____________ is used to make powerful magnets.

Steel

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Cobalt

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Alnico

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Bronze

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Solution

The correct option is C
Alnico

To make powerful magnets, an alloy called 'Alnico' is used. Alnico is an alloy of aluminum (Al), nickel (Ni) and cobalt (Co). The name 'Alnico' is derived from the symbols of these elements.

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Similar questions

Match the alloys of column I with their constituents of column II

Alloys	Constituents
(a) Nichrome	(i) Aluminium + Nickel + Cobalt
(b) Bronze	(ii) Copper + Tin
(c) Alnico	(iii) Nickel + Chromium + Iron

Q. Alnico is an alloy used to make permanent magnets.
(a) Which is the metal present in Alnico in addition to iron, nickel and cobalt?
(b) Compounds in the process of extraction of aluminium are given:

A l_{2} O_{3} \to A l (O H)_{3} \to N a_{3} A l O_{3} \to A l_{2} O_{3} . 2 H_{2} O

If there is any mistake in the order of the compounds, write them in the correct order.
(c) "To extract

A l

from its ore, carbon is not used as a reducing agent". Justify the statement.

Which of the following is not attracted by a magnet ?

(a) steel

(b) cobalt

(d) nickel

Q. Alloys containing iron are given. Find out a, b, c, and d.

Steels	Components	Uses
i. Alnico	..........a.........	..........b..........
ii. ......c.......	Fe , Cr , Ni , C	For making utensils
iii. Nichrome	Fe, Cr , Ni , C	.........d..........

At some temperature T, a bronze pin is a little large to fit into a hole drilled in a steel block. The change in temperature required for an exact fit is minimum when

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____________ is used to make powerful magnets.

The correct option is C Alnico To make powerful magnets, an alloy called 'Alnico' is used. Alnico is an alloy of aluminum (Al), nickel (Ni) and cobalt (Co). The name 'Alnico' is derived from the symbols of these elements.

The correct option is C
Alnico

To make powerful magnets, an alloy called 'Alnico' is used. Alnico is an alloy of aluminum (Al), nickel (Ni) and cobalt (Co). The name 'Alnico' is derived from the symbols of these elements.