NextMockপরীক্ষা খুঁজুন, যেমন SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · প্রশ্ন 99

With reference to 'noble metals', consider the following: 1. Noble metals are found in nature in a pure (native) state. 2. Uranium and lead are examples of noble metals. Which of the above is/are correct?

  1. 2 only
  2. Both 1 and 2
  3. Brass is also a noble metal
  4. 1 only
  5. None of the above / More than one of the above
উত্তর দেখান ও ব্যাখ্যা

উত্তর: (D) 1 only

ব্যাখ্যা

Noble metals resist corrosion and oxidation and often occur native (gold, platinum).

  • (A) ভুল

    Wrong: uranium and lead are not noble metals.

  • (B) ভুল

    Wrong: statement 2 is wrong.

  • (C) ভুল

    Wrong: brass is an alloy.

  • (D) সঠিক

    Correct: noble metals (gold, platinum, silver) occur native; uranium/lead do not qualify.

  • (E) ভুল

    Wrong: only one of the options A–D is correct.