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( 6320 viewed : 41 like : 0 comments ) Aluminium is used for making cooking uten¬sils. Which of the following properties of alu¬minium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)

Answer
Answer: d

2. The most abundant metal in the earth’s crust is
(a) Iron
(b) Aluminium
(c) Calcium
(d) Sodium

Answer
Answer: b

3. The poorest conductor of heat among metals is
(a) Lead
(b) Mercury
(c) Calcium
(d) Sodium

Answer
Answer: a

4. Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
(a) Sonorousness
(b) Malleability
(c) Ductility
(d) Conductivity

Answer
Answer: a

5. Al2O3 + 2NaOH → …… + H2O
(a) Al(OH)3
(b) Na2O
(c) NaAlO2
(d) AlNaO2

Answer
Answer: c [ 2025-02-19T00:53:23Z ] :flashminiupdate:2025-07-13

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