Which of these arrangement of elements is in order of increasing ionization energy?
A. Boron, Carbon, Flourine, Nitrogen B. Boron, Carbon, Nitrogen, Flourine C. Carbon, Boron, Nitrogen, Flourine D. Flourine, Nitrogen, Carbon, Boron E. Nitrogen, Flourine, Carbon, Boron Correct Answer: Option B – Boron, Carbon, Nitrogen,...
An element Z has a combining power of 3. Which of the following formulae is correct of its compound?
A. ZS3 B. ZSO3 C. ZSO4 D. ZO3 E. Z3Cl2 Correct Answer: Option D – ZO3
Bauxite is the ore of?
A. aluminium B. calcium C. Iron D. sodium E. magnesium Correct Answer: Option A – aluminium
Matter is neither created nor destroyed in the course of any chemical reactions is a statement of the law of?
A. combining volumes B. conservation of mass C. definite proportion D. multiple proportions E. reciprocal proportion. Correct Answer: Option B – conservation of mass
pH is define as?
A. [H+] B. –log [H] C. –log [H+] D. log [H] E. log [H+] Correct Answer: Option C = –log [H+]Products
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