Science questions with answers, page 2

275 solved Science MCQs from SSC, RRB, banking and police exams. Open any question to try it and read the explanation. Want a timed test instead? Free Science practice sets.

PYQAfter fertilisation in humans, where does the growth and development of the embryo mainly occur?
PYQA wire has a resistance of 10 Ω. If it is stretched to three times its original length (volume remaining constant), its new resistance will be…
PYQThe far point of a myopic person is 80 cm in front of the eye. Assuming the far point for normal vision is infinity, what is the required power (P)…
PYQWhich of the following statements is/are true regarding the speed of sound? (i) The speed of sound decreases with an increase in the temperature of…
PYQTwo resistors of 5 Ω and 15 Ω are connected in series to a battery of 10 V. How much current will flow through the circuit?
PYQAn object has a mass of 12 kg and moves with a constant speed of 8 m/s. How much kinetic energy does it have?
PYQIf the speed of light in a medium is 2.25 × 10⁸ m/s, its refractive index is ________.
PYQA constant force of 21 N moves a body through 3 m in its own direction. Work done is ________.
PYQHow much work is required to move a charge of 3 C between two points that have a potential difference of 15 V?
PYQWhich condition is required for methane to undergo a substitution reaction with chlorine?
PYQWhich of the following isotopes is used in the treatment of cancer?
PYQThe deeply folded inner membrane of mitochondria helps to increase the ________ for ATP generation.
PYQA girl weighing 420 N climbs a rope to a height of 6 m and takes 20 seconds to do it. What is her power output?
PYQA sound wave has a frequency of 2 kHz and a wavelength of 45 cm. How much time will it take to cover a distance of 1.8 km?
PYQThe SI unit of the universal gravitation constant is ____________.
PYQA 2.0 cm tall object is placed 20 cm from a convex lens of focal length 15 cm. What is the magnification produced by the lens?
PYQThe female reproductive part of the flower is known as:
PYQIf a conductor has a potential difference of 1 V across its ends and a current of 1 A flows through it, what is the resistance of the conductor?
PYQWhat is the formula unit mass of ammonium sulphate (NH4)2SO4?
PYQThe alpha particles that passed straight through the gold foil showed that:
PYQIn a school canteen, students notice that many plastic cups and plates are thrown away daily. To solve this problem, they suggest switching to steel…
PYQWhich part of a plant cell helps it stay intact and prevents bursting in a hypotonic environment?
PYQA body of mass 10 kg is thrown vertically upwards with a velocity of 10 m/s. How much potential energy will be possessed by the body when it reaches…
PYQA train starting from rest reaches a speed of 40 km/h in 10 minutes. What is its final speed in m/s?
PYQA strong magnetic field produced inside a solenoid can be used to magnetise a piece of soft iron placed inside the coil. The resulting magnet is…
PYQIf the radius of the Earth were to double while mass remains the same, the new value of g would be ____________ the original value.
PYQIdentify the product formed when copper metal is exposed to dilute hydrochloric acid.
PYQChoose a term to complete the analogy. Apical Meristem : Length :: Lateral Meristem : ________________
PYQWhich cropping pattern maintains soil fertility through planned crop succession?
PYQA device often used in electric circuits to change the resistance without changing the voltage source is the ____________.
PYQThe location of an object is always described by specifying a point of reference known as the ____________.
PYQThe rough endoplasmic reticulum is associated with:
PYQWhich property do isobars share?
PYQ_______________ is a process in which persistent, non-degradable chemicals become progressively more concentrated at each higher trophic level in a…
PYQWhich of the following is the method used for refining metals such as copper, zinc and silver?
PYQWhat is formed when the male germ-cell from the pollen grain fuses with the female gamete in flowering plants?
PYQWhat specialisation is commonly found in the epidermal cells of plant roots to aid in their primary function?
Which plant tissue is mainly responsible for the transport of prepared food (sugars) from leaves to other parts?
Which of the following methods is commonly used to prevent rusting of iron?
Hypermetropia (long-sightedness) is corrected using a:
There are four elements P, Q, R and S and their atomic numbers are 2, 6, 13 and 18, respectively. Which of the following pairs has elements having…
The colour of scattered light depends on the size of the scattering particles. Very fine particles scatter mainly which colour of light?
The device used to measure electric current is:
Malaria is caused by which of the following?
Acceleration of a body is defined as the rate of change of its:
Who discovered penicillin, the first antibiotic, in 1928?
