Two elements, X and Y are in the same group on the periodic table because…
Two elements, X and Y are in the same group on the periodic table because they both have…
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Which of the following electron configurations represents that of an atom in its ground state?
Which of the following electron configurations represents that of an atom in its ground state? A. 1s 22s12p1…
Which of the following ions has an electron configuration different from the other?
Which of the following ions has an electron configuration different from the other? A.17CI– B.8O2- C.12Mg2+ D.13AI3+ Correct…
Which of the following statements about thermoplastic material is correct? They
Which of the following statements about thermoplastic material is correct? They A. do not melt on heating B.…
The number of orbitals in a p-sub level of an atom is
The number of orbitals in a p-sub level of an atom is A. 2 B. 3 C. 5…
Which of the following statements about fine chemical is correct? It
Which of the following statements about fine chemical is correct? It A. is injurious to health B. has…
Which of the following materials is classified as a non-biodegradable pollutant?
Which of the following materials is classified as a non-biodegradable pollutant? A. Animal hide B. Paper C. Plastic…
The main function of limestone in the blast furnace is to
The main function of limestone in the blast furnace is to A. act as catalyst B. act as…
Which of the following raw materials is used in a plastic industry?
Which of the following raw materials is used in a plastic industry? A. Ethene B. Methane C. Calcium…