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What is the type of chemical bond between the water molecules:

• covalent and ionic

• metallic

• hydrogen

• ionic

• non-covalent

Hydrogen compounds of which from the elements can form the hydrogen bonds?

• I

• Si

• F

• P

• C

Which of the variant from the list has only ionic bond?

 

• CH3COOH

• Na2S

• PH3

• HCI

• NH4CI

What hybrid orbitals are formed when ones orbital and three p orbitals all hybridize?

 

• Four sp3 orbitals

• Three sp3 orbitals

• Two sp2 orbitals

• One sp3 orbital

• Four sp2 orbitals

High-molecular organic compounds consisting of amino acid residues connected in a long chain by a peptide bond are:

 

• carbohydrates

• lipids

• nucleic acid

• proteins

: Ethyne (acetylene) contains a single carbon-carbon sigma bond that is formed through the overlap of:

 

• 3 sp hybridized orbital electrons

• 2 sp hybridized orbital electrons

• 2 sp2 hybridized orbital electrons

• 1 sp2 hybridized orbital electrons

• 1 sp hybridized orbital electrons

: Specify the functional group of ketones:

 

• SH-

• carbonyl

• carboxyl

• hydroxyl

• -NH2

An extensive group of natural organic compounds, including fats and fat-like substances are:

 

• carbohydrates

• proteins

• nucleic acid

• lipids

• biogens

A sigma bond is created when specific combinations of atomic orbitals overlap. Which of the following occurrences does not result in the formation of a a bond?

 

• An s orbital overlapping with another s orbital

• A hybrid sp orbital overlapping with another hybrid sp orbital

• A p orbital overlapping with another p orbital end to end

• Ans orbital overlapping with a p orbital

• A p orbital overlapping with another p orbital side by side

Specify the functional group of acids:

 

• -NH2

• carbonyl

• carboxyl

• hydroxyl

• -CH-