1) the true statement ( تصريح او تعبير ) is: a) 1. Polar compounds contain covalent bonds b) 2. Polar compounds have elements containing partial charges c) 3. There is a difference between covalent bonds and polar covalent bonds d) 4. All are wright 2) Pure polar covalent bonds is: a) 1. Have partial charge b) 2. Have positive and negative charge c) 3. Is different from non-polar covalent bonds d) 4. Connect between two elements have the same electronegativity 3) Water is called polar compound because: a) 1. It consists of one oxygen atom and two hydrogen atom b) 2. The electronegativity is similar between oxygen and hydrogen c) 3. The polarity is high d) 4. The covalent bonds between oxygen and hydrogen atoms 4) Most of the fossil fuel are : a) 1. Hydrocarbons like oil b) 2. Non-polar compounds c) 3. Can not dissolve in water d) 4. The electronegativity between carbon and hydrogen e) 5. All the above

about polarity

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