A. 1 proton & 1 neutron
B. 2 protons
C. 1 proton and 1 electron
D. 2 neutrons only
✅ The correct answer is option A.
SSC
612. Froth & Foams are examples of which of the following ?
A. solid suspended in gas
B. liquid suspended in gas
C. gas suspended in liquid
D. gas suspended in solid
✅ The correct answer is option C.
613. Cassiterite is an ore of which of the following ?
A. Iron
B. Zinc
C. Copper
D. Tin
✅ The correct answer is option D.
614. Which among the following was the first artificially produced element?
A. Neptunium
B. Ununbium
C. Technetium
D. none of the above
✅ The correct answer is option C.
615. Steel is an alloy consisting mostly of iron, with a carbon content between 0.2% and 2.1% by weight. An increasing amount of Iron will result in which of the following?
A. Increase Hardening
B. Decrease Hardening
C. Increase ductility
D. Increase melting Point
✅ The correct answer is option A.
616. Duralumin which is used in making aero planes is an alloy consisting of _____?
A. Aluminum & Copper
B. Aluminum, Copper & Manganese
C. Aluminum, Copper, Manganese & Magnesium
D. Aluminum and zinc
✅ The correct answer is option C.
617. A Cyclotron is ___?
A. A charged particle
B. A particle Accelerator
C. A magnetic particle
D. A radioactive particle
✅ The correct answer is option B.
618. As per Avogadro‘s hypothesis , equal volumes of different gases at the same temperature and pressure contain equal number of ______?
A. Atoms
B. Molecules
C. Particles
D. Electrons
✅ The correct answer is option B.
619. What is the atomic number of Transuranic elements?
A. Greater than 90
B. Greater than 92
C. Greater than 91
D. Greater than 93
✅ The correct answer is option B.
620. Which among the following is a correct definition of Cyclotron?
A. Accelerator of charged atomic particles
B. Device for detection of High Energy atomic radiation
C. Device for storing electric charge
D. Device for storing heat
✅ The correct answer is option A.