796: Salinization occurs when the irrigation water accumulated in the soil evapo- rates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?
(a) It greatly increases the crop production.
(b) It makes some soils impermeable.
(c) It raises the water table.
(d) It fills the air spaces in the soil with water.
797: On which date Constitution of India was adopted and enacted by the Constituent Assembly?
(a) 15th August, 1947
(b) 26th January, 1950
(c) 26th November, 1949
(d) 30th January, 1948
798: Match List I (Ethnic Community) with List II (Country ) and select the correct answer using the codes given below the lists:
List I -- List II
(Ethnic community) -- (Country)
A. Apatani -- 1. China
B. Dayak -- 2. India
C. Dinka -- 3. Indonesia
D. Uighur -- 4. Sudan
Codes:
A B C D
(a) 2 3 4 1
(b) 3 2 4 1
(c) 2 3 1 4
(d) 3 2 1 4
799: Match List I with List II and select the correct answer by using codes given below the lists :
List I List II
I. Vitamin : (A) Pepsin
II. Enzyme : (B) Carotene
III. Hormone : (C) Keratin
IV. Protein : (D) Progesterone
Codes:
(a) I - A, II - B, III - C, IV - D
(b) I - B, II - A, III - D, IV - C
(c) I - B, II - A, III - C, IV - D
(d) I - A, II - B, III - D, IV - C
800: Which of the following terms is used to denote the heavy rocks of the lithosphere ?
(a) Substratum
(b) SIAL
(c) SIMA
(d) None of the above