The O-O linkage is present in__________?
The O-O linkage is present in__________?
A. H2S2O3
B.H2SO8
C. H2S4O6
D. H2 S2 O6
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Addition of CH3COOH and CH3COONa gives in water_______________?
Addition of CH3COOH and CH3COONa gives in water_______________?A. Standard solution
B. buffer solution
C. acidic buffer solution
D. both B & CWhich one of the following is the correct sequence according to atomic weights?
Which one of the following is the correct sequence according to atomic weights?A. Fe>Co> Ni
B. Co > Ni > Fe
C. Ni> Co> Fe
D. Co >Fe>NiWhich of the following is the formula of chrome red ?
Which of the following is the formula of chrome red ?A. Pb3 O4
B. 2Pb CO3 – Pb (OH)2
C. Pb Cr O4 – Pb (OH)2
D. Pb2OWhen water freezes at 0°C its density decreases due to_______________?
When water freezes at 0°C its density decreases due to_______________?A. Change of bond angles
B. Cubic structure of ice
C. Empty space present in the structure of ice
D. Change of bond lengthResidence time of methane in the atmosphere is___________________?
Residence time of methane in the atmosphere is___________________?A. 3 – 7 days
B. 2 -3 days
C. 3 – 7 years
D. 2 – 3 yearsPhenol was isolated by Runge from________________?
Phenol was isolated by Runge from________________?A. vegetable oil
B. coaltar
C. wood
D. none of these