The question relates to the characteristics of crystal systems, specifically focusing on cubic crystals. To determine the correct relations, let's review the properties of cubic crystals:
- Cubic Crystal System: A cubic crystal is characterized by the following properties:
- The length of the unit cell edges is equal: a = b = c.
- The angles between the edges are all right angles: \alpha = \beta = \gamma = 90^{\circ}.
- Examining the Options:
- Option A: a = b \neq c is incorrect for cubic systems, as all edge lengths should be equal.
- Option B: a = b = c matches the property of cubic crystals that the unit cell edges are equal.
- Option C: \alpha = \beta = \gamma = 90^{\circ} is correct, as all angles in a cubic crystal are 90 degrees.
- Option D: \alpha \neq \beta = \gamma = 90^{\circ} is incorrect as it contradicts the property of equal angles (90 degrees) for cubic crystals.
Therefore, the correct properties of a cubic crystal are reflected in Options B and C, making the correct answer B and C only.
Important Questions from Chemistry (CUET PG) Mixed
The final product (P) is
Consider the following statements with respect to citral
(A). Geranial and Neral are geometrical isomers of citral.
(B). It forms geranic acid on heating with potassium hydrogen sulphate.
(C). It gives 6-methylhept-5-en-2-one on treating with potassium carbonate.
(D). On oxidation with silver oxide it yields Laevulic acid.
Choose the correct answer from the options given below:Which correct sequence of reactions are applied to achieve the following transformation?
Above conversion is carried out using
The final product (D) in the above conversion is
