SPSC CCE GSA SOLVED MCQS PAPER HELD 16-06-2023
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
صاف آسمان کے نیلے رنگ کی وجہ کیا ہے؟
Reflection of light
Refraction of light
Diffraction of light
sSattering of light
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Explanation
The blue colour of the sky is due to the scattering of light by the atmospheric particles.
Light of shorter wavelengths scatters more than the light of longer wavelengths and
the violet colour has a shorter wavelength , but our eyes are more sensitive to blue light. Hence, the colour of a clear sky is blue.
کار ڈرائیور کی حفاظت کے لیے استعمال ہونے والے ایئر بیگ میں کیا ہوتا ہے؟
Sodium Bicarbonate
Sodium Azide
Sodium Nitrite
Sodium Peroxide
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Explanation
The driver-side airbag is a container containing about 50 grams of sodium azide.
The passenger side container holds about 200 grams of sodium azide.
زنگ کے بھورے رنگ کی کیا وجہ ہے؟
Reduction
Oxidation
Both A & B
None of these
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Explanation
Rust is iron oxide , which forms when iron or an alloy that contains iron is exposed to oxygen and moisture for a long time
انسانی جسم میں کونسا بلڈ گروپ نایاب ہے؟
AB positive
AB Negative
O Negative
None of these
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Explanation
AB negative is the rarest of the eight main blood types
A universal donor has the blood group is " O "
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The rarest blood types are:
B negative(B -ve) , which is found in 1.5 percent of the total population.
AB negative(AB -ve) , which is found in 0.6 percent of the total population.
AB positive(AB +ve), which is found in 3.4 percent of the total population.
مادے کی خاصیت کی وجہ سے تیل کے چراغ کی بتی میں تیل اٹھتا ہے، اسے کیا کہا جاتا ہے۔
Capillary action
Condensation
Respiration
None of these
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Explanation
The oil in the wick of an oil lamp rises up due to capillary action.
This effect is due to surface tension of liquids.
The wick here acts as a capillary tube
The center of the earth
The Equator
The South Pole
The north pole
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Explanation
The weight of an object is minimum when it is placed at the center of the earth because when an object is in the center, experiences gravitational pull from all directions & the weight of an object maximum on earth is on the poles
آواز کی رفتار سب سے تیز کہاں ہے؟
Liquids
Solids
Gases
Vacuum
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Explanation
Solids are packed together tighter than liquids and gases, hence sound travels fastest in solids
Sound can not travel through vaccum
پوٹاشیم پرمینگیٹ پانی کو صاف کرنے کے لیے کس وجہ سے استعمال ہوتا ہے؟
It is a sterlizing agent
It dissolves the impurities of water
It is a reducing agent
It is an oxidizing agent
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Explanation
Potassium permanganate is an inorganic chemical compound and it is a strong oxidizing agent
