General Science - MCQ Practice Questions

Which plant hormone is known to have antagonistic effects to gibberellins in seed germination?

Which of the following transport mechanisms does NOT require energy in plant cells?

The phenomenon of senescence in plants is primarily controlled by which hormone?

Which of the following is a chemosynthetic organism commonly found in soil?

The rate of photosynthesis increases with an increase in CO2 concentration until it reaches a plateau. This plateau is called:

A lens has a focal length of 15 cm. What is its power?

An object is placed 30 cm in front of a concave mirror with focal length 10 cm. Where is the image formed?

A transformer has 500 turns in primary and 100 turns in secondary coil. If primary voltage is 220V, what is the secondary voltage?

A current-carrying conductor is placed in a magnetic field perpendicular to it. What force acts on it?

A radioactive element has a half-life of 10 years. After 30 years, what fraction of the original sample remains?

Which statement about elastic collisions is correct?

What is the young's modulus of a material?

A convex lens of focal length 20 cm is used as a magnifying glass. If an object is placed 5 cm from the lens, what is the nature of the image?

A car moving at 72 km/h applies brakes and comes to rest in 8 seconds. What is the deceleration?

Which of the following elements has an electronic configuration of 2, 8, 7?

The refractive index of a medium is 1.5. What is the speed of light in that medium? (c = 3 × 10⁸ m/s)

A spring with spring constant k = 100 N/m is compressed by 0.2 m. What is the elastic potential energy stored?

Which hormone is responsible for regulating blood glucose levels?

A 5 kg object is lifted vertically at constant velocity. What is the work done by gravity? (Height = 10 m, g = 10 m/s²)

What is the equivalent resistance when three resistors of 6Ω, 3Ω, and 2Ω are connected in parallel?