1- Why is the light of an ordinary lamp hotter than that of a tube light?
A. It is due to ionization of gases
B. Distribution of energy
C. It is due to incandescence
D. None of these
View Answer
Answer : C. It is due to incandescence
Description
2- Substances are radioactive if they have:
A. Unstable nuclei
B. Nuclei with a lesser number of neutrons
C. Electrons removed from the outermost shell
D. Electrons in their nuclei
View Answer
Answer : A. Unstable nuclei
Description
3- When nuclear energy is intended to be harnessed for the generation of electricity, potentially destructive neutrons released in a nuclear reactor are absorbed by:
A. Cubical blocks of steel
B. Long rods of Cd (Cadmium)
C. Heavy water
D. A pile of blocks made of graphite
View Answer
Answer : B. Long rods of Cd (Cadmium)
Description
4- Nuclear power reactors are operated at low temperatures and consequently with lower efficiency because:
A. High pressure inside the reactor reduces the temperature
B. Uranium is difficult to heat
C. The walls of nuclear reactors cannot withstand high temperatures
D. Nuclear heat is carried by ordinary steam
View Answer
Answer : D. Nuclear heat is carried by ordinary steam
Description
5- The energy emitted from the sun is supposed to be due to:
A. Nuclear fission
B. Nuclear fusion
C. Both A and B
D. None of these
View Answer
Answer : B. Nuclear fusion
Description
6- Raw materials used for the manufacture of glass are:
A. Sand/soda/limestone
B. Sand/charcoal/soda
C. Both A and B
D. None of these
View Answer
Answer : A. Sand/soda/limestone
Description
7- The AIDS virus has:
A. Double-stranded RNA
B. Double-stranded DNA
C. Single-stranded RNA
D. None of these
View Answer
Answer : C. Single-stranded RNA
Description
8- The urine of a diabetes patient contains more than the average quantity of which of the following?
A. Sugar
B. Urea
C. Uric acid
D. Albumin
View Answer
Answer : A. Sugar
Description
9- A form of heart disease in which blood supply to the heart is inadequate is known as:
A. Hepatitis
B. Alopecia
C. Angina
D. Pericarditis
View Answer
Answer : C. Angina
Description
10- Which of the following diseases is characterized by inflammation of the membranes covering the brain and spinal cord?
A. Hepatitis
B. Sinusitis
C. Tonsillitis
D. Meningitis
View Answer
Answer : D. Meningitis
Description
11- Amnesia is related to:
A. Sleeping sickness
B. Loss of hearing
C. Loss of sight
D. Loss of memory
View Answer
Answer : D. Loss of memory
Description
12- A heart attack is caused due to:
A. Blood sugar
B. Cholesterol
C. Blood protein
D. Blood urea
View Answer
Answer : B. Cholesterol
Description
13- Which of the following diseases has posed a serious threat the world over?
A. Tumour
B. Paralytic stroke
C. AIDS
D. Tuberculosis
View Answer
Answer : C. AIDS
Description
14- A plant with green leaves placed in red light will appear:
A. Black
B. Green
C. Red
D. None of these
View Answer
Answer : A. Black
Description
15- The common refrigerant used in domestic refrigerators is:
A. Neon
B. Freon/ammonia
C. Spirit
D. None of these
View Answer
Answer : B. Freon/ammonia
Description
16- Who said, "A body will remain at rest unless an external force acts on the body"?
A. Newton
B. Einstein
C. Archimedes
D. Galileo
View Answer
Answer : A. Newton
Description
17- Which metal is commonly used as an electromagnet?
A. Nickel
B. Iron
C. Copper
D. None of these
View Answer
Answer : B. Iron
Description
18- Which of the following does not admit any division?
A. Atom
B. Molecules
C. Compound
D. None of these
View Answer
Answer : A. Atom
Description
19- A dynamo converts:
A. Electrical energy into mechanical energy
B. Mechanical energy into magnetic energy
C. Mechanical energy into electrical energy
D. None of these
View Answer
Answer : C. Mechanical energy into electrical energy
Description
20- In an electronic watch, the component corresponding to the pendulum of a pendulum clock is:
