Question

2. Match the following<br />Match the items given in column I suitably with those given in column II. (2<br />Column I<br />Column II<br />1. Fluid friction<br />(a) Due to friction<br />2. Lubricants<br />(b) Streamlined<br />3. Wheels<br />(c) Increases friction<br />4. Spring balance<br />(d) Drag<br />5. Shape of aeroplane (e) Rolling friction<br />6. Rough surface<br />(Reduce friction<br />7. Heat generation<br />(g) Measures force​

Answer 1

Answer:

Explanation:

(A-4), (B-5), (C-2), (D-1)

A) Hydrogen bond → HF

B) Resonance →O3

C) Ionic bond →Lif

D) Covalent solid → C