SOE MERITORIOUS EXAM ANSWER KEY CLASS 9 SCIENCE 2024

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 पानी (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