Question

(c)
If the letter 'R' was used to represent any of the elements in the
group, then the hydride and oxide of carbon would respectively be
represented as
(1) RH,, RO
(ii) RH4, RO2
(iii) RH, RO2
(iv) RH, RO​

Answer 1

Answer:

Circle the letter of each statement that is true about a catalyst. a. A catalyst is the new material produced as a result of a chemical reaction. b. A catalyst is not used up in a chemical reaction. c. A catalyst adds heat to a chemical reaction. d. A catalyst speeds up a chemical reaction.

Explanation:

Answer 2

Answer:option b

Explanation:

Valency of carbon is 4

Moreover CO2 and CH4 are most commonly found substance.