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Crystal System and Bravais Lattice

If edge lengt...

Question

If edge lengths are a ≠ b ≠ c and axial angles are α = β = γ = 90°, then the crystal system is called

यदि कोर लम्बाईयां a ≠ b ≠ c हैं तथा अक्षीय कोण α = β = γ = 90° हैं, तो क्रिस्टल निकाय कहलाता है

A

Tetragonal

द्विसमलम्बाक्ष

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B

Orthorhombic

विषमलम्बाक्ष

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C

Hexagonal

षट्कोणीय

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D

Monoclinic

एकनताक्ष

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Solution

The correct option is B Orthorhombic

विषमलम्बाक्ष
Solution

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Similar questions

Q. The crystal system having edge length a = b = c and axial angles, α = β = γ ≠ 90°, is

कोर लम्बाई a = b = c तथा अक्षीय कोण, α = β = γ ≠ 90° वाला क्रिस्टल निकाय है

Q. This section contains 1 Assertion-Reason type question, which has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
इस खण्ड में 1 कथन-कारण प्रकार का प्रश्न है, जिसमें 4 विकल्प (a), (b), (c) तथा (d) दिये गये हैं, जिनमें से केवल एक सही है।

A : If the supplement of an angle is four times of its complement angle, then the sum of three times of its complement with two times of its supplement angle is 330°.
A : यदि एक कोण का संपूरक कोण इसके पूरक कोण का चार गुना है, तब इसके पूरक के तीन गुना तथा इसके संपूरक के दो गुना का योगफल 330° है।

R : Two angles are called complementary angles if their sum is 90° and two angles are called supplementary angles if their sum is 180°.
R : दो कोण पूरक कोण कहलाते हैं यदि उनका योगफल 90° है तथा दो कोण संपूरक कोण कहलाते हैं यदि उनका योगफल 180° है।

a, b, c

represent cell dimensions and

α, β, γ

represents crystal angles then, the crystal system

a \neq b \neq c, α = γ = 90^{\circ}, β \neq 90^{\circ}

Q. This section contains 1 Assertion-Reason type question, which has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
इस खण्ड में 1 कथन-कारण प्रकार का प्रश्न है, जिसमें 4 विकल्प (a), (b), (c) तथा (d) दिये गये हैं, जिनमें से केवल एक सही है।

A : The angles between south and east and south and west are supplementary angles.

A : दक्षिण एवं पूर्व और दक्षिण एवं पश्चिम के मध्य कोण संपूरक कोण हैं।

R : When the sum of the measures of two angles is 90°, the angles are called complementary angles.

R : जब दो कोणों के माप का योगफल 90° है, तब कोण पूरक कोण कहलाते हैं।

Q. for a certain crystal system the relation between edge lengths (a, b, and c) is
a = b = c
The relation between axial angles

(α, β and γ)

α = β = γ

The pair of crystal system for which above relation holds true is:

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