SOE MERITORIOUS EXAM ANSWER KEY CLASS 9 SCIENCE 2024 SET A
Question 61:
- Which of the following metals is used to make objects appear shining?
- (A) Copper
- (B) Iron
- (C) Aluminium
- (D) Chromium (This is the answer)
Question 62:
- What is the full form of LED?
- (A) Light Emitting Diode (This is the answer)
- (B) Light Energy Diode
- (C) Light Electric Diode
- (D) None of these
Question 63:
- Coating of which of the following metals is used for galvanisation?
- (A) Aluminium
- (B) Zinc (This is the answer)
- (C) Copper
- (D) Silver
Question 64:
- Filament of a bulb glows, this happens due to which effect of current?
- (A) The chemical effect of current
- (B) The heating effect of current (This is the answer)
- (C) The magnetic effect of current
- (D) None of these
Question 65:
- Which of the following is added to distilled water to make it conduct electricity?
- (A) NaCl (This is the answer)
- (B) Lemon Juice
- (C) HCl
- (D) All of the above
Question 66:
- The process of depositing a thin layer of desired metal on another material by means of electricity is called?
- (A) Electric current
- (B) Electroplating (This is the answer)
- (C) Electric bell
- (D) None of these
Question 67:
- Which of the following is a good conductor of electricity?
- (A) Rubber
- (B) Bakelite
- (C) Graphite (This is the answer)
- (D) P.V.C.
Question 68:
- Which of the following processes is based on the principle of chemical effects of current?
- (A) Distillation
- (B) Crystallisation
- (C) Electroplating (This is the answer)
- (D) None of these
Question 69:
- Which gas/gases are produced during the electric decomposition of water?
- (A) Hydrogen
- (B) Oxygen
- (C) Both (A) and (B) (This is the answer)
- (D) None of the above
Question 70:
- Which of the following is an electrolyte?
- (A) Glucose
- (B) Salt (This is the answer)
- (C) Honey
- (D) Sugar
Question 71
- The long journey aeroplanes fly in this zone of the atmosphere to save fuel.
- (A) Troposphere
- (B) Stratosphere (This is the answer)
- (C) Mesosphere
- (D) Thermosphere
Question 72
- If the sliding friction between two surfaces is found to be 15N, then the static friction between those surfaces would be
- (A) 10N
- (B) 5N
- (C) 20N (This is the answer)
- (D) 7N
Question 73
- An object is placed at 20 cm in front of a plane mirror. What is the distance of image from the object?
- (A) 10 cm
- (B) 20 cm (This is the answer)
- (C) 30 cm
- (D) 40 cm
Question 74
- Which part of our eye controls the light entering into it?
- (A) Retina
- (B) Cornea
- (C) Lens
- (D) Iris (This is the answer)
Question 75
-
What is the value of angle 'r' in this diagram?
- (A) 60°
- (B) 90°
- (C) 30° (This is the answer)
- (D) 40°
Sure, based on the image you sent, here are all the MCQs and their answers:
Question 76
- What is the cause of repulsion between two bodies?
- (A) Magnetic Force (This is the answer)
- (B) Gravitational Force
- (C) Electrostatic Force
- (D) Both (A) and (C)
Question 77
- What should be the correct positions where the water should fall down from given outlets?
The image shows three outlets labeled P, Q, and R and a bucket labeled with the word рдкाрдиी (paani) which means water in Hindi.
- (A) R → B, Q → A, P → C
- (B) R → A, Q → B, P → C (This is the answer)
- (C) R → C, Q → B, P → A
- (D) R → B, Q → C, P → A
Question 78
- Loudness of sound depends upon:
- (A) Amplitude (This is the answer)
- (B) Wavelength
- (C) Frequency
- (D) Time Period
Question 79
- Sound can never travel through:
- (A) Air
- (B) Solids (This is the answer)
- (C) Water
- (D) Vacuum
Question 80
- An object oscillates 60 times in one second. Its frequency is:
- (A) 30Hz
- (B) 60Hz (This is the answer)
- (C) 120Hz
- (D) 20Hz
The image you sent is a page from a biology question paper in Hindi. Here are all the MCQs and their answers based on the image:
Question 81
-
Nitrogen fixing bacteria is present in the roots of which plant?
- (A) Rice
- (B) Mustard
- (C) Pea (This is the answer)
- (D) Wheat
Question 82
-
The production of crops without using fertilisers is called....
- (A) Organic Farming (This is the answer)
- (B) Mixed Cropping
- (C) Crop Rotation
- (D) None of these
Question 83
-
Vaccines are made up of.
- (A) Fungus
- (B) Sodium benzoate
- (C) Yeast
- (D) Weak or dead micro-organisms (This is the answer)
Question 84
-
Which of the following diseases cured using antibiotics?
- (A) AIDS
- (B) Dengue
- (C) Typhoid (This is the answer)
- (D) Malaria
Question 85
-
The gas released during the preparation of bread is....
- (A) Oxygen
- (B) Carbon dioxide (This is the answer)
- (C) Nitrogen
- (D) Sulphur dioxide
Question 86:
- International Biodiversity Day is celebrated on
- (A) 21 March
- (B) 17 June (This is the answer)
- (C) 22 April
- (D) 22 May
Question 87:
- Red Data Book is a book which keeps a record of all the
- (A) Endemic species
- (B) Extinct species (This is the answer)
- (C) Endangered species
- (D) Vulnerable species
Question 88:
-
Which one of the following is a hermaphrodite?
- (A) Earthworm
- (B) Hydra (This is the answer)
- (C) Amoeba
- (D) Yeast
Question 89:
-
The stage of the embryo in which all the body parts can be identified is
- (A) New born baby
- (B) Sperm
- (C) Foetus (This is the answer)
- (D) Zygote
Question 90:
-
Which of the following hormone is produced by Pituitary gland?
- (A) Insulin
- (B) Oestrogen
- (C) Growth hormone (This is the answer)
- (D) Thyroxine
