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The dark lines in the solar spectrum are due to A. absorption of corresponding wavelengths by the outer layers of the sun B. destructive interference between waves of certain definite wavelengths C. absorption of corresponding wavelengths by the prism used in the photograph D. absence of corresponding wavelengths from the light emitted by the core of the sun
SEE ANSWER
Option A
Question:- In an atomic nucleus, neutrons and protons are held together by A. gravitational forces B. exchange forces C. coulombic forces D. magnetic forces
Answer:- Option B
Question:- Atoms of an element differ from those of all other elements in A. atomic number and electronic configuration B. number of neutrons and number of valence electrons C. atomic number and number of valence electrons D. number of neutrons and electronic configuration
Answer:- Option A
Question:- Nuclear fission is caused by the impact of A. neutron B. proton C. deuteron D. electron
Answer:- Option A
Question:- Which of the following rays are more penetrating? A. Beta rays B. Alpha rays C. Gamma rays D. X-rays
Answer:- Option C
Question:- How many colours the sunlight spectrum has? A. Three B. Seven C. Four D. Five
Answer:- Option B
Question:- Which is/are the important raw material(s) required in cement industry? A. Gypsum and Clay B. Clay C. Limestone and Clay D. Limestone
Answer:- Option C
Question:- Which type of fire extinguisher is used for petroleum fire? A. Powder type B. Liquid type C. Soda acid type D. Foam type
Answer:- Option A
Question:- Epoxy resins are used as A. detergents B. insecticides C. adhesives D. moth repellents
Answer:- Option C
Question:- Detergents used for cleaning clothes and utensils contain? A. bicarbonates B. bismuthates C. sulphonates D. nitrates
Answer:- Option C
Question:- Which of the following is used for removing air bubbles from glass during its manufacture? A. Arsenous oxide B. Potassium carbonate C. Soda ash D. Feldspar
Answer:- Option A
Question:- Which of the following is a protein? A. Natural rubber B. Starch C. Cellulose D. None of these
Answer:- Option A
Question:- Wood is the main raw material for the manufacture of A. paint B. paper C. ink D. gun powder
Answer:- Option B
Question:- Rayon is chemically A. cellulose B. pectin C. glucose D. amylase
Answer:- Option A
Question:- Optic fibres are mainly used for which of the following? A. Musical instruments B. Food industry C. Weaving D. Communication
Answer:- Option D
