Chemistry

Carbon is tetravalent because?

A. The electrons in both the 2s and 2p orbitals are equivalent B. The electrons in all the orbitals of…

4 years ago

Sulphur (IV) oxide bleaches by?

A. Reduction B. Oxidation C. Hydration D. Adsorption Correct Answer: Option A - Reduction

4 years ago

When steam is passed over red-hot carbon; the substances produced are?

A. Hydrogen and trioxocarbonate (IV) acid B. Hydrogen, oxygen and carbon (IV) oxide C. Hydrogen and carbon (II) oxide D.…

4 years ago

Which of the following gases can be collected by the method of downward delivery?

A. Chlorine B. Oxygen C. Ammonia D. Hydrogen Correct Answer: Option A - Chlorine

4 years ago

The allotropy of carbon used in the decolourization of sugar is?

A. Graphite B. Soot C. Charcoal D. Lampblack Correct Answer: Option C - Charcoal

4 years ago

Which of the following shows little or no net reaction when the volume of the system is decreased?

A. H2(g) + I2(g) ↔ 2HI(g) B. 2NO2(g) ↔ N2O4(g) C. PCl5(g) ↔ PCl3(g) + Cl2(g) D. 2O3(g) ↔ 3O2(g)…

4 years ago

N2O4(g) ↔ 2NO2(g). More product formation will be favoured by?

A. a constant volume B. an increase in pressure C. a decrease in pressure D. a decrease in volume Correct…

4 years ago

Which of the following hydrogen halides the highest entropy value?

A. HF B. HCl C. HBr D. HI Correct Answer: Option A - HF

4 years ago

The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830s is? [Ag = 108, F = 96500 c mol-1]

A. 108.0g B. 54.0g C. 27.0g D. 13.5g Correct Answer: Option B - 54.0g Explanation Ag + e → Ag+…

4 years ago

Which of the following acts as both reducing and oxidized agent?

A. H2 B. SO2 C. H2S D. CO2 Correct Answer: Option B - SO2

4 years ago