મુખ્ય સામગ્રી પર જાઓ

State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · પ્રશ્ન 96

Which of the following is called 'quicklime'?

CaCO₃
Ca(OH)₂
CaCl₂
CaO
None of the above / More than one of the above

જવાબ બતાવો અને સમજૂતી

જવાબ: (D) CaO

સમજૂતી

Heating limestone gives quicklime (CaO); adding water gives slaked lime Ca(OH)₂.

(A) ખોટો
Wrong: limestone.
(B) ખોટો
Wrong: slaked lime.
(C) ખોટો
Wrong: calcium chloride.
(D) સાચો
Correct: calcium oxide is quicklime.
(E) ખોટો
Wrong: only one of the options A–D is correct.