volume of metals from absolute zero temperature to their melting points is (A) Almost same for all metals (B) Different for different metals (C) Less for low melting point metals (D) Less for high melting point metals

Description : Change in volume of metals from absolute zero temperature to their melting points is (A) Almost same for all metals (B) Different for different metals (C) Less for low melting point metals (D) Less for high melting point metals

Last Answer : (A) Almost same for all metals

Which of the following is not soluble in water? (1) Lead Sulphate (2) Zinc sulphate (3) Potassium sulphate (4) Sodium sulphate

Description : Which of the following is not soluble in water? (1) Lead Sulphate (2) Zinc sulphate (3) Potassium sulphate (4) Sodium sulphate

Last Answer : (2) Zinc sulphate Explanation: Lead sulfate (PbSO4) is a white crystalline solid. It is insoluble in water and sinks in it. It is often seen in the plates/electrodes of car batteries, as it is ... is discharged. It is also known as fast white, milk white, sulfuric acid lead salt or anglesite.

Which of the following is not soluble in water ? (1) Lead Sulphate (2) Zinc sulphate (3) Potassium sulphate (4) Sodium sulphate

Description : Which of the following is not soluble in water ? (1) Lead Sulphate (2) Zinc sulphate (3) Potassium sulphate (4) Sodium sulphate

Last Answer : Zinc sulphate

The part of a fuse that melts and opens the circuit is made of _____________. A. copper and antimony B. steel and babbitt C. aluminum or beryllium alloy D. zinc or an alloy of tin and lead

Description : The part of a fuse that melts and opens the circuit is made of _____________. A. copper and antimony B. steel and babbitt C. aluminum or beryllium alloy D. zinc or an alloy of tin and lead

Last Answer : Answer: D

The metals commonly used for electroplating are – (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium

Description : The metals commonly used for electroplating are – (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium

Last Answer : (2) Chromium, Copper and Nickel Explanation: The process of electroplating takes place as metals in ionic form move from a positive to negative electrode. An electric current passing through the ... ability of metal objects. Plating protects by one of two ways, either sacrificially or mechanically.

Which of the following liquid metals has the highest thermal conductivity? (A) Molten sodium (B) Molten lead (C) Mercury (D) Molten potassium

Description : Which of the following liquid metals has the highest thermal conductivity? (A) Molten sodium (B) Molten lead (C) Mercury (D) Molten potassium

Last Answer : (A) Molten sodium

The metals commonly used for electroplating are (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium

Description : The metals commonly used for electroplating are (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium

Last Answer : Chromium, Copper and Nickel

Why are potassium and caesium, rather than lithium used in photoelectric cells ?

Description : Why are potassium and caesium, rather than lithium used in photoelectric cells ?

Last Answer : Ans. Potassium and caesium have much lower ionization enthalpy than that of lithium. As a result, these metals on exposure to light, easily emit electrons but lithium does not. Therefore, K and Cs rather than Li are used in photoelectric cells

The atmospheric temperature during melting of ice/snow (in the atmosphere) (A) Decreases (B) Increases (C) Remain same (D) May increase or decrease; depends on the altitude where snow melts Answer

Description : The atmospheric temperature during melting of ice/snow (in the atmosphere) (A) Decreases (B) Increases (C) Remain same (D) May increase or decrease; depends on the altitude where snow melts Answer

Last Answer : A) Decreases

The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Description : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Last Answer : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` ... +Zn rarr Mg+ZnO` D. `ZnO+Mg rarrZn+MgO`

The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Description : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Last Answer : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a ... gt 500^(@)C " but " lt 1000^(@)C`

The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Description : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Last Answer : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a ... C. `500^(@)C` D. `1200^(@)C`

Philosopher’s wool is chemically - (1) Aluminium oxide (2) Magnesium oxide (3) Zinc oxide (4) Calcium oxide

Description : Philosopher’s wool is chemically - (1) Aluminium oxide (2) Magnesium oxide (3) Zinc oxide (4) Calcium oxide

Last Answer : (3) Zinc oxide Explanation: Philosopher's Wool is chemically zinc oxide.

Philosopher’s wool is chemically (1) Aluminium oxide (2) Magnesium oxide (3) Zinc oxide (4) Calcium oxide

Description : Philosopher’s wool is chemically (1) Aluminium oxide (2) Magnesium oxide (3) Zinc oxide (4) Calcium oxide

Last Answer : Zinc oxide

Magnalium is an alloy of (1) Aluminium and Magnesium (2) Magnesium and Tin (3) Aluminium and Zinc (4) Manganese and Magnesium

Description : Magnalium is an alloy of (1) Aluminium and Magnesium (2) Magnesium and Tin (3) Aluminium and Zinc (4) Manganese and Magnesium

Last Answer : Aluminium and Magnesium

Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Description : Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Last Answer : (c) phosphorus, potassium, sulphur, calcium

Which of the following is not a “Macronutrient” required for Plant Nutrition? a. Nitrogen b. Magnesium c. Potassium d. Zinc

Description : Which of the following is not a “Macronutrient” required for Plant Nutrition? a. Nitrogen b. Magnesium c. Potassium d. Zinc

Last Answer : a. Nitrogen b. Magnesium c. Potassium d. Zinc

Micanite is a form of (A) Built up mica. (B) Hydrated potassium aluminium silicate. (C) Magnesium mica. (D) Calcium mica.

Description : Micanite is a form of (A) Built up mica. (B) Hydrated potassium aluminium silicate. (C) Magnesium mica. (D) Calcium mica.

Last Answer : (A) Built up mica.

