Physics-
General
Easy
Question
A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 metres is :
- 56 sec
- 68 sec
- 80 sec
- 92 sec
The correct answer is: 80 sec
Related Questions to study
Physics-
Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first :
Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first :
Physics-General
Physics-
A ball is rolled off the edge of horizontal table at a speed of 4m/sec. It hits the ground after 0.4 second. Which statement given below is true :
A ball is rolled off the edge of horizontal table at a speed of 4m/sec. It hits the ground after 0.4 second. Which statement given below is true :
Physics-General
Physics-
Speed of a body on reaching the point from which it was projected upwards, is :
Speed of a body on reaching the point from which it was projected upwards, is :
Physics-General
Physics-
A bullet is fired from a cannon with velocity 500 m/s. If the angle of projection is 15
and g = 10 m/s2 Then the range is :
A bullet is fired from a cannon with velocity 500 m/s. If the angle of projection is 15 and g = 10 m/s2 Then the range is :
Physics-General
Chemistry-
The typical reaction of benzene and other aromatic compounds are electrophilic substitution. Presence of electron donating group activates the ring towards electrophilic substitution, while presence of electron withdrawing group deactivates the ring towards electrophilic substitution but at the same time activates the ring towards nucleophilic substitution. Some groups are predominantly meta-directing and all of these are deactivating. Except halogen, most of the O– and P– directing groups are activating groups.
Which of the following compound is not formed.
X represents mixture of organic compounds. The mixture does not contain.
The typical reaction of benzene and other aromatic compounds are electrophilic substitution. Presence of electron donating group activates the ring towards electrophilic substitution, while presence of electron withdrawing group deactivates the ring towards electrophilic substitution but at the same time activates the ring towards nucleophilic substitution. Some groups are predominantly meta-directing and all of these are deactivating. Except halogen, most of the O– and P– directing groups are activating groups.
Which of the following compound is not formed.
X represents mixture of organic compounds. The mixture does not contain.
Chemistry-General
Chemistry-
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species.
When a Meta-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho to the meta directing group rather than para.
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species.
When a Meta-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho to the meta directing group rather than para.
Chemistry-General
Chemistry-
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species.
When a Meta-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho to the meta directing group rather than para.
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species.
When a Meta-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho to the meta directing group rather than para.
Chemistry-General
Chemistry-
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species.
When a Meta-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho to the meta directing group rather than para.
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species.
When a Meta-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho to the meta directing group rather than para.
Chemistry-General
Chemistry-
Benzene is converted to toluene by :
Benzene is converted to toluene by :
Chemistry-General
Chemistry-
Identify Y in the change;
Identify Y in the change;
Chemistry-General
Chemistry-
The correct order of reactivity towards electrophilic substitution is
The correct order of reactivity towards electrophilic substitution is
Chemistry-General
Chemistry-
B basicity order of following heterocycles are
1) 
2) 
3) 
4) 
B basicity order of following heterocycles are
1)
2)
3)
4)
Chemistry-General
Chemistry-
Arrange the following in increasing order of electrophilic aromatic substitution.
I) 
II) 
III) 
IV) 
Arrange the following in increasing order of electrophilic aromatic substitution.
I)
II)
III)
IV)
Chemistry-General
Chemistry-
The order of the basicity in the following compounds is
I) 
II) 
III) 
IV) 
The order of the basicity in the following compounds is
I)
II)
III)
IV)
Chemistry-General
Chemistry-
Xylene on treatment with Br2/FeBr3 give only one product. Xylene was
Xylene on treatment with Br2/FeBr3 give only one product. Xylene was
Chemistry-General
