RSMSSB LDC Exam Paper 2018 (H to M) in English (Answer Key) – First Shift

21. Which of the following properties of light is used in making a periscope ?
(A) Polarization
(B) Dispersion
(C) Reflection
(D) Refraction
Show AnswerAnswer – C

22. The angle between the incident ray and the ray reflected from a plane-mirror is 60°. Through what angle is the reflected ray deviated with respect to the incident ray ?
(A) 60°
(B) 90°
(C) 150°
(D) 120°
Show AnswerAnswer – D

23. Which of the following is not a gaseous type cycle ?
(A) Oxygen cycle
(B) Phosphorus cycle
(C) Nitrogen cycle
(D) Carbon cycle
Show AnswerAnswer – B

24. Emasculation is achieved by
(A) Removal of Sepals
(B) Removal of Petals
(C) Removal of Style
(D) Removal of Anther
Show AnswerAnswer – D

25. Which of the following microorganism yields restriction enzyme ?
(A) All of these
(B) H-influenzae
(C) I-aquaticus
(D) E-coli
Show AnswerAnswer – C

26. Mendel had also worked on one more plant other than pea. That was

(A) Bean
(B) Hieracium
(C) Antirrhinum
(D) Maize
Show AnswerAnswer – B

27. Which of the following Rice variety is a popular biopatent ?
(A) Sona Masuri
(B) Basmati
(C) Rajabhogam
(D) Ponni
Show AnswerAnswer – B

28. Which disease is caused by deficiency of vitamin C ?
(A) Night blindness
(B) Beri-Beri
(C) Scurvy
(D) Goitre
Show AnswerAnswer – C

29. Chromosomes network can network can not be stained by
(A) Feulgen stain
(B) Carmine
(C) Haematoxylin
(D) Crystal violet
Show AnswerAnswer – D

30. Producing new crop varieties where two or more plants of, unlike genetic constitution are crossed called as –
(A) Hybridization
(B) Mutation
(C) Asexual Reproduction
(D) Heterosis
Show AnswerAnswer – B

31. Vermicompost is considered to be the best ecofriendly manure obtained from
(A) Termites
(B) Earthworms
(C) Nematodes
(D) Ants
Show AnswerAnswer -B

32. Which blood group is called universal donor ?
(A) O-
(B) AB-
(C) B+
(D) A+

Show AnswerAnswer – A

33. Approximately how much energy is transferred from one trophic level to a another in an ecosystem ?
(A) 60%
(B) 50%
(C) 25%
(D) 10%
Show AnswerAnswer – D

34. Ammonofying bacteria convert
(A) Nitrates to ammonia
(B) Nitrites to ammonia
(C) Ammonia to nitrites
(D) Wastes in to ammonia
Show AnswerAnswer – C

35. How long biological patent remain effective in India ?
(A) 20 years
(B) 6 years
(C) 10 years
(D) 15 years
Show AnswerAnswer – A

36. Sudden heritable changes in an organism is called as –
(A) Clonal selection
(B) Acclimatization
(C) Mutation
(D) Breeding
Show AnswerAnswer – C

37. The saponification of a fat or oil is done using ______ solution for hot process.
(A) NaCl
(B) HCI
(C) NaOH
(D) KOH
Show AnswerAnswer – C

38. Producer gas is mixture of the following:
(A) CO + H2
(B) CO2 + N2
(C) CO + H2
(D) CO + N2
Show AnswerAnswer – A

39. Water gas is a mixture of –
(A) CO and CO₂

(B) CO and H₂O
(C) CO and H₂
(D) CO and N₂
Show AnswerAnswer – C

40. Freon group of refrigerants are –
(A) non-toxic and inflammable
(B) non-inflammable and moderately toxic
(C) toxic
(D) inflammable
Show AnswerAnswer – B

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