The change of state from ice to water is accompanied by ______.
The common name of sodium hydrogen carbonate is-
The chemical reaction between an acid and base is termed as:
Which cell organelle controls all the activities of the cell and contains genetic material?
The green pigment present in plants that absorbs sunlight is:
The concentration of which plant hormone is highest at the top of the plant and decreases as you get closer to the roots?
The common transport form of sugar in plants is-
Haemoglobin, a protein made of four separate polypeptide subunits joined together, is an example of which level of protein structure?
An element 'B' has two isotopes B-10 and B-11 with natural abundance 20% and 80% respectively. What is the average atomic mass of B?
If the speed of light in air and water are 2.40 x 10^8 m/s and 2.00 x 10^8 m/s respectively, then the refractive index of water with respect to air…
The scientist known as the 'Father of Genetics' for his experiments on pea plants is:
A boy walks from one end A to the other end B of a straight 1000 m road in 2 minutes and then turns around and walks 400 m back to point C in…
Which indicator turns red in an acidic solution and yellow in a basic solution?
The device used to measure potential difference (voltage) across a component is:
Which among the following mineral is essential for the synthesis of thyroid hormones (thyroxine)?
Which gas makes up the majority of the air we exhale?
The bending of a plant part in response to light is called
_______ is defined as the ratio of total path length traveled by an object and the total time interval during which the motion has taken place.
Whose law states that at a junction in an electric circuit, the sum of the currents flowing into the junction is equal to the sum of the currents…
Read the given statements and select the most appropriate option. Statement 1: Mirror formula is applicable to both concave and convex mirrors…
Minamata disease, a serious neurological illness first identified in Japan, was caused by long-term consumption of fish contaminated with which…
The colour of the hair is due to-
The SI unit of energy is the same as the SI unit of:
Which of these is an example of an aldehyde?
The ratio of sine of the angle of incidence to the sine of the angle of refraction is a constant for a given colour and for the given pair of media…
__________ is the inflammatory compound in pepper spray.
The splitting of white light into its constituent colours when passed through a prism is called:
The molecular mass of a compound is 63 u. If it contains one hydrogen atom and three oxygen atoms, the atomic mass of the remaining element is:
The upward and downward growth of shoots and roots, respectively, in response to the pull of earth or gravity, is called:
A small drop of a liquid falling freely in air takes a spherical shape mainly because of
The force of attraction between the Earth and any object near its surface is called:
Who is regarded as the 'Father of Genetics' for his pea plant hybridization experiments?
Suppose a number of rays parallel to the principal axis are falling on a concave mirror, then all the reflected rays will intersect:
Which of the following, when dissolved in water, turns blue litmus paper red?
Which effect of electric current is used in an electric heater?
Who formulated the Universal Law of Gravitation?
The chemical name of _______ is calcium sulphate hemihydrate.
IPCC, the body that assesses and publishes global scientific reports on climate change, stands for:
The characteristic color of Marine Algae depends on the pigments located in the plastids. Which pigment leads to 'Green' colour of the algae?
Which of the following is present in a plant cell but absent in an animal cell?
The IUPAC name for the first member of the alkyne series is:
An element 'Cu' has two isotopes Cu-63 and Cu-65 with natural abundance 70% and 30% respectively. What is the average atomic mass of Cu?
If the speed of light in vacuum and water are 3.00 x 10^8 m/s and 2.25 x 10^8 m/s respectively, then the refractive index of water with respect to…
The scientist known as the 'Father of Genetics' is:
The chemical formula of washing soda is:
Which vitamin deficiency causes scurvy, a disease marked by bleeding gums?
Which part of a flower is the sticky surface at the top of the pistil, it traps and holds the pollen?
A reaction in which heat is absorbed is called
The circumference of a planet is 36,000 km. If the planet makes no other movement and takes 20 hours for one complete rotation, what is the speed of…
The resistance of a wire is 2 Ω. If it is cut into four equal parts, the resistance of each part will be:
The difference between compound interest, compounded annually, and simple interest for 3 years at a rate of 20% per annum is ₹256. What is the…
Ramu has been given a tub of water with a refractive index of 1.33, a mug of oil with a refractive index of 1.46, a bottle of glycerine with a…
Standing up and supporting the lower back with hands, then gently arching back and holding this posture for some time is called as:
Which of these is a protein-rich food?