Which one of the following sets of quantum numbers represents the highest energy level in an atom?
1. \(n=4,l=0,m=0,s=+\frac12\)
2. \(n=3,l=1,m=1,s=+\frac12\)
3. \(n=3,l=2,m=-2,s=+\frac12\)
4. \(n=3,l=0,m=0,s=+\frac12\)
1. \(n=4,l=0,m=0,s=+\frac12\)
2. \(n=3,l=1,m=1,s=+\frac12\)
3. \(n=3,l=2,m=-2,s=+\frac12\)
4. \(n=3,l=0,m=0,s=+\frac12\)
Subtopic: Shell & Subshell |
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From NCERT
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\(CH_3COOH\xrightarrow{~~~Br_2/P~~~}~Y~\xrightarrow[(ii)~H_3O^+~~]{(i)~KCN}~X\)Here, \(X\) is:
1. glycolic acid
2. a-hydroxy propionic acid
3. succinic acid
4. malonic acid
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Acetic anhydride is prepared in the laboratory by heating sodium acetate with:
1. Ethyl chloride
2. acetyl chloride
3. Cone. Hp0 4
4. zinc dust
2. acetyl chloride
3. Cone. Hp0 4
4. zinc dust
60%
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For the homogeneous reaction,
The equilibrium constant K, has the units:
1. Conc.+10
2. Conc.+1
3. Conc.-1
4. It is dimensionless
62%
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For the reaction,
\(NH_3+OCl^-~\longrightarrow~N_2H_4+Cl^-\)
Occurring in basic medium, the coefficient of N 2H4 in the balanced equation will be:
1. 1
2. 2
3. 3
4. 4
\(NH_3+OCl^-~\longrightarrow~N_2H_4+Cl^-\)Occurring in basic medium, the coefficient of N 2H4 in the balanced equation will be:
1. 1
2. 2
3. 3
4. 4
59%
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Which of the following would exert maximum osmotic pressure?
| 1. | Decinormal aluminium sulphate |
| 2. | Decinormal barium chloride |
| 3. | Decinormal sodium chloride |
| 4. | A solution obtained by mixing equal volumes of (2) and (3) and filtering |
59%
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64%
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57%
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