Govt. Examwise MCQ
112 Science MCQ Questions in english हिन्दी
Read science multiple choice questions for the various types of competitive exams. These science questions will help students to prepare for their exams. Improve your Science subject knowledge by reading these science questions.
Which component of the blood is responsible for carrying oxygen to the body's cells?
Red cells contain a special protein called hemoglobin, which helps carry oxygen from the lungs to the rest of the body and then returns carbon dioxide from the body to the lungs so it can be exhaled.
What is the process by which water vapor turns directly into ice without becoming a liquid?
The opposite of sublimation is "deposition", where water vapor changes directly into ice—such a snowflakes and frost. It is not easy to actually see sublimation occurring, at least not with ice. One way to see the results of sublimation is to hang a wet shirt outside on a below-freezing day.
Which scientist formulated the laws of motion and universal gravitation?
Sir Isaac Newton was born especially tiny but grew into a massive intellect and still looms large, thanks to his findings on gravity, light, motion, mathematics, and more.
What is the chemical symbol for gold?
Gold's chemical symbol AU is derived from the Latin word aurum, meaning gold. Some claim that the word aurum also means shining dawn due to its etymological ties to the word aurora, meaning dawn. The word gold comes from the old English word for yellow, geolu, which was derived from the Germanic word gulþa.
Which type of electromagnetic radiation has the shortest wavelength?
Gamma Rays- Gamma Rays-have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum. These waves are generated by radioactive atoms and in nuclear explosions. Gamma-rays can kill living cells, a fact which medicine uses to its advantage, using gamma-rays to kill cancer cells
What causes tides on Earth?
They are caused by the gravitational forces exerted on the earth by the moon, and to a lesser extent, the sun. When the highest point in the wave, or the crest, reaches a coast, the coast experiences a high tide. When the lowest point, or the trough, reaches a coast, the coast experiences a low tide.
Which planet is known as the "Red Planet"?
Mars is sometimes called the Red Planet. It's red because of rusty iron in the ground. Like Earth, Mars has seasons, polar ice caps, volcanoes, canyons, and weather.
What is the process by which plants make their own food using sunlight?
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
What is the smallest unit of matter?
Atoms are the smallest units of matter that have all the characteristics of an element. Atoms combine to form molecules. Atoms are composed of smaller particles known as protons, neutrons, and electrons.
Which gas is responsible for the green color of leaves in plants?
Chlorophyll is responsible for the green color of many plants and algae. Seen through a microscope, chlorophyll is concentrated within organisms in structures called chloroplasts – shown here grouped inside plant cells.
Mrinal's father has just one daughter, who is Rohit's mother. What bond does Mrinal's husband have with Rohit?
Daya and Anil are brothers; Daya's father is Chandu, and Chandu's father is Balbeer. How is Balbeer related to Anil?
In an atomic explosion, a tremendous amount of energy is produced as a result of
What separates isotopes is:
X-rays have a wavelength in the range of
There are mesons in
Which radioactive contaminant recently caught the attention of the public because it was found in construction materials?
Using the nautical mile as a unit of measurement,
Which of the following is a unit of speed known as a knot?
Which of the following is utilised in nuclear reactors as a moderator?
Which of the following is a radioactive element's positively charged particle?
Atoms are made up of:
The unit for bars is
Which of the following gases undergoes decrease during the process?
Kilowatt is a measurement unit for:
Electric current can be detected using:
Using a chronometer, you can:
A light year is a unit of