Chemistry

Which of the following decreases when a given mass of gas is compressed to half its initial volume?

A. Average intermolecular distance B. Frequency of collisions C. Number of molecules present D. Atomic radius of each particle Correct…

6 years ago

If a metal R forms a compound with the formula R(NO3)2, the formula of its tetraoxosulphate (IV) is?

A. R(SO4)2 B. RSO4 C. R2SO4 D. R2(SO4)3 Correct Answer: Option B B. RSO4

6 years ago

The conclusion from Rutherford’s alpha-scattering experiment is that?

A. atoms are mostly empty space with a small nucleus B. emissions from radioactive substances consist of three main components…

6 years ago

If the relative molecular mass of an element is not a whole number, it can be deduced that the element is?

A. naturally radioactive B. abundant in nature C. a transition metal D. an isotopic mixture Correct Answer: Option D D.…

6 years ago

A hydrogen atom which has lost an electron contains?

A. one proton only B. one neutron only C. one proton and one neutron D. one proton, one electronic and…

6 years ago

Which of the following elements has a ground state electronic configuration with an incomplete penultimate shell?

A. Iron B. Sodium C. Aluminium D. Calcium Correct Answer: Option A A. Iron

6 years ago

Which of the following statements about soapless detergents is correct? They

A. lather readily with hard water B. increase the surface tension of water C. cause hydrolysis of salts in water…

6 years ago

The atomic number of chlorine is 17. What is the number of electrons in a chloride ion?

A. 16 B. 17 C. 18 D. 19 Correct Answer: Option C C. 18

6 years ago

The following compounds are hydrocarbons except?

The following compounds are hydrocarbons except? A. methylpropanoate B. 2-methylbutane C. benzene D. cyclohexane Correct Answer: Option A A. methylpropanoate

6 years ago