NDA Government Jobs Exams

In KMnO4 molecule, the oxidation states of the elements Potassium (K), Manganese (Mn) and Oxygen (O)
are respectively
(A) + 1, + 5, – 2 (B) + 1, + 7, – 2 (C) 0, 0, 0 (D) + 1, + 7, 0

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NDA Other Question

Given below is a approximate composition of a substance :
CaO 60-70%
SiO2 20-25%
Al2O2 5-10%
Fe2O3 2-3%
The substance is
(A) Plaster of paris (B) Cement (C) Marble stone (D) Quartz Which of the following statements is/are correct ?
1. Inter-Tropical Convergence Zone is a low pressure belt which forms an important zone of contact
over Northern India and Pakistan
2. Inter-Tropical convergence Zone invites inflow of winds from different directions.
Select the correct answer using the code given below :
(A) 1 only (B) 2 only (C) Both 1 and 2 (D) Neither 1 nor 2