(i)      Which statement gives a clear meaning of Chemistry?

1. The study of matter in relation of energy
2. The study of nature and properties of matter
3.  The study of matter and arrangement of particles 
4. The study of matter and chemical reaction

(ii)   The mass number of an atom is determined by:

1.  protons and neutrons 
2.  protons and electrons 
3.  neutrons and electrons 
4. protons alone

(iii)Which of the following is a metal?

1. Water 
2. Chlorine
3. Sodium  
4.  Nitrogen

(iv)Air entering the Bunsen burner barrel can be controlled by

1.  metal ring 
2.  air hole
3.  metal jet 
4. air ring

(v)    How many atoms are there in a water molecule

1. Two     
2. . Three 
3.  Four      
4. Five

(vi)Which neutral atom has the same number of eletrons as Mg²+?

1. Magnesium 
2.  Sodium 
3.  Neon 
4.  Argon

(vii)         The appropriate extinguisher used to put off fire caused by cooking oil is:

(vii)         The appropriate extinguisher used to put off fire caused by cooking oil is:

1. Water extinguisher
2. Carbon extinguisher
3.  Wet chemical extinguisher
4. Dry air extinguisher

(viii)      A non-luminous flame is obtained if the hole is:

1. fully opened 
2. partially opened 
3.  closed 
4.  half opened

(ix)Which is the least abundant gas in the air?

1. Nitrogen     
2.  Oxygen
3.  Neon     
4.  Carbon dioxide

(x)    The process which produces energy in form of heat and light is called:

1. decomposition 
2. combustion
3.  distillation 
4.  sublimation