Q1. Which of the following is a natural dye?
(a) Crystal violet
(b) Aniline blue
(c) Alizarin
(d) Phenolphthalein
Q2. The ratio of pure gold in 18 carat gold is:
(a) 60%
(b) 75%
(c) 80%
(d) 90%
Q3. Diamond is harder than graphite because of:
(a) difference in layers of atoms
(b) tetrahedral structure of diamond
(c) difference of crystalline structures
(d) None of these
Q4. Gobar gas contains mainly:
(a) methane
(b) ethylene
(c) propylene
(d) acetylene
Q5. Which of the following elements is non-radioactive?
(a) Uranium
(b) Thorium
(c) Plutonium
(d) Zirconium
Q6. The gas used for artificial fruit ripening of green fruit is
(a) Ethylene
(b) Acetylene
(c) Ethane
(d) Methane
Q7. What is the element required for solar energy conversion?
(a) Beryllium
(b) Tantalum
(c) Silicon
(d) Ultra pure carbon
Q8. Which of the following type of coal has the lowest proportion of volatile matter?
(a) Lignite
(b) Peat
(c) Bituminous
(d) Anthracite
Q9. What is the chemical name for ‘Baking Soda’?
(a) Sodium carbonate
(b) Sodium bicarbonate
(c) Sodium nitrite
(d) Sodium nitrate
Q10. Saccharin is made up of
(a) Toluene
(b) Phenol
(c) Propane
(d) Butane
Solutions
S1. Ans.(c)
S2. Ans.(b)
S3. Ans.(a)
S4. Ans.(a)
S5. Ans.(d)
S6. Ans.(a)
S7. Ans.(c)
S8. Ans.(d)
S9. Ans.(b)
S10. Ans.(a)
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