Q1. What is the chemical name of vinegar?
(a) Citric acid
(b) Acetic acid
(c) Pyruvic acid
(d) Malic acid
Q2. Glass is a –
(a) pure solid
(b) supercooled liquid
Q3. Which of the toxic heavy metals is found in modern tannery industries?
Q4. Which of the following is used in welding broken pieces of iron rails and machine parts?
(a) Aluminum sulphate
(c) Aluminum powder
(d) None of the above
Q5. Which of the following produces highest amount of energy upon oxidation?
(d) An alkane
Q6. The Ringworm is a …..disease.
Q7. Dolly ,the World’s First cloned animal was a
Q8. Non-stick kitchenwares are coated with
Q9. Acid secretion is characteristic of
(a) Buccal cavity
(c) Small intestine
(d) Large intestine
Q10. Which one of the following is used as a sowing agent in the preparation of soft drinks?
(a) Phosphoric acid
(b) Phosphorus acid
(c) Salicylic acid
(d) Boric acid
Q11. Which type of radiations are absorbed by the upper layer of the atmosphere?
Q12. Which one of the following minerals is found in pure form?
Q13. Commercial Vaseline is derived from
(a) plant gums
(b) coal tar
(c) wool wax
Q14. Which of the following is used to denature ethanol?
(a) Methyl alcohol
(b) Propyl alcohol
Q15. The charcoal used to decolourise brown sugar solution is
(a) Wood charcoal
(b) Coconut charcoal
(c) Animal charcoal
(d) Sugar charcoal