Group D - 100 General Science Questions and Answers
Which of the following is a non-metal?
(A) Cobalt
(B) Hydrogen
(C) iron
(D) gold
Correct Answer : B
The producers formed by the combustion of magnesium are -
(A) is acidic
(B) is indifferent
(C) alkaline
(D) all
Correct Answer : C
Explanation :
Therefore, the correct option is (C) Magnesium ribbon on burning in air produces: 'Magnesium oxide, heat and light'.
Which of the following are metals found in free state in the earth's crust?
(A) Ag
(B) Mg
(C) Al
(D) Zn
Correct Answer : A
Which metal can be cut with a knife among sodium, lithium, calcium and nickel?
(A) Sodium
(B) Lithium
(C) calcium
(D) all
Correct Answer : A
Explanation :
Alkali metals (lithium, sodium, potassium) are so soft that they can be cut with a knife. The freshly cut surface is a shiny, silver colour, but this tarnishes quickly to a dull grey as the metal reacts with oxygen and water in the air.
Which of the following metals is available in wire form?
(A) Calcium
(B) Magnesium
(C) Copper
(D) Lead
Correct Answer : C
Gold is used to make jewelery?
(A) 22 carats
(B) 24 carat
(C) 16 carats
(D) 23 carats
Correct Answer : A
Which of the following non-metals are kept immersed in water?
(A) Sulfur
(B) White Phosphorus
(C) Red Phosphorus
(D) Iodine
Correct Answer : B
Silver and copper heat?
(A) are the best drivers
(B) are less conductors
(C) are dielectrics
(D) is the best conductor
Correct Answer : A
Which of the following metals are kept immersed in kerosene?
(A) Sodium
(B) Magnesium
(C) Zinc
(D) all
Correct Answer : A
Which of these metals is found in liquid state?
(A) Iron
(B) Mercury
(C) Silver
(D) Others
Correct Answer : B
Explanation :
Mercury is the only metal that is liquid at normal temperatures.
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