Half yearly exams in CBSE Class 10 include chapters from Physics, Chemistry, and Biology such as Chemical Reactions, Light Reflection, Life Processes, and Electricity. Practice these 40 important MCQs for better performance in school exams.
- Which type of reaction is combination of two substances to form single product.
A. Decomposition
B. Combination
C. Displacement
D. Double displacement
Ans B - The image formed by a concave mirror when object is beyond C is
A. Virtual and erect
B. Real and inverted
C. Virtual and inverted
D. Real and erect
Ans B - Which gas is released during photosynthesis.
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide
Ans A - The unit of electric current is
A. Volt
B. Ampere
C. Watt
D. Ohm
Ans B - Which acid is present in vinegar.
A. Citric
B. Hydrochloric
C. Acetic
D. Sulphuric
Ans C - The process of breakdown of glucose in presence of oxygen is
A. Respiration
B. Digestion
C. Excretion
D. Photosynthesis
Ans A - The SI unit of resistance is
A. Volt
B. Ampere
C. Ohm
D. Joule
Ans C - Which metal is used in galvanization.
A. Copper
B. Zinc
C. Iron
D. Aluminium
Ans B - The focal length of a plane mirror is
A. Infinite
B. Zero
C. One
D. Two
Ans A - Which organ helps in pumping blood.
A. Liver
B. Kidney
C. Heart
D. Lungs
Ans C - The process of coating iron with zinc is called
A. Alloying
B. Galvanization
C. Oxidation
D. Reduction
Ans B - Which part of eye controls amount of light entering.
A. Iris
B. Retina
C. Cornea
D. Lens
Ans A - The chemical formula of baking soda is
A. NaOH
B. NaCl
C. NaHCO3
D. Na2CO3
Ans C - Which gas causes acid rain.
A. CO2
B. SO2
C. O2
D. N2
Ans B - The energy possessed by a body due to motion is
A. Potential
B. Kinetic
C. Chemical
D. Heat
Ans B - Which mirror is used as rear view mirror in vehicles.
A. Concave
B. Convex
C. Plane
D. None
Ans B - Which part of plant prepares food.
A. Root
B. Stem
C. Leaf
D. Flower
Ans C - Which metal is liquid at room temperature.
A. Mercury
B. Iron
C. Copper
D. Aluminium
Ans A - The SI unit of work is
A. Joule
B. Newton
C. Watt
D. Pascal
Ans A - Which vitamin helps in blood clotting.
A. A
B. B
C. C
D. K
Ans D - Which organ purifies blood.
A. Kidney
B. Heart
C. Lungs
D. Liver
Ans A - The unit of electric power is
A. Watt
B. Volt
C. Ampere
D. Ohm
Ans A - Which lens is used to correct myopia.
A. Convex
B. Concave
C. Plane
D. Cylindrical
Ans B - The process of loss of electrons is
A. Reduction
B. Oxidation
C. Neutralization
D. Displacement
Ans B - Which gas is used in electric bulbs.
A. Argon
B. Oxygen
C. Nitrogen
D. Hydrogen
Ans A - Which hormone regulates blood sugar.
A. Insulin
B. Thyroxine
C. Adrenaline
D. Estrogen
Ans A - Which element is needed for hemoglobin formation.
A. Iron
B. Calcium
C. Sodium
D. Potassium
Ans A - The unit of potential difference is
A. Volt
B. Ampere
C. Ohm
D. Watt
Ans A - Which disease is caused by iodine deficiency.
A. Rickets
B. Goitre
C. Scurvy
D. Night blindness
Ans B - Which part of brain controls thinking.
A. Cerebrum
B. Cerebellum
C. Medulla
D. Hypothalamus
Ans A - The process of conversion of sugar into alcohol is
A. Distillation
B. Fermentation
C. Filtration
D. Crystallization
Ans B - Which gas is responsible for global warming.
A. CO2
B. O2
C. H2
D. N2
Ans A - The boiling point of water is
A. 100 degree C
B. 90 degree C
C. 110 degree C
D. 80 degree C
Ans A - Which part of ear helps in balance.
A. Cochlea
B. Eustachian tube
C. Semicircular canal
D. Auditory nerve
Ans C - Which organ produces bile juice.
A. Liver
B. Kidney
C. Heart
D. Lungs
Ans A - Which metal is best conductor of electricity.
A. Silver
B. Gold
C. Copper
D. Iron
Ans A - Which vitamin is obtained from sunlight.
A. A
B. B
C. C
D. D
Ans D - The SI unit of force is
A. Joule
B. Watt
C. Newton
D. Pascal
Ans C - Which lens is used in magnifying glass.
A. Convex
B. Concave
C. Plane
D. None
Ans A - Which part of cell controls all activities.
A. Cytoplasm
B. Nucleus
C. Cell wall
D. Mitochondria
Ans B
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