Alnico is a alloy of

iron.

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cobalt.

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nickel.

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aluminium.

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Solution

The correct options are
B cobalt.
C nickel.
D aluminium.
An alloy is a substance containing two or more metals or non-metals.
Alnico is a magnetic alloy of aluminium, cobalt and nickel.

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Question 28
Which among the following alloys contain mercury as one of its constituents?
(a) Stainless steel
(b) Alnico
(c) Solder
(d) Zinc amalgam

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.

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. 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..........

Q. What is alnico?

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Alnico is a alloy of

The correct options are B cobalt. C nickel. D aluminium.An alloy is a substance containing two or more metals or non-metals. Alnico is a magnetic alloy of aluminium, cobalt and nickel.

The correct options are
B cobalt.
C nickel.
D aluminium.
An alloy is a substance containing two or more metals or non-metals.
Alnico is a magnetic alloy of aluminium, cobalt and nickel.