MCQs
Total Questions : 99
| Page 5 of 10 pages
Answer: Option D. -> None of the above
THE ELECTRONS WERE DISCOVERED BY J.J THOMPSON. PROTONS WERE DISCOVERED BY ERNEST RUTHERFORD. THE CHARGE TO MASS RATIO OF ELECTRONS WAS CALCULATED BY J.J THOMPSON.
THE ELECTRONS WERE DISCOVERED BY J.J THOMPSON. PROTONS WERE DISCOVERED BY ERNEST RUTHERFORD. THE CHARGE TO MASS RATIO OF ELECTRONS WAS CALCULATED BY J.J THOMPSON.
Answer: Option C. -> 11.4 days
THE HALF-LIFE OF RADIUM-223 ISOTOPE IS 11.4 DAYS. THE RADIUM-226, WHICH IS A MORE COMMON ISOTOPE OF RADIUM AND WHICH WAD DISCOVERED BY THE CURIES, HAS A 1601-YEAR HALF-LIFE.
THE HALF-LIFE OF RADIUM-223 ISOTOPE IS 11.4 DAYS. THE RADIUM-226, WHICH IS A MORE COMMON ISOTOPE OF RADIUM AND WHICH WAD DISCOVERED BY THE CURIES, HAS A 1601-YEAR HALF-LIFE.
Answer: Option A. -> proportional to the square of the orbital wave function
THE PROBABILITY OF FINDING AN ELECTRON AT A POINT WITHIN AN ATOM IS PROPORTIONAL TO THE SQUARE OF THE ORBITAL WAVE FUNCTION I.E., ψ|² AT THAT POINT. |ψ|² IS KNOWN AS PROBABILITY DENSITY AND IS ALWAYS POSITIVE.
THE PROBABILITY OF FINDING AN ELECTRON AT A POINT WITHIN AN ATOM IS PROPORTIONAL TO THE SQUARE OF THE ORBITAL WAVE FUNCTION I.E., ψ|² AT THAT POINT. |ψ|² IS KNOWN AS PROBABILITY DENSITY AND IS ALWAYS POSITIVE.
Answer: Option B. -> 4
IN α-DECAY, THE MASS NUMBER OF THE PRODUCT NUCLEUS (DAUGHTER NUCLEUS) IS FOUR LESS THAN THAT OF THE DECAYING NUCLEUS (PARENT NUCLEUS), WHILE THE ATOMIC NUMBER DECREASES BY TWO.
IN α-DECAY, THE MASS NUMBER OF THE PRODUCT NUCLEUS (DAUGHTER NUCLEUS) IS FOUR LESS THAN THAT OF THE DECAYING NUCLEUS (PARENT NUCLEUS), WHILE THE ATOMIC NUMBER DECREASES BY TWO.
Answer: Option A. -> Decomposition of calcium carbonate to calcium oxide and carbon dioxide
DECOMPOSITION OF CALCIUM CARBONATE TO CALCIUM OXIDE AND CARBON DIOXIDE IS AN ENDOTHERMIC REACTION. RESPIRATION AND BURNING OF NATURAL GAS ARE EXAMPLES OF EXOTHERMIC REACTIONS.
DECOMPOSITION OF CALCIUM CARBONATE TO CALCIUM OXIDE AND CARBON DIOXIDE IS AN ENDOTHERMIC REACTION. RESPIRATION AND BURNING OF NATURAL GAS ARE EXAMPLES OF EXOTHERMIC REACTIONS.
Answer: Option D. -> All of the above
THE REACTION RATE IS CONTROLLED THROUGH CONTROL-RODS MADE OUT OF NEUTRON-ABSORBING MATERIALS. THEY ARE COMPOSED OF CHEMICAL ELEMENTS SUCH AS BORON, SILVER, INDIUM AND CADMIUM THAT ARE CAPABLE OF ABSORBING MANY NEUTRONS WITHOUT THEMSELVES FISSIONING.
THE REACTION RATE IS CONTROLLED THROUGH CONTROL-RODS MADE OUT OF NEUTRON-ABSORBING MATERIALS. THEY ARE COMPOSED OF CHEMICAL ELEMENTS SUCH AS BORON, SILVER, INDIUM AND CADMIUM THAT ARE CAPABLE OF ABSORBING MANY NEUTRONS WITHOUT THEMSELVES FISSIONING.
Answer: Option A. -> Nuclear Fission
THE SOURCE OF ENERGY IN NUCLEAR REACTORS, WHICH PRODUCE ELECTRICITY, IS NUCLEAR FISSION. THE ENORMOUS ENERGY RELEASED IN AN ATOM BOMB COMES FROM UNCONTROLLED NUCLEAR FISSION.
THE SOURCE OF ENERGY IN NUCLEAR REACTORS, WHICH PRODUCE ELECTRICITY, IS NUCLEAR FISSION. THE ENORMOUS ENERGY RELEASED IN AN ATOM BOMB COMES FROM UNCONTROLLED NUCLEAR FISSION.
Answer: Option B. -> Nitrogen
THE CHIPS MANUFACTURERS USUALLY FLUSH BAGS OF CHIPS WITH GAS SUCH AS NITROGEN TO PREVENT THE CHIPS FROM GETTING OXIDISED.
THE CHIPS MANUFACTURERS USUALLY FLUSH BAGS OF CHIPS WITH GAS SUCH AS NITROGEN TO PREVENT THE CHIPS FROM GETTING OXIDISED.
Answer: Option C. -> Chlorine Trifluoride
CHLORINE TRIFLUORIDE HAS 10 ELECTRONS AROUND THE CENTRAL CHLORINE ATOM. THERE ARE FIVE ELECTRON PAIRS ARRANGED IN A TRIGONAL BIPYRAMIDAL SHAPE AND TWO EQUATORIAL LONE PAIRS MAKING THE FINAL STRUCTURE T-SHAPED.
CHLORINE TRIFLUORIDE HAS 10 ELECTRONS AROUND THE CENTRAL CHLORINE ATOM. THERE ARE FIVE ELECTRON PAIRS ARRANGED IN A TRIGONAL BIPYRAMIDAL SHAPE AND TWO EQUATORIAL LONE PAIRS MAKING THE FINAL STRUCTURE T-SHAPED.
Answer: Option A. -> Fe₂O₃. nH₂O
RUSTING IS THE CORROSION OF IRON IN WHICH IRON (FE) COMBINES WITH OXYGEN TO FORM RUST, OR IRON OXIDE. FE₂O₃. NH2O IS USUALLY CALLED AS HYDRATED FERRIC OXIDE.
RUSTING IS THE CORROSION OF IRON IN WHICH IRON (FE) COMBINES WITH OXYGEN TO FORM RUST, OR IRON OXIDE. FE₂O₃. NH2O IS USUALLY CALLED AS HYDRATED FERRIC OXIDE.
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