Verbal Reasoning - Mental Ability Questions

In the following question, select the related word from the given alternatives.
Mathematics : Formulas : : Chemistry : ?

Sumit wants to get his clothes washed. The laundry service charges in his city are such that for the first kg of clothes, he is charged Rs.150 and after that, he is charged Rs.50 for every kg that follows. If he gets 10kg of clothes washed, how much money does he pay for the laundry service ?

Pointing towards a girl, Rajan said, she is the daughter of my mother's daughter. Then how is the girl related to Rajan?

A and B start from the same point. A cycles 8 km South, then turns to her right and cycles 5 km. B cycles 3 km North, then turns West and cycles 5 km, then turns to her left and cycles 4 km. Where is B with respect to A now?

'Car' is related to 'Garage' in the same way as 'Hen' is related to ___.

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.

1.5, 9/4, 3, ? , 4.5, 21/4

Arrange the given words in the sequence in which they occur in the dictionary.
i. Nuzzled
ii. Nozzle
iii. Nonjury
iv. Nocking

If 19#13=3; 25#3=11; 36#10=13; then what is the value of 7#3=?