Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) stainless steel
(b) brass.

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Solution

Alloy Major metals Composition

Stainless steel Iron and chromium Fe = 75%
Ni = 8–10 %
Cr = 15–18%
C = 0.5–1%

Brass Copper and zinc Cu = 55 – 95%
Zn = 5 – 45%

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Similar questions

List - A	List - B	List - C
A. Stainless Steel	a. Iron + nickel + cobalt + aluminium	i. Electrical contact part
B. Alnico	b. Iron + carbon + chrominum + nickel	ii. Sports medal
C. Invar Steel	c. Copper + zinc + tin	iii. Surgical instruments
D. Brass	d. Iron + carbon + nickel (large quantity)	iv. Aeroplane body
	e. Aluminium + copper + magnesium + manganese	v. Permanent magnets
	f. Copper + zinc	vi. Precision measuring instruments

The figure represents the reactivity of metals then which of the following are correct?

(i) Sodium is more reactive than magnesium.

(ii) Magnesium ad aluminium metals displace lead.

(iii) Magnesium and aluminium metals displace calcium.

(iv) Iron and tin metals can displace magnesium.

(v) Most reactive metal is sodium.

(vi) Gold is least reactive.

(vii) Calcium and zinc metals displace iron.

Choose plant’s micronutrients and macronutrients from the following.

Iron, Chlorine, Sulphur, Copper, Nitrogen, Calcium, Manganese, Potassium, Zinc. Magnesium, Molybdenum, Phosphorus.

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