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Sky and Space

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Question

A star appears slightly higher than its actual position in the sky due to the phenomenon of

आकाश में एक तारा किस परिघटना के कारण अपनी वास्तविक स्थिति से थोड़ा ऊपर दिखाई देता है?

A

Atmospheric refraction

वायुमण्डलीय अपवर्तन

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B

Scattering of light

प्रकाश के प्रकीर्णन

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C

Dispersion of light

प्रकाश के विक्षेपण

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D

Tyndall effect

टिण्डल प्रभाव

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Solution

The correct option is A Atmospheric refraction

वायुमण्डलीय अपवर्तन
Solution

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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 sky appears blue due to atmospheric refraction.
A : वायुमण्डलीय अपवर्तन के कारण आकाश का रंग नीला दिखाई देता है।

R : The sky appears dark instead of blue to an astronaut in space.
R : अन्तरिक्ष में अन्तरिक्षयात्री को आकाश नीले की बजाय काला दिखाई देता है।

Q. To an astronaut in outer space, the sky appears

बाह्य अन्तरिक्ष में एक अन्तरिक्षयात्री को, आकाश दिखाई देता है

The correct statement with regard to $H_{2}^{+}$ & $H_{2}^{-}$ is

Q. Assertion :Compressibility factor '

Z

H_{2}

C O_{2}

C O_{2}

has higher molar mass than

H_{2}

.

Q. I: The boiling point of

H_{2} O

is higher than the boiling point of

H_{2} S

H_{2} S

has a greater molecular mass than

H_{2} O

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