The properties of acids are: (A), (C) and (D).
Explanation:
Acids taste sour, and most
acids are poisonous. Furthermore, acids react with certain metals to
produce hydrogen gas. Few acids are corrosive as well. The option (B) is not valid because acids react with BASES (not with other acids) to produce salt and water. Hence A, C and D are the correct options.
The simplest pure substances that cannot be broken down into any other substances are elements, such as gold (Au) or oxygen (O).
the answer is 1 because a single pulley has 1 rope
The intensity of an electromagnetic wave increases with the field strength.
Answer:
Explanation:
height of Ellipse 
i.e. 
Width of Ellipse 
i.e. 
Equation of a vertical Ellipse is
at 
