Chemistry Test ...

Which of the following pairs of atomic numbers represent elements belonging to the same group:

Which of the following contains the same number of atoms as \(20 \mathrm{~g}\) of calcium \(\mathrm{Ca}\)?

Study the following statements about the stereochemistry of steroidal aglycones in cardiac glycosides:

[P]: Rings A-B and C-D are cis fused while B-C is trans fused.

[Q]: Rings A-B and C-D are trans fused while B-C is cis fused.

[R]: Rings A-B are trans fused while B-C and C-D are els fused.

[S]: Rings A-B are cis fused while B-C and C-D are trans fused.

Choose the correct statement.

\(C H_{3}-I+2 N a+I-C H_{3} \stackrel{\text { dry ether }}{\longrightarrow}\) ____________.

The phenomenon in which polar crystals on heating produce electricity is called:

Two electrons occupying the same orbital are distinguished by:

Which of the following statements is not true about classical smog?

The pair having the same magnetic moment is:

[At. No.: \(Cr =24, Mn =25, Fe =26, Co =27]\)

Identify the product A in the following reaction:

The pH of a 0.02M \(\mathrm{NH}_4 \mathrm{Cl}\) solution will be: