Q1. Identify the normally radioactive material in the following list. Q1. Identify the normally radioactive material in the following list.
(A) Plutonium (A) Plutonium
(B) Germanium (B) Germanium
(C) Osmium (C) Osmium
(D) Cadmium (D) Cadmium
Answer: (A) Plutonium Answer: (A) Plutonium
Plutonium is the only radioactive element in the list.
Plutonium is a radioactive, silvery-gray, metallic element with the symbol Pu and atomic number 94. It has a high surface tension and viscosity compared to other metals, and tarnishes when exposed to air. Plutonium is created in a reactor when uranium atoms absorb neutrons, and is a by-product of nuclear power plants. It is the main fuel in fast neutron reactors, and more than one-third of the energy produced in most nuclear power plants comes from plutonium. Plutonium has five common isotopes, each with a different half-life, which is the time it takes to lose half of its radioactivityPlutonium is the only radioactive element in the list.
Plutonium is a radioactive, silvery-gray, metallic element with the symbol Pu and atomic number 94. It has a high surface tension and viscosity compared to other metals, and tarnishes when exposed to air. Plutonium is created in a reactor when uranium atoms absorb neutrons, and is a by-product of nuclear power plants. It is the main fuel in fast neutron reactors, and more than one-third of the energy produced in most nuclear power plants comes from plutonium. Plutonium has five common isotopes, each with a different half-life, which is the time it takes to lose half of its radioactivity
Q1. The Science which studies the crust of the earth. Q1. The Science which studies the crust of the earth.
What is one word substitution of the phrase?
What is one word substitution of the phrase?
(A) zoology (A) zoology
(B) etymology (B) etymology
(C) biology (C) biology
(D) geology (D) geology
Answer: (D) geology Answer: (D) geology
Substitute Word: geology.
Geology is a broad term that encompasses the study of Earth's solid, liquid, and gaseous parts, as well as the processes that shape them. It includes the study of rocks, minerals, fossils, and the history of the planet.Substitute Word: geology.
Geology is a broad term that encompasses the study of Earth's solid, liquid, and gaseous parts, as well as the processes that shape them. It includes the study of rocks, minerals, fossils, and the history of the planet.
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Q3. How many times the Jupiter is bigger than the Earth by diameter? Q3. How many times the Jupiter is bigger than the Earth by diameter?
(A) 8 (A) 8
(B) 9 (B) 9
(C) 10 (C) 10
(D) 11 (D) 11
Answer: (D) 11 Answer: (D) 11
11
With a radius of 43,440.7 miles (69,911 kilometers), Jupiter is 11 times wider than Earth.11
With a radius of 43,440.7 miles (69,911 kilometers), Jupiter is 11 times wider than Earth.
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Q4. The moon is an example of which type of object? Q4. The moon is an example of which type of object?
(A) Transparent (A) Transparent
(B) Translucent (B) Translucent
(C) Luminous (C) Luminous
(D) Non Luminous (D) Non Luminous
Answer: (D) Non Luminous Answer: (D) Non Luminous
Non Luminous
Moon is non-luminous. It do not produce light, it shines by reflecting the sunlight falling on it.Non Luminous
Moon is non-luminous. It do not produce light, it shines by reflecting the sunlight falling on it.
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Q6. Which is responsible for Earth's magnetic field? Q6. Which is responsible for Earth's magnetic field?
(A) Inner Core (A) Inner Core
(B) Outer Core (B) Outer Core
(C) Mantle (C) Mantle
(D) Crust (D) Crust
Answer: (B) Outer Core Answer: (B) Outer Core
Outer Core
The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.Outer Core
The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.
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Q7. When is National Science Day celebrated? Q7. When is National Science Day celebrated?
(A) 26 August (A) 26 August
(B) 13 July (B) 13 July
(C) 26 February (C) 26 February
(D) 28 February (D) 28 February
Answer: (D) 28 February Answer: (D) 28 February
28 February,
National Science Day is celebrated in India on February 28th each year to mark the discovery of the Raman effect by Indian physicist Sir C. V. Raman on 28 February 1928.28 February,
National Science Day is celebrated in India on February 28th each year to mark the discovery of the Raman effect by Indian physicist Sir C. V. Raman on 28 February 1928.
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Q8. Who was the first Nobel Prize winner in Physics? Q8. Who was the first Nobel Prize winner in Physics?
(A) Wilhelm Rontgen (A) Wilhelm Rontgen
(B) Hendrik Lorentz (B) Hendrik Lorentz
(C) Marie Curie (C) Marie Curie
(D) Pierre Curie (D) Pierre Curie
Answer: (A) Wilhelm Rontgen Answer: (A) Wilhelm Rontgen
Wilhelm Conrad Rontgen
Wilhelm Röntgen, on 8 November 1895, produced and detected electromagnetic radiation in a wavelength range known as X-rays or Röntgen rays and got the first Nobel Prize in Physics in 1901.Wilhelm Conrad Rontgen
Wilhelm Röntgen, on 8 November 1895, produced and detected electromagnetic radiation in a wavelength range known as X-rays or Röntgen rays and got the first Nobel Prize in Physics in 1901.
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Q9. Sound waves can't travel through Q9. Sound waves can't travel through
(A) Water (A) Water
(B) Air (B) Air
(C) Steel (C) Steel
(D) Vaccum (D) Vaccum
Answer: (D) Vaccum Answer: (D) Vaccum
Sound waves cannot travel in a vacuum. It can travel only through a material medium. e.g., solids, liquids and gases.Sound waves cannot travel in a vacuum. It can travel only through a material medium. e.g., solids, liquids and gases.
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Q10. Which of the following Indian Economist won Nobel Prize in Economic Science? Q10. Which of the following Indian Economist won Nobel Prize in Economic Science?
(A) Rabindranath Tagore (A) Rabindranath Tagore
(B) C. V. Raman (B) C. V. Raman
(C) Arundhti Roy (C) Arundhti Roy
(D) Amartya Sen (D) Amartya Sen
Answer: (D) Amartya Sen Answer: (D) Amartya Sen
Amartya Sen is the only Indian economist to win the Nobel Memorial Prize in Economic Sciences, which he received in 1998. Sen is known for his work on welfare economics, social choice theory, and development economics. He is also known for his interest in the problems of society's poorest members and his work on the causes of famine.Amartya Sen is the only Indian economist to win the Nobel Memorial Prize in Economic Sciences, which he received in 1998. Sen is known for his work on welfare economics, social choice theory, and development economics. He is also known for his interest in the problems of society's poorest members and his work on the causes of famine.