I. Every living organism needs some non-biological substances for it's existence. II. All nonbiological substances are found as minerals in the earth. -
... [Show More] CORRECT ANSWER I is correct and
II is incorrect
Science deals mainly with: - CORRECT ANSWER physics and chemistry
The study of the structure of the body is called: - CORRECT ANSWER anatomy
The study of the functions of living organisms is: - CORRECT ANSWER physiology
I Anatomy is a very important science in the field of biology. II Anatomy is the science which
deals with the functions of the human body. - CORRECT ANSWER I is correct and II is
incorrect
I Physiology is a very important science in the field of biology. II Physiology is the science
which deals with the functions of the body. - CORRECT ANSWER I and II are both correct
Which one of the following belongs to the science of chemistry? - CORRECT ANSWER The
alteration of the structure of molecules
I Chemical reactions only take place outside and not inside a living organism. II The structure of
molecules change during chemical reactions. - CORRECT ANSWER I is incorrect and II is
correct
The field of physics includes: - CORRECT ANSWER heat and electricity
Which one of the following belongs to the field of physics? - CORRECT ANSWER Sound,
electricity and heat
The field of physics includes: - CORRECT ANSWER the science of electricity
An anion is: - CORRECT ANSWER A negatively charged atom
An anion is: - CORRECT ANSWER a negatively charged chloride atom (CI-)
A cation is: - CORRECT ANSWER A positively charged sodium atom (Na+)
An electrolyte is: - CORRECT ANSWER A substance which, dissolved in water, splits into ions
Examples of electrolytes are: - CORRECT ANSWER acids and salts
An example of an electrolyte is: - CORRECT ANSWER salt-solution
An acid is an electrolyte because: - CORRECT ANSWER it can conduct an electric current
An example of an inorganic acid is: - CORRECT ANSWER sulphuric acid
An alkali must contain: - CORRECT ANSWER metal atoms and hydroxyl group(s) (OH)
An example of an alkaline substance is: - CORRECT ANSWER soap
If a metal-oxide is dissolved in water it forms: - CORRECT ANSWER an alkali
The pH scale is used to measure the degree of acidity or: - CORRECT ANSWER alkalinity
pH can be decreased by: - CORRECT ANSWER increasing hydrogen-ions
The letter p in pH means: - CORRECT ANSWER potential
pH is: - CORRECT ANSWER the number of free H-ions in solution
If the pH of a solution is between 5 and 7, the solution is a: - CORRECT ANSWER weak acid
If the pH of a solution is between 1 and 3 the solution is a: - CORRECT ANSWER strong acid
If the pH of a solution is between 7 and 9 the solution is a: - CORRECT ANSWER weak alkali
If the pH of a solution is between 12 and 14 the solution is: - CORRECT ANSWER strong alkali
The pH of distilled water is: - CORRECT ANSWER 7 [Show Less]