NSO Level 2 Class 7 Past Paper Questions 2012 − 13 Part 4

Glide to success with Doorsteptutor material for NSO-Level-2 Class-7: fully solved questions with step-by-step explanation- practice your way to success.

Q. 29 Gases which are released into the air as pollutants dissolve in rain drops to form acids. Which of the following makes the rain acidic?

(A) Sulphuric acid and Nitric acid

(B) Sulphuric acid, Nitric acid and Carbonic acid

(C) Nitric acid and Hydrochloric acid

(D) Sulphuric acid, Nitric acid and Hydrochloric acid

NCERT Class 6 Science Chapter 15: Air (NSO/NSTSE/Olympiad) | English|CBSE

Q. 44 Which diagram shows the path of oxygen and carbon dioxide during respiration in a fish?

(A)

Carbon Dioxide and Oxygen

(B)

Carbon Dioxide and Oxygen

(c)

Carbon Dioxide and Oxygen

(D)

Carbon Dioxide and Oxygen

NCERT Class 7 Science Chapter 10: Respiration in Organisms (NSO/NSTSE) | English

Q. 45 During the process of inhalation in human beings …

(A) Diaphragm contracts but external Intercoastal muscles and lungs expand.

(B) Diaphragm expands but external Intercoastal muscles and lungs contract.

(C) Diaphragm and external Intercoastal muscles expand but lungs contract.

(D) Diaphragm and external Intercoastal muscles contract but lungs expand.

NCERT Class 7 Science Chapter 10: Respiration in Organisms (NSO/NSTSE) | English

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