A. 1s2 2s2 2p6 3s2 3p6 3d7
B. 1s2 2s2 2p6 3s2 3p6 4s2 4p5
C. 1s2 2s2 2p6 3s2 3p5 3d10
D. 1s2 2s2 2p6 3s2 3p6 4s23d5
30
Which of the following statement is correct ?
0
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?
A. size of Cl atoms > Cl- ion
B. size of Na+ ion < Na atom
C. size of Na atom < Na+ ion
D. Cl- < Na+
0
Which of the following elements conduct electricity and also melts below 100°C ?
A. Ethylene iodide
B. Ethylene bromide
C. Ethylene chloride
D. Ethylene fluoride
0
Acid present in acid rain may be_________________?
A. Aluminium
B. Sodium
C. Carbon
D. Sulphur
0
The unit of the rate constant (k) is same as that of rate of reaction________________?
A. H2SO4
B. HNO3
C. both A and B
D. none of the above
0
Which of the following elements react with steam to produce H2 gas?
A. First order reaction
B. Second order reaction
C. Zero order reaction
D. Third order reaction
0
Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________?
A. Pd
B. Ni
C. Sn
D. All of the above
0
A solution can be both____________________?
A. 6
B. 8
C. 10
D. 4
0
The unit of molality is__________________?
A. dilute and concentrated
B. dilute and saturated
C. saturated and unsaturated
D. saturated and super saturated
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