Which metal is extracted from sea water? (1) Potassium (2) Magnesium (3) Aluminium (4) Beryllium

Description : Which metal is extracted from sea water? (1) Potassium (2) Magnesium (3) Aluminium (4) Beryllium 

Last Answer : Magnesium

Which one of the following metals does not form amalgam? (1) Zinc (2) Copper (3) Magnesium (4) Iron

Description : Which one of the following metals does not form amalgam? (1) Zinc (2) Copper (3) Magnesium (4) Iron

Last Answer : (4) Iron Explanation: The definition of an amalgam is a mixture of metals and mercury, which can be man-made or can be naturally occurring.

Which of the following is the lightest of engineering metals? (A) Magnesium (B) Aluminium (C) Titanium (D) Tin

Description : Which of the following is the lightest of engineering metals? (A) Magnesium (B) Aluminium (C) Titanium (D) Tin

Last Answer : (A) Magnesium

Mendeleev proposed the existence of an unknown element that he called eka-aluminum. The element is now called: w) magnesium x) silicon y) gallium z) germanium

Description : Mendeleev proposed the existence of an unknown element that he called eka-aluminum. The element is now called: w) magnesium x) silicon y) gallium z) germanium

Last Answer : ANSWER: C -- GALLIUM

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 of the following metals does NOT react with oxygen even at a high temperature? (1) Aluminium (2) Silver (3) Lead (4) line

Description : Which of the following metals does NOT react with oxygen even at a high temperature? (1) Aluminium (2) Silver (3) Lead (4) line

Last Answer : (2) Silver Explanation: Silver and gold do not react with oxygen even at high temperatures as they are less reactive and are placed below the reactivity series.

Which of the following commercial metals is most abundantly found in India? (A) Copper (B) Aluminium (C) Nickel (D) Zinc

Description : Which of the following commercial metals is most abundantly found in India? (A) Copper (B) Aluminium (C) Nickel (D) Zinc

Last Answer : (B) Aluminium

Which one occupies the lowermost position in the electromotive series of metals? (A) Aluminium (B) Noble metals (Ag, Pt, Au) (C) Zinc (D) Alkali metals (K, Na, Li)

Description : Which one occupies the lowermost position in the electromotive series of metals? (A) Aluminium (B) Noble metals (Ag, Pt, Au) (C) Zinc (D) Alkali metals (K, Na, Li)

Last Answer : (B) Noble metals (Ag, Pt, Au)

Which of the following metals is not subjected to electrolytic refining/purification? (A) Copper (B) Zinc (C) Tin (D) Aluminium

Description : Which of the following metals is not subjected to electrolytic refining/purification? (A) Copper (B) Zinc (C) Tin (D) Aluminium

Last Answer : (C) Tin

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

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

Is zinc less reactive with potassium based from activity series of metals?

Description : Is zinc less reactive with potassium based from activity series of metals?

Last Answer : Yes, zinc is LESS reactive than potassium based on the activityseries.

Alcohol dehydrogenase from liver contains (A) Sodium (B) Copper (C) Zinc (D) Magnesium

Description : Alcohol dehydrogenase from liver contains (A) Sodium (B) Copper (C) Zinc (D) Magnesium

Last Answer : Answer : C

Antacid tablets consist of – (1) Hydroxides of sodium, magnesium and aluminium (2) Hydroxides of magnesium and aluminium (3) Hydroxides of sodium and aluminium (4) Hydroxides of magnesium and sodium

Description : Antacid tablets consist of – (1) Hydroxides of sodium, magnesium and aluminium (2) Hydroxides of magnesium and aluminium (3) Hydroxides of sodium and aluminium (4) Hydroxides of magnesium and sodium

Last Answer : (2) Hydroxides of magnesium and aluminium Explanation: An antacid is a base which neutralizes stomach acidity. The most common of these bases are hydroxides, carbonates, or bicarbonates such as Aluminum hydroxide, Calcium. carbonate, Magnesium carbonate, Magnesium hydroxide, and Sodium bicarbonate.

Why are cimetidine or ranitidine better antacids than sodium bicarbonate or magnesium or aluminium hydroxide ?

Description : Why are cimetidine or ranitidine better antacids than sodium bicarbonate or magnesium or aluminium hydroxide ? 

Last Answer : Ans. If excess of NaHCO3 or Mg (OH)2 or Al (OH)3 is used, it makes the stomach alkaline and thus triggers the release of even more HCl. In contrast, cimetidine or ranitidine prevent the interaction of histamine with the receptor cells in the stomach wall and thus release lesser amount of HCl. 

Antacid tablets consist of (1) Hydroxides of sodium, magnesium and aluminium (2) Hydroxides of magnesium and aluminium (3) Hydroxides of sodium and aluminium (4) Hydroxides of magnesium and sodium

Description : Antacid tablets consist of (1) Hydroxides of sodium, magnesium and aluminium (2) Hydroxides of magnesium and aluminium (3) Hydroxides of sodium and aluminium (4) Hydroxides of magnesium and sodium

Last Answer : Hydroxides of magnesium and aluminium

Sodium chloride, potassium chloride, magnesium oxide are examples of molecules with (a) Covalent bonding (b) Ionic bonding (c) Metallic bonding (d) Hydrogen bonding

Description : Sodium chloride, potassium chloride, magnesium oxide are examples of molecules with (a) Covalent bonding (b) Ionic bonding (c) Metallic bonding (d) Hydrogen bonding

Last Answer : Ans:(b)

Which of the following elements has the lowest melting point? (1) Bromine (2) Zinc (3) Calcium (4) Lead

Description : Which of the following elements has the lowest melting point? (1) Bromine (2) Zinc (3) Calcium (4) Lead

Last Answer : (1) Bromine Explanation: Bromine is a chemical element with symbol Br and atomic number 35. Thus, the melting and boiling points of bromine are intermediate between those of chlorine and iodine.