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
Q4. Which are the planets in our solar system which do not have any natural satellite? Q4. Which are the planets in our solar system which do not have any natural satellite?
(A) Mercury and Mars (A) Mercury and Mars
(B) Venus and Mars (B) Venus and Mars
(C) Uranus and Mars (C) Uranus and Mars
(D) Mercury and Venus (D) Mercury and Venus
Answer: (D) Mercury and Venus Answer: (D) Mercury and Venus
Q5. When is National Science Day celebrated? Q5. 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.
Q6. What vitamin is contained in the Sun light ? Q6. What vitamin is contained in the Sun light ?
(A) Vitamin A (A) Vitamin A
(B) Vitamin B (B) Vitamin B
(C) Vitamin C (C) Vitamin C
(D) Vitamin D (D) Vitamin D
Answer: (D) Vitamin D Answer: (D) Vitamin D
Vitamin D
The body creates vitamin D from direct sunlight on the skin when outdoors. But between October and early March we do not make enough vitamin D from sunlight.Vitamin D
The body creates vitamin D from direct sunlight on the skin when outdoors. But between October and early March we do not make enough vitamin D from sunlight.
Q7. What is the lower fixed point of fahrenheit scale? Q7. What is the lower fixed point of fahrenheit scale?
(A) 0°F (A) 0°F
(B) 32°F (B) 32°F
(C) 180°F (C) 180°F
(D) 212°F (D) 212°F
Answer: (B) 32°F Answer: (B) 32°F
The lower fixed point in Fahrenheit scale is 32 degree and upper fixed point in Fahrenheit scale is 212 degree. The difference between the two is 180, hence number of division is 180.The lower fixed point in Fahrenheit scale is 32 degree and upper fixed point in Fahrenheit scale is 212 degree. The difference between the two is 180, hence number of division is 180.
Q9. Which social science studies the production, distribution and consumption of wealth? Q9. Which social science studies the production, distribution and consumption of wealth?
(A) Commerce (A) Commerce
(B) Economics (B) Economics
(C) Political Science (C) Political Science
(D) Sociology (D) Sociology
Answer: (B) Economics Answer: (B) Economics
Economics is the social science that studies the production, distribution, and consumption of goods and services, including wealth. Economics is divided into two classes, microeconomics and macroeconomics, and it directly affects everyday life.
Economics is primarily concerned with analyzing the choices that individuals, businesses, governments, and nations make to allocate limited resources. Economic models emerged from the broader field of political economy in the late 19th century.Economics is the social science that studies the production, distribution, and consumption of goods and services, including wealth. Economics is divided into two classes, microeconomics and macroeconomics, and it directly affects everyday life.
Economics is primarily concerned with analyzing the choices that individuals, businesses, governments, and nations make to allocate limited resources. Economic models emerged from the broader field of political economy in the late 19th century.