Assertion (A): Preservative are added to food items.
Reason (R): Preservatives inhibit the growth of microorganisms.
(b) Preservatives are added to the food items because they inhibit the growth of microorganisms.
Assertion (A): Chemical messengers are chemicals that enable communi ¬cation of message between two neutrons or between neurons and muscles. Reason (R): Chemicals enter the cell through receptor.
Compounds with antiseptic properties are
(a) CHCl, (b) CHI3
(c) Boric acid (d) 0.3 ppm aqueous solution of Cl2
Sodium salts of some acids are Very useful as food preservatives. Suggest a few such acids.
How does the branching of hydrocarbon chain of synthetic detergents affect their biodegradability?
Write the chemical equation for preparing sodium soap from glyceryl oleate and glyceryl palmitate. Structures of these compounds are given below:
(i)(C15H31COO)3C3H5-Glyceryl palmitate
(ii)(C17H32COO)3C3H5-Glyceryl oleate
Which of the following compounds are administered as ant-acids?
(a) Sodium carbonate (b)Sodium Hydrogen carbonate
(c)Aluminium carbonate (d)Magnism Hydroxide
Aspirin is pain relieving antipyretic drug but can be used to prevent heart attack. Explain.
With the help of an example explain how do tranquilizers control the feeling of depression?
Assertion (A): Receptor proteins show selectivity for one chemical messenger over the other.
Reason (R): Chemical messenger binds to the receptor site and inhibits its natural function.
Low level of noradrenaline is the cause of depression. What type of drugs are needed to cure this problem? Name two drugs.
Which of the following are not used as food preservatives?
(a) Table salt (b) Sodium hydrogen carbonate
(c) Cane sugar (d) Benzoic acid
Draw the diagram showing micelle formation by the following detergent. CH3(CH2)10CH2O SO3– Na+.
Between sodium hydrogen carbonate and magnesium hydroxide which is a better antacid and why?
Assertion (A): Preservative are added to food items.
Reason (R): Preservatives inhibit the growth of microorganisms.
How do enzymes catalyse a chemical reaction in the living system? Explain drug target interaction taking the example of enzyme as target.
With refrence to which classification has the statement "ranitidine is an antacid", been given?
Following type of non-ionic detergents are present in liquid detergents, emulsifying agents and wetting agents. Label the hydrophilic and hydrophobic part in the molecule. Identify the functional group (s) present in the molecule.
Why are cimetidine and ranitidine better antacids than sodium hydrogencarbonate or magnesium or aluminium hydroxide?
Which of the following statements are incorrect about receptor proteins?
(a) Majority of receptor proteins are embedded in the cell membranes.
(b) The active site of receptor proteins opens on the inside region of the cell.
(c) Chemical messengers are received at the binding sites of receptor proteins.
(d) Shape of receptor does not change during attachment of messenger.
Which of the following are sulpha drugs?
(a) Sulphapyridine (b) Prontosil
(c) Salvarsan (d) Nardil
Which of the following are anionic detergents?
(a) Sodium salts of sulphonated long chain alcohol.
(b) Ester of stearic acid and polyethylene glycol.
(c) Quaternary ammonium salt of amine with acetate ion.
(d) Sodium salts of sulphonated long chain hydrocarbons.
