The engine of a jet aircraft applies a thrown force of \(10^5\) N during takeoff and causes the plane to attain a velocity of \(1\) km/s in \(10\) s. The mass of the plane is:
1. \(10^2\) kg
2. \(10^3\) kg
3. \(10^4\) kg
4. \(10^5\) kg
1. \(10^2\) kg
2. \(10^3\) kg
3. \(10^4\) kg
4. \(10^5\) kg
1. \(-20\) N
2. \(-0.2\) N
3. \(0.2\) N
4. \(20\) N
1. constant
2. proportional to \(x\)
3. proportional to \(x^2\)
4. inversely proportional to \(x\)
2. \(20\)
3. \(30\)
4. \(40\)
A hollow sphere of volume \(V\) is floating on water surface with half immersed in it. What should be the minimum volume of water poured inside the sphere so that the sphere now sinks into the water?
1. \(\frac V2\)
2. \(\frac V3\)
3. \(\frac V4\)
4. \(V\)
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. \(n=3,l=0,m=0,s=+\frac12\)
\(CH_3COOH\xrightarrow{~~~Br_2/P~~~}~Y~\xrightarrow[(ii)~H_3O^+~~]{(i)~KCN}~X\)Here, \(X\) is:
1. glycolic acid
2. a-hydroxy propionic acid
3. succinic acid
4. malonic acid
2. acetyl chloride
3. Cone. Hp0 4
4. zinc dust
For the homogeneous reaction,
The equilibrium constant K, has the units:
1. Conc.+10
2. Conc.+1
3. Conc.-1
4. It is dimensionless
\(NH_3+OCl^-~\longrightarrow~N_2H_4+Cl^-\)Occurring in basic medium, the coefficient of N 2H4 in the balanced equation will be:
1. 1
2. 2
3. 3
4. 4
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