Last seen: Dec 29, 2021
Correct answer: (b) Either zygote or early embryo upto 8 cell stage
Correct answer: (b) December 1
Correct answer: (d) AIDS, genital herpes, hepatitis B
Correct answer: (d) all of these
Correct answer: (d) all of these
Correct answer: (d) all of these
Correct answer: (a) MnO4- → Mn2+ Explanation: O.N. of Mn in MnO4- is +7 and in Mn2+ it is +2. The difference is of 5 electrons.
Correct answer: (a) standard reduction potential of that species Explanation: More is ERP° more is the tendency to get itself reduced or more is o...
Correct answer: (d) NaNO2 Explanation: In Na2O, SnCl2 and Na2O2 central atom is either in lowest or highest oxidation state, so they can function ...
Correct answer: (d) Cr Explanation: 2I- → I2 is oxidation (loss of electrons) ; Cr (+6) changes to Cr (+3) by gain of electrons. Hence Cr is reduc...
Correct answer: (d) (iii) and (iv) Explanation: In (i) and (ii) both P and S are in highest oxidation state. In (iii) and (iv) ; P has oxidation s...
Correct answer: (c) 2, 1, 1 Explanation: The balanced equation : 2NH3 + OCl- → N2H4 + Cl- + H2O
Correct answer: (d) Al < Fe2+ < Br- Explanation: Reducing character decreases down the series. Hence the correct order is Al < Fe2+ < ...
Correct answer: (a) Syphilis, gonorrhoea, chancroid
Correct answer: (c) HIV is a pathogen whereas others are diseases.
Correct answer: (b) Irreversible
Correct answer: (d) All of these
Correct answer: (d) to practice and implement family planning
Correct answer: (d) All of these
Correct answer: (a) Natality and immigration