Choose the class of inorganic compounds described by the General formula C n H 2 n:
A. alkanes
B. alkenes
C. alkynes
D. alkanols
2. Mark the correct statement about the value of proteins:
A. proteins are needed by plants as raw materials for the production of amino acids
B. living organisms use proteins as a source of energy
C. proteins are the main building material for animal cells
D. proteins are used to remove excess glucose from the body
3. Polyvinyl chloride monomer has the formula - CH 2 = CHCl. Choose the formula of the polymer:
A. (- CHCl - CHCl -) n
B. (- CH 2 - CHCl -) n
C. (- CHCl = CCl 2 -) n
4. Specify the name of the synthetic polymer:
A. nucleic acid
B. calcium carbonate
C. kapron
D. formic acid
5. Choose the correct statements:
A. cracking is used to obtain lubricants
B. kerosene - automotive fuel
C. solid residue after distillation of oil is used as asphalt
D. during cracking there is a splitting of molecules of heavy hydrocarbons
6. Indicate the sign of a qualitative reaction to polyhydric alcohols:
A. formation of a white amorphous precipitate
B. release of brown gas
C. discoloration of the solution
D. dissolution of the blue precipitate
