Quiz Class 12th Category: Class 12th You must log in to pass this quiz. Quiz Class 12th Chemistry 22-04-20265 Q. 1 / 5The unit of rate constant for a zero-order reaction is?शून्य कोटि की अभिक्रिया के लिए दर स्थिरांक की इकाई है? $$s^{-1}$$ $$mol^2 L^{-2} s^{-1}$$ $$mol L^{-1} s^{-1}$$ $$L mol^{-1} s^{-1}$$ 2 / 5Which of the following is an example of a colligative property?निम्नलिखित में से कौन-सा एक अणुसंख्यक गुण (colligative property) का उदाहरण है? Osmotic pressure (परासरण दाब) Boiling point (क्वथनांक) Freezing point (हिमांक) Vapor pressure (वाष्प दाब) 3 / 5Phenol reacts with $$CHCl_3$$ and $$NaOH$$ to give Salicylaldehyde. This reaction is known as:फिनोल, $$CHCl_3$$ और $$NaOH$$ के साथ अभिक्रिया करके सैलिसिलैल्डिहाइड बनाता है। इस अभिक्रिया को किस नाम से जाना जाता है? Reimer-Tiemann reaction (राइमर-टीमैन अभिक्रिया) Kolbe's reaction (कोल्बे अभिक्रिया) ) Cannizzaro reaction (कैनिज़ारो अभिक्रिया) Wurtz reaction (वुर्ट्ज़ अभिक्रिया) 4 / 5The process of protecting iron by coating it with zinc is called:लोहे पर जिंक की परत चढ़ाकर उसे सुरक्षित रखने की प्रक्रिया को क्या कहते हैं? Corrosion (संक्षारण) Galvanization (गैल्वनीकरण) Annealing (एनीलिंग) Electrolysis (विद्युत अपघटन) 5 / 5Which of the following nitrogenous bases is NOT present in DNA?निम्नलिखित में से कौन-सा नाइट्रोजनी क्षार DNA में उपस्थित नहीं होता है? Cytosine (साइटोसिन) Guanine (गुआनिन) Adenine (एडेनिन) Uracil (यूरेसिल) Your score isThe average score is 0% 0% Restart quiz Quiz Class12th Physics 22-04-20265 Q. 1 / 5Which of the following does not change when light travels from one medium to another?जब प्रकाश एक माध्यम से दूसरे माध्यम में जाता है, तो निम्नलिखित में से क्या नहीं बदलता है? Velocity (वेग) Amplitude (आयाम) Wavelength (तरंगदैर्घ्य) Frequency (आवृत्ति) 2 / 5What is the SI unit of electric flux?विद्युत फ्लक्स की SI इकाई क्या है? Volt-meter (वोल्ट-मीटर) Weber (वेबर) Tesla (टेस्ला) Newton/Coulomb (न्यूटन/कूलॉम) 3 / 5The power of a lens is -2.0 D. Its focal length is:एक लेंस की क्षमता -2.0 D है। इसकी फोकस दूरी है: 100 cm 20 sm -50 cm 50 cm 4 / 5In a Young's double-slit experiment, if the distance between the slits is halved, the fringe width becomes:यंग के द्वि-झिरी प्रयोग में, यदि झिरियों के बीच की दूरी आधी कर दी जाए, तो फ्रिंज की चौड़ाई हो जाती है Four times (चार गुनी) Double (दोगुनी) Remains same (वही रहती है) Half (आधी) 5 / 5A semiconductor has a ________ temperature coefficient of resistance.एक अर्धचालक में प्रतिरोध का तापमान गुणांक ________ होता है। Positive (धनात्मक) Zero (शून्य) Infinite (अनंत) Negative (ऋणात्मक) Your score isThe average score is 0% 0% Restart quiz QUIZ CLASS 12TH PHYSICS 23-04-26 1 / 5The SI unit of electric flux is: J.m J/C V.m N/C 2 / 5Light year is a unit of: Time Distance Velocity Intensity of light 3 / 5Which of the following is a fundamental (base) SI unit? Watt Newton Ampere Joule 4 / 52. How many significant figures are in the number 0.002050? 3 6 7 4 5 / 5Which of the following is a fundamental (base) SI unit of Time? Hour Minute Second Mili Second Your score isThe average score is 0% 0% Restart quiz QUIZ CLASS 12TH CHEMISTRY 23-04-26 1 / 5Which law states that "Matter can neither be created nor destroyed"? Law of Definite Proportions Law of Conservation of Mass Avogadro's Law Law of Multiple Proportions 2 / 5Molarity of a solution is defined as: Grams of solute / Liter of solvent Moles of solute / Liter of solution Moles of solute / Kg of solvent Moles of solute / Liter of solvent 3 / 5Which of the following is a homogeneous mixture? Mixture of iron filings and sulfur Sand and water Oil and water Sugar solution in water 4 / 5Which of the following will have the highest boiling point? 1 ml Urea solution 1 ml NaCl solution 1 m MgCl2 solution 1 ml Glucose solution 5 / 5The number of moles of solute present in 1 kg of solvent is called: Normality Molality Molarity Mole fraction Your score isThe average score is 0% 0% Restart quiz 0 votes, 0 avg QUIZ CLASS 12 CHEMISTRY 24-04-26 1 / 5The oxidation number of oxygen in H₂O₂ is: 0 -1 +1 -2 2 / 5The hybridization of carbon in methane is: sp² dsp² sp sp³ 3 / 5Which gas is evolved during electrolysis of water at cathode? Nitrogen Hydrogen Oxygen Chlorine 4 / 5Which of the following is a strong electrolyte? NaCl Glucose Ethanol Urea 5 / 5The IUPAC name of CH₃COOH is: Butanoic acid Ethanoic acid Propanoic acid Methanoic acid Your score isThe average score is 0% 0% Restart quiz QUIZ CLASS 12 PHYSICS 24-04-26 1 / 5The phenomenon of total internal reflection occurs when light travels from: Rarer to denser medium Denser to rarer medium Vacuum to air Air to vacuum 2 / 5In a purely resistive AC circuit, the phase difference between voltage and current is: 0° 90° 180° 45° 3 / 5The SI unit of magnetic field is: Weber Tesla Henry Gauss 4 / 5The SI unit of electric flux is: Volt Coulomb Nm²/C Tesla 5 / 5The energy of a photon is given by: E = mc² E = hv E = mv² E = 1/2 mv² Your score isThe average score is 0% 0% Restart quiz
