Pollutants have adverse effect over_________________?

A. Biosphere
B. Ecosystem
C. Both a & b
D. Hydrosphere

Which of the following air pollutants is more dangerous for ozone layer ?
A. CFC B. CO2 C. CO D. Oxides of nitrogen...
Greater shielding effect corresponds to ionization energy value___________________?
A. Greater B. Lesser C. Remain same D. No effect...
Shielding effect across the period ________________?
A. Increases B. Decreases C. Constant D. None...
Shielding effect across the period_________________?
A. Increases B. Decreases C. Can not be predicted D. Remains constant...
Which of the following shows inert pair effect ?
A. boron B. carbon C. silicon D. tin...
Which of the following orbitals has maximum penetration effect?
A. S B. P C. d D. f Submitted by: Muhammad Ali Kunbhar...
The shielding Effect across the period __________?
A. Increases B. Decreases C. Remains Same D. None of them Submitted by: Aamir khan Hullio...
Electromeric effect is ____________?
A. Permanent effect B. Operate due to electronegativity difference C. temporary effect D. None of the above Submitted by: Aneela shabbir...
Residence time of methane in the atmosphere is___________________?
A. 3 – 7 days B. 2 -3 days C. 3 – 7 years D. 2 – 3 years...
The main product of bacterial action is_________________?
A. Nox B. NO2 C. N2O3 D. NO...