Chemistry

A salt which loses its mass when exposed to air is?

A. deliquescent B. effervescent C. Efflorescent D. fluorescent E. hygroscopic Correct Answer: Option C - Efflorescent

4 years ago

Atomic size decreases?

A. across a period from left to right B. across a period from right to left C. diagonally down the…

4 years ago

Sulphur has an oxidation number of +4 in?

A. H2S B. H2SO4 C. MgSO4 D. Na2SO3 E. S03 Correct Answer: Option D - Na2SO3

4 years ago

If the volume of a gas at 35°C is 60cm³, what would be its volume in cm³ at 273k?

A. 39.03 B. 46.81 C. 53.18 D. 67.69 E. 76.92 Correct Answer: Option C - 53.18

4 years ago

What is the molar mass of the compound below?

A. 45 B. 61 C. 122 D. 123 E. 244 Correct Answer: Option C - 122

4 years ago

In the electrolysis of dilute tetraoxosulphate (VI) acid using platinum electrodes, the products obtained at the anode are cathode respectively are

A. hydrogen, oxygen B. Hydrogen, tetraoxosulphate (VI) ion C. oxygen, hydrogen D. sulphur, hydrogen E. sulphur, oxygen Correct Answer: Option…

4 years ago

A neon atom is chemically nonreactive because?

A. the electrons at the outermost shell is partially filled B. the number of protons equals the number of electrons…

4 years ago

Which of these compounds has the greatest ionic character?

A. AlF3 B. BF2 C. CF4 D. CsF E. NaF Correct Answer: Option E - NaF

4 years ago

Which of the following compounds will undergo thermal dissociation readily?

A. AgCl B. CaCO3 C. K2SO4 D. NaOH E. NH4CI Correct Answer: Option E - NH4CI

4 years ago

The rate of a reaction usually increases with increase in the concentration of reactants because the?

A. distance between particles of the reactants increases B. frequency of collision of particles is lower C. particles of the…

4 years ago