1. Which variety of glass is heat resistant?
A. Hard glass
B. Flint glass
C. Pyrex glass
D. Bottle glass
2. In vulcanisation, natural rubber is heated with
A. carbon
B. Silicon
C. Sulphur
D. Phosphorus
3. Which one of the following is correct? Butter is
A. a supercooled oil
B. an emulsion
C. a molecular solid
D. none of these
4. Which one of the following has the highest density?
A. Chloroform
B. Water
C. Benzene
D. Ice
5. Which one of the following is the softest?
A. Iron
B. Aluminium
C. Calcium
D. Lithium
6. Which of the following materials is suitable for water purification?
A. Silicones
B. Zeolites
C. Asbestos
D. Quartz
7 Which one of the following is an element which never exhibits positive oxidation state in any of its compounds?
A. Oxygen
B. Chlorine
C. Fluorine
D. Carbon
8. Rubies and Sapphires are known chemically as
A Silicon dioxide
B. Aluminium oxide
C. Lead tetraoxide
D. Boron nitride
9. Which one of the following when dissolved in H2O gives hissing sound?
A. Limestone
B. Slaked lime
C. Soda lime
D. Quick lime
10. Mixture of which one of the following pairs of gases is the cause explosion in mines?
A. Hydrogen and oxygen
B. Oxygen and acetylene
C. Methane and air
D. Carbon dioxide and methane
11. Etherification of propane 1,2,3, triol and unsaturated higher carboxylic acid will produce___
A. Fats
B. Soap
C. Methyl-propanoate
D. Alkanols
12. In solution, aminoethanol acid (glacier) can be represented as NH3 + CH2COO-. This implies that it_____
A. Is soluble in all organic liquids
B. Can function as a week acid or weak base
C. Does not form salts with mineral acids
D. Is highly acidic
13. The formula (CH3)3CH is that of
A. Polyhydric alkanol
B. Secondary alkanol
C. Tertiary alkanol
D. Primary alkanol
14. What is the relationship between the compounds represented by the following structure
A. allotropes
B. dimmers
C. polymers
D. geometric isomers
15. The composition of gunpowder is
A. 50% KNO3, 35% charcoal and 15% sulphur
B. 70% KNO3, 15% charcoal and 15% sulphur
C. 75% KNO3, 15% charcoal and 10% sulphur
D. 65% KNO3, 25% charcoal and 10% sulphur
16. Carbon is often deposited in the exhaust pipe of cars because of the
A. presence of carbon in petrol
B. dehydrogenation of petrol
C. incomplete combustion of the petrol
D. presence of additives in petrol
17. The product of the reaction between ethanol and excess acidified K2Cr0-
A. Ethanol
B. Ethyl ethanoate
C. Ethanoic acid
D. Ethyne
18. Which of the following alkanols on oxidation, is most likely to yield the compound is.
A. Butanol
B. Propan-2-ol
C. 2-methylbutatan-1-ol
D. 2-methyl propan-1-ol
19. In which of the following processes are larger molecules broken into smaller structures?
A. Vulcanization of rubber
B. Hydrogenation of Palm oil
C. Hydrolysis of starch
D. Polymerization
20. What is the IUPAC name of the compound with this structure?
A. 3-methylbutane
B. 3-methylpentane
C. 2-methylbutane
D. 2-methylpropane
Check your NDA chemistry past question 21 – 40 here
