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
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Q4. The science concerned with the properties of sound. Q4. The science concerned with the properties of sound.
What is one word substitution of the phrase?
What is one word substitution of the phrase?
(A) Acrobatics (A) Acrobatics
(B) Acoustics (B) Acoustics
(C) Geology (C) Geology
(D) Pedagogy (D) Pedagogy
Answer: (B) Acoustics Answer: (B) Acoustics
Substitute Word: Acoustics.
Acoustics deals with the generation, propagation, reception, and control of sound waves.Substitute Word: Acoustics.
Acoustics deals with the generation, propagation, reception, and control of sound waves.
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Q5. Which of the following Indian Economist won Nobel Prize in Economic Science? Q5. 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.
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Q6. Beyond what distance a normal eye can see objects clearly? Q6. Beyond what distance a normal eye can see objects clearly?
(A) 20 cm (A) 20 cm
(B) 30 cm (B) 30 cm
(C) 25 cm (C) 25 cm
(D) 35 cm (D) 35 cm
Answer: (C) 25 cm Answer: (C) 25 cm
For a clear vision, the image must be on the retina. The image distance is therefore fixed for clear vision and it equals the distance of retina from eye lens. It is about 25 cm for a grown up person. A person can theoretically have clear vision of an object situated at any large distance from the eye.For a clear vision, the image must be on the retina. The image distance is therefore fixed for clear vision and it equals the distance of retina from eye lens. It is about 25 cm for a grown up person. A person can theoretically have clear vision of an object situated at any large distance from the eye.
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Q7. How many times the Jupiter is bigger than the Earth by diameter? Q7. 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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Q9. The Science which studies the crust of the earth. Q9. 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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Q10. The weight of an object on the moon is equal to ___ of its weight on the earth. Q10. The weight of an object on the moon is equal to ___ of its weight on the earth.
(A) 1/3 (A) 1/3
(B) 1/4 (B) 1/4
(C) 1/5 (C) 1/5
(D) 1/6 (D) 1/6
Answer: (D) 1/6 Answer: (D) 1/6
1/6th
The moon's gravitational force is only about 16.6 % of Earth's gravity which means an object would weigh six times less on the moon than they do on Earth.1/6th
The moon's gravitational force is only about 16.6 % of Earth's gravity which means an object would weigh six times less on the moon than they do on Earth.