Which one of the following is not a nucleon?
(A) Protron
(B) Neutron
(C) Electron
(D) Positron
Which particles are left behind when a hydrogen atom loses its electron?
(A) An alpha particle
(B) A neutron
(C) A proton
(D) A beta particle
What is the standard 18 carat gold sold in the market?
(A) 82 parts gold and 18 parts other metals
(B) 18 parts gold and 82 parts other metals
(C) 18 parts gold and 6 parts other metals
(D) 9 parts gold and 15 parts other metals
Which of the following elements is NOT a component of baking soda?
(A) Hydrogen
(B) Calcium
(C) Sodium
(D) Oxygen
1. Which of the following calcium elements is not a component of baking soda?
2. The chemical formula of baking soda is NaHCO3, which is composed of four elements sodium, hydrogen, carbon and oxygen.
3. Baking soda is an alkaline substance used as a leavening agent in baking.
What do you call the type of drugs that mimic the natural messenger by switching on the receptor?
(A) Antidepressants
(B) Depressants
(C) Agonist
(D) Antagonists
Which of the following statements Is that not correct?
(A) Digestion is a chemical change.
(B) Photosynthesis is a chemical change.
(C) Respiration is a chemical change.
(D) Crystallisation is a chemical change.
Name an alkylbenzene widely used as a chemical intermediate in the production of phenol.
(A) Cumene
(B) Furan
(C) Styrene
(D) Toluene
Burning of coal is a ______ reaction.
(A) displacement
(B) decomposition
(C) combination
(D) double displacement
1. The burning of coal is an example of a combination reaction (a combination).
2. When two or more elements combine to form a compound, it is called a combination reaction.
Which one of the following elements has atomicity equal to one?
(A) Oxygen
(B) Argon
(C) Nitrogen
(D) Fluorine
Argon elements have atomicity equal to one.
Argon is a chemical element with the symbol Ar and atomic number 18.
It is in group 18 of the periodic table and is a noble gas.
What do you call the drugs that bind to the receptor site and inhibit its natural function?
(A) Antidepressants
(B) Agonist
(C) Antagonists
(D) Depressants
1. Name: Antagonist
2. Mechanism of action: By binding to the surface of the receptor, they cause opposition to the natural function.
Get the Examsbook Prep App Today