section d- chemistry

Question 1

the reaction between NaOH and HCl is called neutralisation

Answer 1

true

Question 2

isotope atoms having different atomic number but the same mass number

Answer 2

false

Question 3

in a covalent bond, atoms donate the outermost electrons to achieve stability

Answer 3

true

Question 4

a catalyst alters the rate of chemical reactions

Answer 4

true

Question 5

atoms consist of a positively charged nucleus and a negatively charged electron shell

Answer 5

true

Question 6

in the reaction,
CO2 + H2O ->…..
the product is carbonic acid

Answer 6

true

Question 7

hydrogen is an example of a metal

Answer 7

false

Question 8

the electronic configuration for the six electrons in carbon is 1s2 2s2 2p2

Answer 8

true

Question 9

the rate constant links the rate of the reaction with the concentrations of the reactants

Answer 9

true

Question 10

H3O+/ OH- is an example of an acid- base conjugate pair

Answer 10

false

Question 11

organic chemistry can be defined as the chemistry of carbon containing compounds

Answer 11

true

Question 12

benzene is an alkene with two or more consecutive double bonds

Answer 12

false

Question 13

enantiomers are non- superimposable mirror images

Answer 13

true

Question 14

carbon- carbon bonds are usually strong and covalent

Answer 14

true

Question 15

C4H8 is the formula for a saturated hydrocarbon

Answer 15

false

Question 16

alkynes must have at least two carbon atoms

Answer 16

true

Question 17

oxidation with Fehling’s solution is a qualitative reaction for phenols

Answer 17

false

Question 18

the addition of bromine to alkenes results in the formation of alkanes because bromine atoms substitute hydrogen atoms

Answer 18

false

Question 19

one of the halogenation reactions occurs when a halogen, a member of group VIIA, reacts with alkenes

Answer 19

true

Question 20

Markovnikov’s rule states that with the addition of HX ( halogen halides) to an alkene double bond, the hydrogen goes to the end of the double bond that already had more hydrogen atoms.

Answer 20

true