Question

help!!
Multiple Choice: (2 pts each/16 pts)
1. The catalyst used in cross-coupling reactions (Suzuki and Heck) features which metal?
a. Copper
b. Ruthenium
c. Palladium
d. Potassium
2. Which of the following statements is true regarding the structure of a carbene?
a. It is an anion
b. It is a cation
c. It is tetrahedral
d. It has both a lone pair and a vacant orbital
3. What is the purpose of the amine base used in a Heck coupling?
a. It removes a hydrogen from the alkene
b. It serves to neutralize (react with) the HX that is formed
c. It removes a hydrogen from the palladium
d. It remove
4. Which ​

Answer 1

Answer:

ok

Explanation:

Choose the correct option and write it in your answer book -

(0) If a triangle has sides as a, b and c then by using Heron's

formula the area of triangle is Vs (s-a)(s- b)(s -c),

where s =

at btc

(a)

3

a + b + c

(b)

2

ax bx с

(c)

2

(at b) x c

(d)

3

(ii) Surface area of cube is-

(а) ба

(b) a 3

(c) 6a²

(d) axbxc

(iii) Curved surface area of hemisphere is -

(a) zar

(b) 270

(iv)

(c) 21

(d) 2ter2

Sum of all the observations is -

total number of observations

(a) Mean

(b) Median

(c) Mid value

(d) Mode

(v) The most frequently occurring observation is -

(a) Mean

(b) Mode

(c) Median

(d) Mid value

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951 [M-2704-A]

Answer 2

Answer:

1) (c) Palladium

2) (d) It has both a lone pair and a vacant electron

Explanation:

I don't know answer for the remaining questions.