791: Which one of the following was the name of salt tax in ancient India under the administration of Cholas?
(a) Bhaga
(b) Uppayam
(c) Valiayam
(d) Hiranya
792: Which of the following republics, besides Russia, are nuclear powers?
1. Ukraine
2. Georgia
3. Belarus
4. Kazakhstan
(a) 1, 2 and 4
(b) 2, 3 and 4
(c) 1, 2 and 3
(d) 1, 3 and 4
793: Which one of the following statements is correct?
(a) Liquid Sodium is employed as a coolant in nuclear reactors
(b) Calcium carbonate is an ingredient of toothpaste
(c) Bordeaux mixture consists of sodium sulphate and lime
(d) Zinc amalgams are used as a dental filling
794: Those who have binoculars can be members of 'Bird-watcher Club'. Some members of the club have cameras. Those who have cameras can take part in the photo exhibition. Which of the following conclusions can be drawn from the above statements?
(a) Only those who have cameras, are members of the club
(b) Only those who have binoculars can take part in the photo exhibition
(c) Those who participate in photo exhibition have binoculars
(d) Only some of the members of the club can take part in photo exhibition
795: Assertion (A) :
Mangroves are very specialised forest ecosystems of tropical and subtropical regions bordering certain sea coasts.
Reason (R) :
They stabilise the shoreline and act as bulwark against encroachments by sea.
In the context of the above two statements, which one of the following is correct ?
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true