Chemistry-
General
Easy
Question
Consider the following reactions:
Which of the following are stereospecific reactions?
- (I), (II)
- (I), (II),(III)
- (III), (IV), (V)
- All
The correct answer is: All
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Chemistry-
In elimination reaction, the major product is either Saytzeff (more-substituted alkene) or Hofmann product (less-substituted alkene) depending on the nature of the substrate and the nature of the base
Which statement is correct about the reactions?
In elimination reaction, the major product is either Saytzeff (more-substituted alkene) or Hofmann product (less-substituted alkene) depending on the nature of the substrate and the nature of the base
Which statement is correct about the reactions?
Chemistry-General
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Which statement is wrong in the formation of (B) from (A)
Which statement is wrong in the formation of (B) from (A)
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The rate of 
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In both cases, a new bond is formed. If a new bond is formed between the anion and proton, the species acts as a base. If a new bond is formed between the anion and C atom, the species acts as nucleophile
Which of the following statements is wrong?
The rate of reaction depends on the effectiveness of the nucleophile in ejecting the leaving group. Nucleophilicity is the affinity for C atom, while basicity is the affinity for proton
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Which of the following statements is wrong?
Chemistry-General
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Statement 1:Addition of bromine to 
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Statement 2:Bromine addition to an alkene is an electrophilic addition
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Statement 2:Bromine addition to an alkene is an electrophilic addition
Chemistry-General
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Microwaves from a transmitter are directed normally towards a plane reflector. A detector moves along the normal to the reflector. Between positions of 14 successive maxima, the detector travels a distance 0.14 m. If the velocity of light is 3 
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Radio waves coming at 
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) (Assume phase changes by 
after reflection)
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Physics-General
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Equation of a stationary and a travelling waves are as follows y1 = a sin kx cos 
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Earthquakes generate sound waves inside Earth. Unlike a gas, Earth can experience both transverse (S) and longitudinal (P) sound waves. Typically, the speed of S waves is about 4 km/s. A seismograph records P and S waves from an earthquake. The first P waves arrive 3.0 min before the first S wave (figure). Assuming the waves travel in a straight line, how far away does the earthquake occur ? (Yearth = 12.8 1010 pa, rearth = 2000 kg/m3 )
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Physics-General
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S1 and S2 are two coherent sources of sound separated by distance 100.25 , where is the wave length of sound. S1 leads S2 in phase by /4. A and B are two points on the line joining S1 and S2 as shown in figure. The ratio of amplitudes of source S1 and S2 are in ratio 1:2. The ratio of intensity at A to that of B 
is
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Physics-General
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A wall is moving with velocity u and a source of sound moves with velocity u/2 in the same direction as shown in the figure. Assuming that the sound travels with velocity 10u. The ratio of incident sound wavelength on the wall to the reflected sound wavelength by the wall, is equal to
A wall is moving with velocity u and a source of sound moves with velocity u/2 in the same direction as shown in the figure. Assuming that the sound travels with velocity 10u. The ratio of incident sound wavelength on the wall to the reflected sound wavelength by the wall, is equal to
Physics-General
