Chemistry

The s-block element used as a catalyst in the manufacture of Buna-S rubber is

Options

(a) Mg (b) Ca (c) Ba (d) Na

Correct Answer:

Na

Explanation:

No explanation available. Be the first […]

For alkali metals, which one of the following trends is incorrect

Options

(a) Hydration energy: Li > Na > K > Rb (b) Ionization energy: Li > Na > K > Rb (c) […]

The characteristic not related to alkali metals is

Options

(a) their ions are isoelectronic with noble gas (b) low melting point (c) low electronegativity (d) higher ionisation energy

Correct Answer:

higher ionisation energy

[…]

In a lime kiln, to get higher yield of CO₂, the measure that can be taken is

Options

(a) to remove CaO (b) to add more CaCo₃ (c) to maintain higher temperature (d) […]

Excess of Na⁺ ions in air system causes

Options

(a) diabetes (b) anaemia (c) high blood pressure (d) low blood pressure

Correct Answer:

high blood pressure

Explanation:

No explanation available. Be the first […]

Solution of sodium metals in liquid ammonia strongly reduces due to the presence in which of the following solution

Options

(a) Sodium hydride (b) Sodium amide (c) Solvated electrons (d) Sodium atoms

Correct […]

When sodium bicarbonate is heated strongly for calcined in a Kiln, it forms

Options

(a) NaCO₃ (b) Na (c) NaHCO₃ (d) Na₂CO₃

Correct Answer:

Na₂CO₃

Explanation:

No explanation available. Be the first to […]

When carbon monoxide is passed over solid caustic soda heated to 200⁰ C it forms

Options

(a) HCOONa (b) Na₂CO₃ (c) CH₃COONa (d) NaHCO₃

Correct Answer:

HCOONa

Explanation:

No explanation available. Be the […]

During the electrolysis of fused sodium chloride the anodic reaction is

Options

(a) oxidation of chloride ions (b) oxidation of sodium ions (c) reduction of chloride ions (d) reduction of sodium ions

Correct […]