626: Assertion (A) :
To dilute sulphuric acid, acid is added to water and not water to acid.
Reason (R) :
Specific heat of water is quite large.
(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
627: Avinash is Ravi's eldest brother. Ravi is younger to Ajay. Ravi and Ajay are not brothers. Which of the following statements is definitely true?
(a) Ajay is younger to Avinash
(b) Avinash is younger to Ajay
(c) Ajay is younger to Ravi
(d) None of the above
628: The chief ingredient of the mosquito repellent cream is derived from:
(a) Tulsi
(b) Neem
(c) Lemon
(d) Rice bran
629: Which one of the following statements is correct?
(a) The Constituent Assembly of India was elected by the Provincial Assemblies in the year 1946.
(b) Jawaharlal Nehru, M.A. Jinnah and Sardar Vallabhbhai Patel were members of the Constituent Assembly of India.
(c) The First Session of the Constituent Assembly of India was held in January, 1947.
(d) The Constitution of India was adopted on 26th January, 1950.
630: A tree species in Mauritius failed to reproduce because of the extinction of a fruit-eating bird. Which one of the following was that bird ?
(a) Dove
(b) Dodo
(c) Condor
(d) Skua