When corrosion of silver occurs black coating appears. The black coating indicates …………….
A) silver sulphate
B) silver oxide
C) sliver sulphide
D) sliver chloride
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It is light resistant to corrosion good conductor of heat. It is used to manufacture aircraft utensils and wires.
(B) Aluminum
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Corrosion of iron occurs in the presence of …………….. and……………..
B) air, water
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A common metal which is highly resistant to corrosion is ……………..
Correct option is B) Aluminium
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Name the part of the eye that appears black.
Correct option is D) pupil
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Evaluate resistance for the following colour coded resistors: i. Yellow – Violet – Black – Silver
i. Given: Yellow – Violet – Black – Silver To find: Value of resistance Formula: Value of resistance = (xy × 10z ± T%)Ω Colour Yellow (x) Violet (y) Black (z) Sliver (T%) Code 4 7 0 ±10 Hence x = 4, y = 7,...
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A vector can be represented as a directed line segment in which length indicates ……………….. and arrow indicates ……………..
A) magnitude, direction
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A given resistor has the following colour scheme of the various strips on it: Brown, black, green and silver. Its value in ohm is
(C) 1.0 × 106 + 10%
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Find out the correct sentence. A) Double fertilization occurs in Angiosperms B) Double fertilization occurs in Gymnosperms
A) Double fertilization occurs in Angiosperms
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a – Meiosis occurs in two stages b – Even though meiosis has two divisions chromosomal division occurs only once.
A) Both ‘a’ & ‘b’ are true, ‘b’ explains ‘a'
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A common metal which is highly resistant to corrosion is:
Correct Answer - C Correct Answer - c
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