Explanation:
An agreement for the sale of goods which provides that the property would pass on the buyer on full payment of price and execution of sale deed is known as an agreement to sell. It is a contract between the buyer and seller, where the seller agrees to sell the goods to the buyer on certain terms and conditions. The buyer agrees to purchase the goods on those terms and conditions.

Features of an agreement to sell:
An agreement to sell has the following features:

1. Pending transfer of ownership: In an agreement to sell, the ownership of the goods is not transferred to the buyer immediately. It is done only after the full payment of the price and execution of the sale deed.

2. Future date: An agreement to sell is executed for a future date. The actual sale takes place on that date.

3. Unilateral: It is a unilateral contract where only the seller is bound to sell the goods. The buyer has the option to purchase the goods or not.

4. No title: The seller does not transfer the title of the goods to the buyer until the full payment of the price is made.

5. Risk: The risk of loss or damage to the goods remains with the seller until the ownership is transferred to the buyer.

Advantages of an agreement to sell:
1. It allows the seller to retain the ownership of the goods until the full payment is made.

2. The buyer has the option to purchase the goods or not, as it is a unilateral contract.

3. The seller can avoid the risk of loss or damage to the goods until the ownership is transferred to the buyer.

Disadvantages of an agreement to sell:
1. The buyer may change his mind about purchasing the goods, which may affect the seller's business.

2. The seller cannot transfer the ownership of the goods to the buyer until the full payment is made, which may cause delay in the delivery of goods.

3. The seller may have to bear the risk of loss or damage to the goods until the ownership is transferred to the buyer.

Thus, an agreement to sell is a contract between the buyer and the seller, where the seller agrees to sell the goods to the buyer on certain terms and conditions. The actual sale takes place on a future date after the full payment of the price and execution of the sale deed.