Physical Chemistry Answers

, The least common multiple LCM of the factors of the quadratic factor of the expression y=x³ + 6x² – x – 3 , is ? 

tan (22.5) can be expressed as

A.     (1+2^0.5)1/2

B.     (-1+2^0.5)

C.     (2+2^0.5)1/2

D.     None

, Consider the differential equation d²y /dx² + 16y = cos4x, the complimentary function of the differential equation is?

2”, From the question above, find the particular integral of the differential equation.

3, Given the system :

x+y+z =2

2x-y-2z=-1,

x-2y-z=0 

(x y z) = ?

, Esterification of an equimolar solution of any alcohol and ethanoic acid leads to the equilibrium

A.     70% ester

B.     67% ester

C.     60% ester

33% ester

Nylon is an example of ? A. Polyester  B. Polythene C. Plyamide D. Polysaccharide

Which of the following statements about primary amines is “False”?

A. Alkyl amines are stronger bases than aryl amines

B. Alkyl amines react with nitrous acid to produce alcohols 

C. Aryl amines react with nitrous acid to produce phenols

D. Alkyl amines are stronger bases than ammonia 

Cameroonian’s ambassador to Italy is?. The American Ambassador to Cameroon is?

What is the nationality of the UN secretary general

Assuming closest packed arrangement of iron

atoms, what will be the ratio of density of Austenite to that of alpha iron?