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Question 1

CATAYLST

Answer 1

this is a substance which alters the speed of a reactionn by providing an alternative route of lower EA. It remains chemically unchanged and unchanged in mass at the end of the reaction

Question 2

haber process production NH3

Answer 2

finely divided FE catalyst

Question 3

hydrogenation of alkenes

Answer 3

finely divided Ni catalyst

Question 4

contact process- manufacturing H2SO4

Answer 4

V205 (vanadium 5 oxide)

Question 5

oxidation of NH3

Answer 5

Pt and Rd gauze

Question 6

Explaining catalyst thingy

Answer 6

the gases form WEAK BONDS with the metal atom- this is called ADSORPTION. This holds the gases in just the right position to react. Collision FREQ and GEOMETRY increases. The bonds in the reactant molecules are WEAKENED. (Ea is lowered)
Products break away- DESORPTION. This frees up room on the surface of the catalyst for more gases to take place and react

Question 7

cisplatin

Answer 7

anticancer drug. Cisplatin forms coordinate bonds to a basic site in the DNA of cancer cells. This process prevents cancerous DNA from replicating, effectively killing the cancerous cells. Toxic.

Question 8

edta

Answer 8

used in blood transfusion and surgery to remove CA IONS which cause blood clotting. Edta for complex with ca required for clotting action.
Sequesting agent.

Question 9

Cr +3

Answer 9

amphoteric, react with a base

Question 10

D block

Answer 10

This is an element which has an atom with its highest energy electron in s sun shell

Question 11

Transition element

Answer 11

Forms atleast one stable ion with a partially filled d sub shell

Question 12

Ox states above +3

Answer 12

Electrons may be regarded as partially lost to a more electronegative atom in a covalent bond

Question 13

Complex ion

Answer 13

Formed by the co ordination of lone pair of electrons from a donor (called a ligand ) to an atom or ion (acceptor) which has empty orbitals to accommodate

Question 14

Ligand

Answer 14

Ion or molecule that is capable of donating one or more line pair of electrons via a co ordinate bond to a central metal atom or ion in a complex

Question 15

Bidentate

Answer 15

A bidentate ligand USES two lone pair of electrons to form two coordinate bonds with central metal atom or ion in a complex

Ethanedioate ion
1,2-diaminoethane

Question 16

Explain colour

Answer 16

No d electrons or full d orbits it will be colourless as bond-d transitions

Question 17

Ligand strength alkyl

Answer 17

Alkyl groups are electron donating so ally groups in amines push electrons towards N atom and will destabilise the lone pair of electrons making it more likely to be donated to central metal atom or ion