A particle of mass \(M\) and charge \(Q\) moving with velocity \(v\) describes a circular path of radius \(R\) when subjected to a uniform transverse magnetic field of induction \(B.\) The work done by the field, when the particle completes one full circle, is:
1. \(\frac{Mv^2}{R}2\pi R\)
2. zero
3. \(BQ2^{\pi R}\)
4. \(BQv2^{\pi R}\)
1. \(\frac{Mv^2}{R}2\pi R\)
2. zero
3. \(BQ2^{\pi R}\)
4. \(BQv2^{\pi R}\)
A particle of mass 100 g is thrown vertically upward with a speed of 5 m/s. The work done by the force of gravity during the time the particle goes up is:
1. -0.5J
2. -1.25J
3. 1.25J
4. 0.5J
The relative reactivity’s of acyl compound towards nucleophilic substitution are in the order of:
1. Acyl chloride > acid anhydride > ester > amide
2. Ester > acyl chloride > amide > acid anhydride
3. Acid anhydride > amide > ester > acyl chloride
4. Acyl chloride > ester > acid anhydride > amide
Clemmensen reduction of a ketone is carried out in the presence of which of the following?
1. Zn-Hg with HCl
2. LiAlH4
3. H2 and pt as catalyst
4. Glycol with KOH
In Duma’s method of estimation of nitrogen, 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be: (Aqueous tension at 300 K = 15 mm)
1. 16.45
2. 17.45
3. 14.45
4. 15.45
Which of the following is not correct?
| 1. | Ammonia is used as refrigerant |
| 2. | A mixture of CaC2 and N2 is known as nitrolim |
| 3. | A mixture of Ca(H2PO4)2 and CaSO4.2H2O is known as superphosphate of lime |
| 4. | Hydrolysis of NCl3 gives NH3 and HOCl |
Which one of the following is aromatic?
1. Cyclopentadienyl cation
2. Cyclooctatetraene
3. Cycloheptatriene
4. Cycloheptatrienylcation
The complexes [Co(NH3 )6 ] [Cr(CN)6] and [Cr(NH3 )6 ] [Co(CN)6 ] are the examples of which type of isomerism?
1. Ionization isomerism
2. Coordination isomerism
3. Geometrical isomerism
4. Linkage isomerism
A solution with negative deviation among the following is:
1. ethanol-acetone
2. chlorobenzene-bromobenzene
3. chloroform-acetone
4. benzene-toluene
Which of the following compounds is soluble in benzene but almost insoluble in water?
1.
2.
3.
4.
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