Which of the following elements react with steam to produce H2 gas?
Which of the following elements react with steam to produce H2 gas?
A. Pd
B. Ni
C. Sn
D. All of the above
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Pi bonds are produced by overlapping of__________________?
Pi bonds are produced by overlapg of__________________?A. Un-hybrid orbitals
B. Hybrid orbitals
C. Hybrid and un hybrid orbitals
D. atomic orbital and hybrid orbitalWhich of the following is not a use of formaldehyde ?
Which of the following is not a use of formaldehyde ?A. in silvery mirror
B. in making medicine urotroe
C. in making throat lozenges
D. in making acetic acidThe number of moles of CO2 which contains 16 g of oxygen is__________________?
The number of moles of CO2 which contains 16 g of oxygen is__________________?A. 0.25
B. 0.5
C. 0.75
D. 1Which of the following unit of concentration is independent of temperature ?
Which of the following unit of concentration is independent of temperature ?A. Molarity
B. Molality
C. Mole fraction
D. allCO2 is gas while SiO2 is solid at room temperature?
CO2 is gas while SiO2 is solid at room temperature?A. carbon is non-metal while silicon is semi-metal
B. CO2 is an independent molecule while SiO2 has network covalent structure
C. CO2 forms multiple bond while silicon does not form multiple bonds
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Which one is natron ?A. Na2CO3
B. Na2CO3.10H2O
C. Na2CO3.H2O
D. NaHCO3