No. of Page : 23 B20–GS (EN/AS/BN/BD/HN)
Subject Code: C3
2020
GENERAL SCIENCE
Full Marks:90
Pass Marks,27
Time: 3 hours
Candidates shall note that each question will he multilingual, viz, in English/Assamese/Bengali/Bodo /Hindi Medium, for their ready reference. In case of any discrepancy or confusion in the medium/version, the English version will be considered as the authentic version
The figures in the margin indicate full marks for the questions
SECTION – A
1. For each question given below, four answers are given. Out of four, only one answer is correct. Select the corect answer :
(a) 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution(the same solution as before) required to neutralise it will be :
(i)4mL (ii)8mL (iii)16mL (iv)12mL
(b) Which of the following methods is, suitable for preventing an iron frying pan from rusting ?
(i) Applying Grease
(ii) Applying Paint
(iii) Applying a coating of zinc
(iv) All of the above
(c) An atom has electronic cofiguration 2, 8,7. To which of the following elements
would it be chemically similar ?
(Atomic numbers are given in parentheses)
(i) N(7) (ii) F(9) (iii) P(15) (iv) Ar(18)
(d) Anaerobic respiration takes place in :
(i) Mitochondria
(ii) Chloroplasts
(iii) Nucleous
(iv)Cytoplasm
(e) Which of the following disease is caused due to the insufficient secretion of thyroxin hormone
(i)Beriberi
(ii) Goiter
(iii) Diabetes
(iv) Dwarfism
(f) If a cross is made between the plants having TT (tall) and tt (dwarf) genetic composition, which type of plants we will obtain in the next generation ?
(i) Tall (TT) and dwarf (tt) both
(ii) Only tall
(iii) Only dwarf
(iv) None of the above
(g) Which of the following lenses would you prefer to use while reading very small
letters ?
(i) A convex lens of focal length 50 cm
(ii) A convex lens of focal length 5cm
(iii) A concave lens of focal length 50 cm
(iv) A concave lens of focal length 5 cm
(h) The change of focal length of an eye-lens is caused by the action of the.
(i) Pupil
(ii) Retina
(iii) Ciliary muscles
(iv)ris
(i) Which of the following terms does not represent electrical power in a circuit ?
(i) IR2
(ii) I2R
(iii) v2/R
(iv) VI
(j) Which of the following constitute a food chain ?
(i) Grass, fish and goat
(ii) Goat, cow and elephant
(iii) Grass, goat and human
(iv) Grass, wheat and mango
