A. Hydrogen
B. Helium
C. Nitrogen
D. Oxygen
✅ The correct answer is option B.
Which among the following is the most important characteristic of Noble metals?
A. Luster
B. Non reactive nature
C. Preciousness
D. Rare availability
✅ The correct answer is option B.
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.
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.
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.
Cassiterite is an ore of which of the following ?
A. Iron
B. Zinc
C. Copper
D. Tin
✅ The correct answer is option D.
Which of the following are found in nucleus of Deuterium
A. 1 proton & 1 neutron
B. 2 protons
C. 1 proton and 1 electron
D. 2 neutrons only
✅ The correct answer is option A.
Which among the following provides the centripetal force to an electron circulating around the nucleus?
A. electrostatic forces of repulsion
B. electrostatic force of attraction
C. speed of the electron
D. nuclear charge
✅ The correct answer is option B.
Which among the following of a catalyst does not change at the end of a reaction?
A. Quantity
B. Chemical Composition
C. Both Quantity and Chemical com position
D. None of the above
✅ The correct answer is option C.