Chemistry

The type of energy changes that accompany the mixing of a strong acid to a strong base is?

A. electrical B. heat C. light D. sound Correct Answer: Option B B. heat

6 years ago

Which of the following statements about volatile liquids is correct? They have

A. high vapour pressure and low boiling point B. high vapour pressure and high boling point C. low vapour pressure…

6 years ago

The vapour pressure of a given volume of liquid increase when the?

A. liquid becomes saturated with a salt B. Volume of the liquid increases C. temperature of the liquid falls D.…

6 years ago

Which of the following statements about a chemical system in equilibrium is correct? The

A. reaction is irreversible B. reaction goes to completion C. equilibrium is re-established when a stress is applied D. equilibrium…

6 years ago

The oxidation number of sulphur in Fe2(SO4)3 is?

A. +2. B. +3 C. +4. D. +6. Correct Answer: Option D D. +6. Explanation Fe2(SO4)3 = 0 (+3 x…

6 years ago

An aqueous solution of Na2CO3 is?

A. acidic B. alkaline C. amphoteric D. neutral Correct Answer: Option B B. alkaline

6 years ago

How many lone pair (s) of electrons is present in HF?

A. o B. 1 C. 2 D. 3 Correct Answer: Option D D. 3

6 years ago

NH4- is formed from NH3 and H- by?

A. covalent bonding B. dative bonding C. hydrogen bonding D. ionic bonding Correct Answer: Option B B. dative bonding

6 years ago

The relative atomic mass of chlorine is not a whole number because?

A. it is the weighted average mass of all its various isotopes B. it is the average mass of all…

6 years ago

An atom W has 17 electrons and 18 neutrons. Which of the following representations of the atom is correct?

A. 17//18W B. 18//17W C. 35//17W D. 35//18W Correct Answer: Option C C. 35//17W

6 years ago