Class 12th

The correct options for the products A and B of the following reactions are

A college stores data on students, showing their gender and performance, on a computer disc. Due to virus, some of the data is lost and only the following could be recovered.

Study the table carefully and answer the questions given below it.

However, an expert committee arrived at the following conclusions

I.     One-third of the male students were 'average'.

II.   40% of the students were female.

III.  Half the total numbers of students were 'excellent'.

The number of female 'good' students is

Directions for questions: Answer the questions on the basis of the information given below.

A college stores data on students, showing their gender and performance, on a computer disc. Due to virus, some of the data is lost and only the following could be recovered.

Study the table carefully and answer the questions given below it.

However, an expert committee arrived at the following conclusions

I.     One-third of the male students were 'average'.

II.   40% of the students were female.

III.  Half the total numbers of students were 'excellent'.

The number of male 'good' students is

The polymer formed on heating Novolac with formaldehyde is:

Mr. John has 5 children & he gives different pocket money to all of his 5 children to do 5 particular tasks viz. going for morning walk, Exercise, Completing their home work, Drinking Milk and Assisting in family work. A particular child can do only one task at a time and each task can be assigned to one child only. (The values are in $)

If all the children increase the pocket money demanded by them for the tasks, then what will be the least amount for doing the task, keeping in mind that children 1, 2, 3, 4 and 5 increased the amount for the task by 50%?

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Heavy water is used for the study of reaction mechanism.

Reason (R): The rate of reaction for the cleavage of O-H bond is slower than that of O-D bond.

Choose the most appropriate answer from the options given below:

Mr. John has 5 children & he gives different pocket money to all of his 5 children to do 5 particular tasks viz. going for morning walk, Exercise, Completing their home work, Drinking Milk and Assisting in family work. A particular child can do only one task at a time and each task can be assigned to one child only. (The values are in $)

If Mr. John has to choose 2 children to do all the work, where the first child will do the first 2 works and the remaining 3 works will be done by the other child. Then which two children will Mr. John choose so that he has to pay the least amount?

Mr. John has 5 children & he gives different pocket money to all of his 5 children to do 5 particular tasks viz. going for morning walk, Exercise, Completing their home work, Drinking Milk and Assisting in family work. A particular child can do only one task at a time and each task can be assigned to one child only. (The values are in $)

If no two children can work simultaneously so that each task is done one after than the other, then at most what amount will be the given to get all the tasks done? 

Indicate the complex / complex ion which did not show any geometrical isomerism:

Directions for questions: Answer the questions on the basis of the information given below.

Mr. John has 5 children & he gives different pocket money to all of his 5 children to do 5 particular tasks viz. going for morning walk, Exercise, Completing their home work, Drinking Milk and Assisting in family work. A particular child can do only one task at a time and each task can be assigned to one child only. (The values are in $)

If no two children can work simultaneously so that each task is done one after than the other, then what will be the least amount a parent has to give to all the tasks done?