SAAT (English)

Chemistry: sample 12

These questions are ETEC/Qiyas's own officially published trial-exam questions, shown here with attribution. They are not sold and are not part of Smart Advanced Network for Education, Development & Achievement's original question bank.

Directions

Read the following questions. Choose the right answer.

There is only ONE correct answer to each question.

According to the Lewis theory of acids and bases, which of the following is a base?

H⁺
NH₃
BF₃
AlCl₃

Show answer

Correct answer: B. NH₃

Why

A Lewis base donates an electron pair; NH₃ has a lone pair on nitrogen it can donate, making it a Lewis base (H⁺, BF₃, and AlCl₃ are all electron-pair acceptors, i.e. Lewis acids).

Source: The Standardized Academic Achievement Test (SAAT) for the Science Track Trial Test (ETEC official) Open the official document

Want to try questions under time? Take the free preview.

Start the free preview