Pb + Conc.HNO₃ gives

Pb + Conc.HNO₃ gives

Options

(a) Pb(NO₃)₂ + NO₂ (b) PbNO₃ + NO (c) Pb(NO₃)₄ + NO₃ (d) Pb(NO₃)₃ + N₂O

Correct Answer:

Pb(NO₃)₂ + NO₂

Explanation:

No explanation available. Be the first […]

The lusture of a metal is due to

The lusture of a metal is due to

Options

(a) its chemical inertness (b) its high polishing (c) its high density (d) presence of free electrons

Correct Answer:

presence of free electrons

Explanation: […]

Diamond is used I glass cutting due to its

Diamond is used I glass cutting due to its

Options

(a) high metallic bonding (b) extreme hardness (c) low metallic bonding (d) high refractive index

Correct Answer:

extreme hardness

Explanation:

No explanation available. […]

Glass is soluble in

Glass is soluble in

Options

(a) HClO₄ (b) Hf (c) aqua regia (d) H₂SO₄

Correct Answer:

Hf

Explanation:

Unlike other halogen acids, HF acid attacks silica and glass. Glass being a mixture of […]

CO₂ is obtained by heating

CO₂ is obtained by heating

Options

(a) NaHCO₃ (b) Na₂CO₃ (c) MgCO₃ (d) K₂CO₃

Correct Answer:

NaHCO₃

Explanation:

No explanation available. Be the first to write the explanation for this question by […]

Melting point is the higher for

Melting point is the higher for

Options

(a) Ga (b) B (c) In (d) Al

Correct Answer:

B

Explanation:

In the boron family the melting point decreases on moving down the group upto […]

Alum in dyeing of clothes is used as

Alum in dyeing of clothes is used as

Options

(a) bleaching agent (b) fire proof material (c) mordant of colour (d) diluent

Correct Answer:

mordant of colour

Explanation:

Alums are the double salts […]

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