1. Thorium is far more abudant in nature than uranium
2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
3. Thorium produces less harmful waste compared to uranium.
Which of the statement (s) given above is/are correct?"
(a) Only 1
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
182 Q) "Consider the following gases
I. Water vapour
II. Nitrous oxide
Which of the gases given above are “Green House Gases (GHGs)”? "
(a) All of these
(b) I, II and III
(c) II and III
(d) II and IV
(a)A lead compound
(b)A mercury compound
(c)A sulphur compound
(d)A fluorine compound
184 Q) Statement I Chlorine radicals C1 ‘initiate the chain reaction for ozone depletion. Statement II Gaseous hypochlorous acid and chlorine are photolysed by sunlight.
a. Both the statements are true and Statement II is the correct explanation of Statement I.
b. Both the statements are true, but Statement II is not the correct explanation of Statement I.
c. Statement I is true, but Statement II is false.
d. Statement I is false, but Statement II is true.
185 Q) Match the Following
1. Anti-cancer agent
2. Complex of cobalt
3. Complex of magnesium
4. Complex of iron
(b) 2 1 4 3
(c) 4 3 2 1
(d) 4 1 2 3
186 Q) Which one among the following polymers is used for making bullet-proof material?
(a) Polyvinyl chloride
187 Q) "Which one of the following fatty acids consists only the essential fatty acids? "
(a) Stearic acid, linolenic acid, arachidonic acid
(b) Linoleic acid, oleic acid, linolenic acid
(c) Linoleic acid, linolenic acid, arachidonic acid
(d) Linoleic acid, linolenic acid, stearic acid
188 Q) Which one among the following statement about an atom is not correct?
(a) Atoms always combine to form molecule
(b) Atoms are the basic units from which molecules and ions are formed
(c) Atoms are always neutral in nature
(d) Atoms aggregate in large numbers to from the matter that we can see, feel and touch
189 Q) Sodium stearate is a salt and is used
(a) in gun powder
(b) in paint
(c) to make soap
(d) to make fertilizer
190 Q) "Freon' used as refrigerants is chemically known as "
(a)fluorinated aromatic compound