When zinc reacts with dilute sulphuric acid, which gas is produced?
AOxygen
BHydrogen
CCarbon dioxide
DNitrogen
Class 6Science
The villi in the small intestine primarily function to:
AStore undigested food
BIncrease surface area for absorption
CSecret hydrochloric acid
DProduce bile
Class 8Science
Which of the following is the SI unit of pressure?
ANewton
BPascal
CJoule
DWatt
Class 8Science
An electric bell works on the principle of which effect of electric current?
AHeating effect
BMagnetic effect
CChemical effect
DLighting effect
Class 9Science
A body is thrown vertically upwards with a velocity of 40 m/s. What is the maximum height reached? (Take g = 10 m/s²)
A20 m
B40 m
C80 m
D160 m
Class 6Science
Which of the following nutrients is essential for growth and repair of body tissues?
ACarbohydrates
BProteins
CFats
DVitamins
Class 10Science
Baking soda is chemically known as:
ASodium carbonate
BSodium bicarbonate
CSodium chloride
DSodium hydroxide
Class 7Science
Dissolving salt in water is reversible because the water can be evaporated to recover the salt. This is a:
APhysical (reversible) change
BChemical (irreversible) change
CA biological change
DA nuclear change
About Science Mock Tests
Science covers physics, chemistry, and biology concepts for classes 6 through 10 as per NCERT and CBSE curriculum. Topics include matter, energy, force, light, sound, electricity, magnetism, chemical reactions, acids and bases, metals and non-metals, cell biology, anatomy, ecology, environment, and scientific methods. Practice with comprehensive science questions to build conceptual clarity and prepare for Class 6-10 examinations and competitive science tests.
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