चिकित्सा शिक्षा आयोग (CEE) पारामेडिकल (B.Pharm, BPH, BMLT, BMIT, B.Optom) तयारी
चिकित्सा शिक्षा आयोग (CEE) – पारामेडिकल (B.Pharm, BPH, BMLT, BMIT, B.Optom)
Paramedical Bachelor Entrance · Medical Education Commission – CEE
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MBBS/BDS/Nursing प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
-
Filament electric bulbs are filled with argon rather than air because argon:
सही उत्तर: ग) is chemically inert and prevents oxidation of the hot filament
Argon does not react with the white-hot tungsten filament, so the filament does not oxidise and lasts longer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Carborundum, which is very hard and used as an abrasive, is:
सही उत्तर: क) silicon carbide (SiC)
Carborundum is SiC, a covalent network solid nearly as hard as diamond, used for grinding and cutting.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Nessler's reagent (alkaline K₂HgI₄) gives a brown precipitate or colour with:
सही उत्तर: क) ammonia or ammonium ions
Nessler's reagent reacts with NH₃ (from NH₄⁺ in alkali) to give a brown precipitate (iodide of Millon's base); it is used to detect ammonia in water.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Among the carbonates of group 2, the one with the highest thermal stability is:
सही उत्तर: ख) BaCO₃
Larger cations polarise the carbonate ion less, so decomposition temperature rises down the group; BaCO₃ is the most stable.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Among the hydroxides of the alkaline earth metals, the one most soluble in water is:
सही उत्तर: ग) Ba(OH)₂
Solubility of group 2 hydroxides increases down the group because lattice energy falls faster than hydration energy; Ba(OH)₂ is the most soluble.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The approximate strength of '20 volume' hydrogen peroxide solution in grams of H₂O₂ per 100 mL is:
सही उत्तर: घ) 6.1 g
1 L gives 20 L O₂ at STP = 20/22.4 mol O₂, from 2 × 20/22.4 = 1.79 mol H₂O₂ = 60.7 g/L, i.e. about 6.1 g per 100 mL.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In the electrolytic refining of copper, the impure copper is made the:
सही उत्तर: ख) anode
Impure copper is the anode and dissolves as Cu²⁺; pure copper deposits on the thin pure-copper cathode, and impurities collect as anode mud.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The van Arkel (iodide) method is used for obtaining ultrapure:
सही उत्तर: ख) zirconium and titanium
Impure Zr or Ti is heated with iodine to form a volatile iodide, which is decomposed on a hot tungsten filament to deposit the pure metal.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The number of unpaired electrons in the low-spin complex ion [Fe(CN)₆]³⁻ is:
सही उत्तर: क) 1
Fe³⁺ is d⁵; CN⁻ is a strong-field ligand, so all five electrons go into the t₂g set (t₂g⁵), leaving one unpaired electron.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The number of geometrical isomers of the octahedral complex [Co(NH₃)₃Cl₃] is:
सही उत्तर: क) 2
An MA₃B₃ octahedral complex exists as two geometrical isomers: facial (fac) and meridional (mer).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।